7 Best Rust Prevention Sprays to Blitz Rust Before It Becomes a Problem

When it comes to automobile maintenance, rust prevention should be a top priority – and there are plenty of great products out there to lend a helping hand. 

In this article, you’re going to learn all about the benefits of using rust-proofing sprays, as well as how they work. We’ll also go through what you need to consider when buying these products and run the rule over the best rust prevention sprays on the market with a series of mini-reviews. 

Ready to protect your vehicle from rusting? Let’s begin!

Quick Links to Our Top Recommendations for the Best Rust Prevention Spray

• POR-15 45404 Rust Preventive Coating
  • Our top pick for buyers looking to treat rust quickly and with a minimum of hassle.
• BOESHIELD T-9 Rust & Corrosion Protection/Inhibitor
  • A great choice if you’re looking for something that’s more than just a corrosion inhibitor.
• Fluid Film FLUIAS11 Lubricant/Corrosion Inhibitor
  • Stops oxidation, protects your vehicle from further deterioration, and outperforms similar products in winter conditions.
• CRC 06026 Heavy-Duty Corrosion Inhibitor
  • This heavy-duty dripless spray is ideal if you happen to live in a humid climate or near the sea.
• 3M 03584 Professional-Grade Rubberized Undercoating
  • This one’s easy to apply, reduces road noise, tidies up existing corrosion, and leaves a chip and flake-resistant rubberized protective coat.
• Rust Bullet RBA53 Automotive Rust Inhibitor Paint
  • Durable, affordable, covers up to 100 square feet, and doesn’t require a topcoat.
• Permatex 81849 Rust Treatment
  • Not suitable for covering larger surfaces but ideal for spot-treating isolated corrosion outbreaks.

Note: Clicking the above links will take you to further information, current prices, and customer reviews on Amazon.

Best Rust Prevention Sprays – A Detailed Look at Our Top Recommendations

Below, we review our favorite products on the market and also discuss the advantages (and potential drawbacks) of each one.

POR-15 Rust Preventative Coating

If your vehicle is starting to show signs of rust and corrosion, POR-15 is a solid pick. This paint can be applied on existing patches.

You won’t have to exhaust yourself cleaning corroded metal, but note that preparing the surfaces you want to treat will always give a better finish.

You should also be aware that this is a colored paint. If you want to spruce up your truck bed or undercarriage, this product will likely do the trick, and the finished result will be smooth and sleek. A little goes a long way, too, so you won’t need to go overboard and waste liquid. It can also be used in a spray gun, thinned down by 5% if needed, using POR-15 solvent.

Once applied, it will dry into a hard-wearing gloss, and this will prevent the corrosion from expanding any further. It will be sealed permanently into place.

This hard shellac will protect non-corroded metal surfaces too. It’ll dry almost instantly after being brushed on.

One of the main advantages that POR-15 has to offer is durability. Once it’s dry, you won’t have to be concerned about cracking or chipping. It’s non-porous to inhibit moisture from seeping in and causing oxidation, and you can expect it to stay on for a long time to come.

Manufacturer’s Specs and Features

• Available in 1-quart and 1-pint cans.
• Black.
• Compatible with metal substrates.
• Permanent.
• Seals existing corrosion.

What We Like

• No need to scrub away existing rust.
• Durable seal.
• Glossy black finish.
• Non-porous.
• Easy to apply.
• Dries rapidly.
• Can stop oxidation escalating.
• Can be used with a spray gun.
• Great for underside of vehicles.
• Protective coating.

What We Don’t Like

• Sensitive to UV light.
• Toxic—be sure to use it in a well-ventilated area, and wear protective gear.
• Possibility of facing difficulties resealing the can.

Summary

Use POR-15 if you want to get the job done quickly and with minimum hassle.

The black finish is attractive, and it works pretty well to stop corroding patches from expanding. Apply using a brush or spray gun, but don’t use it in enclosed spaces, though.

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BOESHIELD T-9 Rust & Corrosion Protection/Inhibitor

This dripless spray is ideal for those of you who are looking for more than just a corrosion inhibitor.

Boeshield T9 can be used for multiple purposes, targeting and breaking down existing oxidation. It serves as a lubricant, meaning it can be used on squeaky doors. This also means it can loosen corroded mechanisms. The formula can also flush out traces of old lubricants caught between moving parts.

Although it’s dripless, this waxy substance is designed to be penetrative. It will remain liquid long enough to seep into tight spaces. By the time it dries, the liquid should be covering everything it needs to protect. The film isn’t sticky, so it won’t attract debris or dirt.

You can also apply it almost anywhere on your car, as the spray won’t harm plastic trim, vinyl, or your paintwork. Spray it inside your engine or even on your electronics (e.g. wires). T-9 isn’t made from conductive ingredients, so it won’t cause short circuits. The film is waterproof, so washing your vehicle won’t wear the product away.

If you need to get this substance off for whatever reason, there’s no need to panic, as a standard solvent or emulsifying cleaner should remove Boeshield T-9 quite easily.

Manufacturer’s Specs and Features

• Can capacity: 12 ounces.
• May be available in other sizes.
• Dripless spray.
• Compatible with many surfaces: metal, paint, vinyl, and plastics.
• Suitable for use on existing corrosion.
• Waterproof.
• Acts as a lubricant.

What We Like

• Developed for aircraft components.
• Won’t damage non-metal or painted components.
• Includes lubricants.
• Resilient.
• Versatile applications.
• Simple to remove on surrounding areas.
• Mess-free.

What We Don’t Like

• Spray nozzle tends to block easily, but running it under hot water seems to resolve the problem.

Summary

BOESHIELD T-9 is a multipurpose product that’s straightforward to use. You can also rest assured it won’t stain anything or damage non-metal parts.

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Fluid Film Powerful Rust & Corrosion Protection

Fluid Film is another dripless spray that can inhibit the progression of rust and protect against further corrosion.

The non-toxic formula is made with lanolin, also known as wool-wax. This makes it eco-friendly and safe for use on the majority of plastic as well as painted surfaces.

This product is a potent weapon against corrosion, and it’s even capable of stopping pitting from growing worse on chrome surfaces.

Because the film it creates is fluid rather than solid, there’s no concern over cracking or chipping. This fluid quality also makes it a great lubricant for the moving mechanisms in your car.

But that’s not all – there’s another advantage to the consistency of this product: It’s liquid enough to get into hard-to-reach spaces, ones that thicker liquids cannot. So, you can rest assured it will spread everywhere needed.

It’s non-conductive, which means you can use it without worrying about getting it on your battery terminals. The consistency is also thin enough so that it won’t turn to gunk.

This shield will stop nasty compounds such as road salt from sticking to your undercarriage. It won’t freeze when the temperatures drop either. 

One of the designated purposes of this spray is to actually protect winter equipment. It contains agents that inhibit snow and ice from sticking to any metal surface, so applying it could mean no more icicles to crack off your vehicle on winter mornings.

Manufacturer’s Specs and Features

• Can capacity: 11.75 ounces.
• May be available in other sizes.
• Dripless spray.
• Compatible with all metal surfaces.
• Suitable for use on existing corrosion.
• Won’t harm most plastics and paints.
• Non-toxic.
• Eco-friendly.
• Acts as a lubricant.

What We Like

• Can be used throughout your vehicle and home.
• Lubricating properties.
• Long-lasting protection.
• Non-toxic and environmentally friendly.
• Repels ice.
• Stops corrosion from progressing.
• Effective on pitting.
• Spreads throughout nooks and crannies.

What We Don’t Like

• Might soften existing undercoating in certain vehicles.
• May not last long under harsh conditions (e.g. prolonged exposure to road salt).

Summary

This product can effectively stop oxidation and protect your vehicle from further threats. It also contains agents that make it a great choice for bitter winters. All told, this is a contender for best rust prevention spray out there for car owners who live in cold climates.

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CRC Marine Heavy Duty Corrosion Inhibitor

Living in a balmy, humid climate or by the sea is surely lovely but it’s much less healthy for vehicles than it is for most people. To be more precise, salt and humidity are two of the primary environmental causes of corrosion. This heavy-duty dripless spray is designed to withstand these exact conditions.

It can be applied to your engine components, electrical connections, and metal surfaces, providing vehicle-wide protection against oxidation.

Another positive feature is that it’s waterproof. Trips through the car wash or a bout of stormy weather won’t necessitate another treatment.

Once you spray it on, the liquid will dry to a waxy film. It doesn’t dry instantly, so it can penetrate deeper into the rusted areas.

All these attributes make it great for winter protection, too. The resilient film will shield your vehicle’s undercarriage from road salt and everyday exposure to moisture (such as snow).

You’ll be able to protect more than just your car from corrosion, too. For example, you can use this product on your off-road or marine vehicles and equipment as well.

If using it on visible areas, be aware that this product is a light brown color.

Manufacturer’s Specs and Features

• Bottle capacity: 10 ounces.
• Available as a package of one, four, or six cans.
• Dripless spray.
• Suitable for use on existing corrosion.
• Resistant to salt spray and high humidity.
• Compatible with metal surfaces, engine components, electrical connections, and more.

What We Like

• Ideal for humid climates.
• Protects vehicles close to the sea.
• Multiple uses (e.g. boats).
• Waterproof.
• Sustainable.
• Reaches nooks and crannies.
• Can treat surfaces throughout your car.

What We Don’t Like

• Might leave visible residue on some surfaces.
• Spray nozzles tend to block easily.
• Not a clear liquid, leaves a light brown color.

Summary

If you’re living in a humid climate, CRC Marine is an ideal choice to inhibit corrosion on your vehicle. The same goes for those of you who live by bodies of saltwater.

It’s long-lasting and can be used nearly everywhere on your automobile. Be aware, however, that the color may not be suitable on visible areas.

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3M Professional Grade Rubberized Undercoating Spray

This product can act as a potential alternative to a professional car undercoating. As the name suggests, it dries into a durable rubber coat once applied.

You can use it on all exposed metal surfaces on your vehicle that are susceptible to oxidation – this includes your wheel wells, under the hood, interior fenders, etc .. you get the idea.

The aerosol can is nearly effortless to use. You won’t have to soak the area you’re targeting, and just one coat should be enough. It won’t sag or drip as you’re spraying it out, either. 

A big benefit that this dripless spray has to offer is the final result. The finished product is a black, flat finish. 

The rubberized coat itself is chip and flake resistant. It’ll hold up as a barrier against everyday menaces such as moisture, dust, and inclement weather that encourage oxidation. The thick rubbery layer will repel grit and grime too.

The spray is asphalt-based, so you can expect it to last for quite a while.

Last but not least, this undercoating will do more than just resist corrosion – it also has sound-deadening properties. This means that after treatment, you should hear less road noise than you’re accustomed to, which is a great added benefit for many drivers.

Manufacturer’s Specs and Features

• Can capacity: 16 ounces.
• Available in packages of one can through five cans.
• Dripless tar-based aerosol spray, black.
• Compatible with most metal surfaces.
• Suitable for use on existing corrosion.
• Rubberized formula undercoating.
• Aerosol dispenser.
• Includes sound-deadening agents.

What We Like

• Reduces road noise.
• Smooth matte finish.
• Won’t chip or flake off.
• No mess.
• Stops existing corrosion.
• Well-known manufacturer.
• Requires only one coat.

What We Don’t Like

• Multiple cans required to treat the average car.
• Black finish might be suitable for some applications.
• Protective mask and gloves must be worn.

Summary

This professional-grade product by 3M is an attractive choice for treating exposed metal on your vehicle. It also has aesthetic, as well as protective applications on black surfaces.

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Rust Bullet Automotive Rust Inhibitor Paint

This tough metallic gray paint by Rust Bullet has a range of enticing features.

Firstly, users with vehicles that are metallic gray won’t have to use a topcoat with this product. It’ll protect the bare metal against UV light and scratches, as well as oxidation.

The formula also does a good job of preventing the spread of existing corrosion. Minor-to-moderate patches can be painted over directly; just get rid of loose flakes before applying it. This makes it convenient for those metal surfaces that are already corroding. You can use it on steel or iron, regardless of whether it’s painted or unpainted.

As we’ve already mentioned, this product is made to last. You’ll want to be careful while you’re applying it, though—as this substance doesn’t come off easily.

It has strong adhesion and sealing properties, and oxidation trapped underneath it won’t be able to bubble through or bleed out.

The upside is that you’ll know for a fact that your car will be well-protected. Once dried, the metallic gray finish won’t chip or flake off. It also provides a decent base for a topcoat to be applied over it, although this isn’t required.

A small quantity will go further than you would think. One quart can cover up to 100 square feet of surface area. And it can be applied with a spray gun, roller, or brush – so you have multiple methods of application to go with, depending on which you’re most comfortable using.

Manufacturer’s Specs and Features

• Can capacity: 1 quart.
• Also available in 1-pint, ¼-pint and 1-gallon sizes, in single or multi-packs.
• 1 quart covers up to 100 square feet.
• Can be applied over unpainted or painted iron and steel surfaces.
• Suitable for use on existing corrosion.
• Metallic gray.
• UV resistant.
• 72-hour cure time.

What We Like

• Stops oxidation from spreading.
• Long-lasting.
• Doesn’t require a topcoat.
• Scratch resistant.
• Smooth finish.
• Minimal preparation.
• Can be sprayed, brushed, or rolled on.
• Generous coverage.

What We Don’t Like

• Minimum of two coats required.
• Recommended 72-hour cure time.
• Difficult to store open cans for long periods of time.
• Toxic—protective gear is a must.

Summary

Users looking for a rust prevention product that will withstand the test of time may be interested in buying this rust inhibitor.

Treatment is convenient, and you won’t need gallons and gallons to treat your automobile. Remember to wear protective clothing when using, though!

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Permatex Rust Treatment

This treatment is suitable for users with specific rust-proofing needs, but it’s also appropriate for those who have already treated the bulk of their vehicles (e.g. undercarriage). It’s great for treating surfaces that won’t get super-heated, such as your wheel wells.

If you want to target corroded metal on your vehicle’s bodywork, Permatex is also a good choice. You can paint over it directly without having to use a primer.

The formula uses polymer-based ingredients to form a seal over existing rust, and you’ll know that the spray is effective when the affected area turns black. And if you have scratches or chips that have resulted in bare metal being exposed, Permatex will help protect against corrosion.

You can use it as insurance against oxidation before painting over these spots, and this will guarantee that if degradation has started in any form, it shouldn’t escalate any further.

Although it’s a spray, you can adapt the application method to meet your needs. You can spray the liquid into a container and use a fine brush for precision – it’s a spray that can also be painted on.

Since the liquid doesn’t dry instantly, you’ll have more than enough time to correct any unintended errors. And if you do accidentally get any of this product on surrounding areas (e.g. plastic or fiberglass), you can simply wipe it off.

Manufacturer’s Specs and Features

• Can capacity: 10.25 ounces
• Available as one can or a pack of 12.
• Also available in 8-ounce or 16-ounce cans.
• Liquid spray.
• Converts existing rust.
• Compatible with metal surfaces.
• Acts as a paint primer.
• 24-hour drying time.

What We Like

• Prevents minor to moderate corrosion from escalating.
• No topcoat needed.
• Serves as a primer.
• Best used to rust-proof smaller areas.
• Prevents oxidation from recurring.
• Can be sprayed directly or applied with a paintbrush.
• Won’t stain paintwork or other materials if removed immediately.

What We Don’t Like

• Quite ineffective at temperatures exceeding 200 degrees Fahrenheit.
• Takes up to 24 hours to fully cure.
• Incompatible for use on exterior sheet metal repairs.

Summary

Permatex rust treatment is one of the top rust prevention sprays for users looking to target corrosion on fixed areas. It will stop oxidation from returning and can be painted over without needing a top coat.

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What Are Rust Prevention Sprays? And How Do They Work?

These products inhibit rust from forming on your vehicle. You apply them to areas that are prone to corrosion, such as the undercarriage.

This form of protection is also known as undercoating.

You can choose to have it done by your mechanic, but this is likely to be costly. In addition to the expense, your car may also have to spend several days out of commission.

This is because professional undercoating can be complicated. Professional undercoating involves drilling holes into your vehicle’s body, and then it can take time for the proofing substance to be applied and take effect. Once applied, the active ingredients in these sprays will shield metal parts against oxidation.

The specific formula is distinct to the manufacturer. These can include polymerized materials, such as polyurethanes. Asphalt is another substance used in rust-prevention products, due to its durability and water resistance.

Generally speaking, any compound that can dry into a resilient coat without impacting performance can be used in these rust-proofing products. Some brands contain other agents (e.g. lubricating) for added benefits.

It should also be noted that some of these products are multipurpose. These are capable of stopping existing rust from spreading, as well as preventing new occurrences.

Why Do Vehicles Become Rusted?

Wondering what might cause rust to form on your vehicle?

All vehicles can corrode in one way or another. This is because iron and iron alloys (mixes of iron and other metals) oxidize when exposed to water and oxygen.

Oxidation is a transformative chemical reaction. As an example, it turns plain old iron into hydrated iron oxide: a combination of iron, water, and oxygen.

Other factors—such as saltwater and humidity—can speed up the process. 

Fortunately, the average modern vehicle is designed to inhibit this natural phenomenon. The paintwork and paint finish on your car (or trucks, RVs, etc) is more than just aesthetic. It’s formulated with additives to strengthen it in various ways.

The same is true of the substances we use inside our cars, from motor oil to fuel and coolant. You can even purchase additives separately for enhancing your oil or fuel.

Additives are compounds that have useful properties, such as UV protection or heat resistance. For our current purposes, there are rust-inhibiting additives that you can get as well.

Most components in newer vehicles are built with rust-resistant galvanized metals. If you have an older car or an antique, though, this won’t be of much help. And for cars both old and new, harsh roads and weather conditions can provoke corrosion with time.

The undercarriage, where all the support structure is exposed, is particularly vulnerable. Additives in your oil can keep the internal circulatory system clean, but can’t do much for the pipe exteriors.

Accidents can also result in those trademark orange-red patches of rust. If your paintwork is scratched away, the metal underneath will eventually oxidize.

Don’t forget that corrosion can (and does) spread if untreated. What starts off as a small spot on the bottom of your driver’s side door can start to grow underneath it and eventually become a huge problem.

Benefits of Using Rust-Proofing Spray

Nearly every car owner can benefit from rustproofing products. The costs of allowing oxidation to progress can be quite high and should be avoided. In the following sections, we’ve listed some of the most important reasons why you should consider buying one.

Safer Operation

This is the biggest factor that should influence your decision to rust-proof your car.

When metal corrodes beyond a certain point, it begins to weaken. If it’s a moving mechanism, this means it could start to break down.

Bits and pieces falling off your car can put you, your passengers, and other drivers on the road in danger. Anything that poses a potential danger to your vehicle’s safety is considered a risk by the National Highway Traffic Association. Needless to say, you don’t want any mechanical components failing while your car is in motion. 

Longer Vehicle Lifespan

The best way to prolong a vehicle’s lifespan is with good care and maintenance. This isn’t limited to keeping up with basic repairs or essentials such as oil changes, it also means taking measures to prevent rust problems before they begin. Stopping corrosion from taking hold is one prime example.

Avoid Costly Repairs

There’s no reason to adopt a wait-and-hope attitude toward oxidation. Once a component has severely corroded, there’s no way to repair it.

Metals that have been eaten away can’t be restored by any product. Certain mechanisms can be prohibitively expensive to replace.

For this reason, you could avoid costly visits to your mechanic by using corrosion-inhibiting sprays before problems occur.

Overall Protection

The road can be harsh on our vehicles. As you can probably imagine, the undercarriage takes the brunt of this wear and tear.

A rust-proofing spray can keep your vehicle protected from more than just oxidation – it can also shield treated areas from abrasion.

If you live in a region with frigid winters, you’ll definitely want this protection.

Road salt that dissolves ice and snow can be particularly destructive to your car. Salt has corrosive properties and, when mixed with water, can speed up the oxidation process.

What’s the Difference Between Rust-Proofing Sprays, Converters, and Removers?

There are many different corrosion-fighting chemicals on the market today. We’ve covered the best rust converters, best rust removers and more on this site, but here’s a recap of the main differences between them:

Rust Converters

These are chemicals that convert the oxidization, stopping it in its tracks. The end result of the conversion is a black patch that you can prime or paint over safely.

They usually include weaker acids, such as phosphoric or tannic. Some of these converters contain inhibiting ingredients too.

These save you from having to immediately cover the treated section with paint. The chemicals should prevent corrosion reforming.

You might have to put in some elbow grease before you use a rust converter, though. For the best possible results, as much of the oxidizing metal should be cleaned off as possible.

Rust Removers

These chemicals dissolve and remove rust that already exists, breaking it down entirely. You’ll then be left with bare metal. Most removers are formulated with acids, although non-toxic varieties exist too, in case you prefer to work with those.

Rust Prevention Products

To sum it up, all converters and removers are for treating corroded metal. For more details on the exact process, check our guide on how to remove rust from cars.

Finally, you have proofing sprays or rust spray paint—the topic of this article.

Not all of these can be applied to existing oxidation. Instead, these products are more about preventing further rust problems from coming up in the future, rather than curing existing problems.

What Types Of Rust Prevention Products Can I Choose From?

It’s time to go over the different types of products you can choose from. In this section, you’ll also find out how to determine which of these types will best suit your needs.

Professional-grade undercoating often uses specialized industrial rubber sealants. A more recent innovation is using electricity to prevent oxidation. There’s not much research to show whether these devices are useful or not yet, though.

Sprays

Rust-proofing sprays can fall under one of three categories: dripless, drip oil, and tar-based. They can also be clear-coated or colored, depending on the brand.

Drip Oil

Drip-oil sprays have a fine consistency that allows the liquid to get everywhere it needs to go, such as between tight components and mechanisms.

As the name implies, you can expect it to drip for a while after you apply it. Again, this is to ensure the oxidation-inhibiting gets into all the tight spaces.

This type of product has one major downside to it, though: it’s messy. The formulas aren’t harmful to your vehicle, but can stain your garage or driveway. They also tend to take longer to completely dry when compared to other variations.

If you’re concerned about effectiveness above all else, drip oil might be the best choice for you. The water-like formulation of the sprays enhances coverage. Some are able to combat surface corrosion too.

Dripless

Dripless sprays are formulated to dry shortly after application.

Typically, the applied substance begins to harden almost as soon as it’s exposed to air. This provides a protective layer for the vehicle’s components.

If you choose to go with this type, you won’t have to deal with dripping.

The tradeoff is that these are thicker, which means they might not give you as much coverage as drip oil does. Nooks and crannies may not get a thorough dose unless you’re vigilant or can get your car on a ramp.

Tar-Based

Tar-based sprays use a substance with properties similar to tar: thick and rubbery. Examples of ingredients include materials such as rubber or latex.

As with dripless products, tar-like rust inhibitors will harden after exposure. They form a tough shield against salt, water, and other harmful debris.

The problem with this type is that you have to be very careful with application. Otherwise, the hard shell can crack, which ultimately defeats the purpose of applying it in the first place.

As long as you have a clear shot at the treated areas, they should hold up pretty well.

Note that, for most brands, any traces of existing oxidation will have to be thoroughly removed before application. If not, the metal can continue to corrode out of sight.

Paints

Rust-proofing paints can be viscous and hard-drying, or water-like in consistency. Depending on what you’re aiming to protect, they can be a great option.

For example, say you have a large section that you can easily access, such as the bed of a truck. In this case, paint might be a great choice. Owners of larger vehicles may also prefer paint rather than buying multiple spray cans.

Paints can also come in different colors. If you want to use it on your vehicle’s body, you can pick a shade that matches your paintwork. 

As with dripless and tar-based types, paints can be hit or miss. If you’re not meticulous, you could end up with areas that don’t get coated.

Paints can also be more of a challenge to use, so be prepared to get your brush or rollers out. With a spray can, you don’t have to do much, apart from aim and hold the nozzle down.

Paint Vs. Spray – What’s the Difference?

The difference between rust-proofing paint and spray is all about the application process and packaging. As a matter of fact, sprays and paints can share similar oxidation-preventing ingredients.

Paints can have more diversity in terms of color, while sprays are generally limited to clear coat or black. Also, you’ll usually get a larger quantity of product with paints.

With sprays, on the other hand, everything you need is the can itself. Paints need equipment such as brushes and possibly require more cleanup afterward.

Buyer’s Guide – How to Choose a Rust Prevention Spray

There are quite a few considerations to bear in mind before you buy anything for rust-proofing your vehicle. You want to be sure you pick a product that works well for you as well as your automobile, so take note of the following:

Compatibility

Consider what you’re going to be applying the substance on, and check the product guidelines to make sure the product you’re thinking of buying is compatible.

Will it work on all sorts of metal or just on particular types? Will it damage surrounding materials such as plastic trim, or potentially affect your vehicle’s paint?

Size of Area to Treat

Automobiles come in all sorts of different shapes and sizes. A small can might be fine for a Mini Cooper, but not for a Jeep.

Many of these products will at least give you an estimate of how much they can treat, so pay attention to that.

Be sure you get the right quantity for the job at hand. You don’t want to be caught with only half your car treated and no more product left in the can for the other half!

Vehicle Condition

If you do have degrading spots on your vehicle, choose carefully. Not all proofing liquids can be applied to metal that’s already corroded.

If you don’t want to scrub or sand it off, select a product that can halt oxidation.

Type

Review our section above where we discuss the different types of sprays (and rust-proofing products in general) to find out which type works best for you.

As a reminder, those of you who are particularly concerned about stains on your floor may want to choose tar-based or dripless liquid, or paint.

It’s worth repeating that if your concern is ultimately the most comprehensive treatment, a drip oil is best in that case.

With that being said, there are advantages and disadvantages to each type, and no single one is right for all vehicle owners. Your priorities matter!

What Else Can It Do?

Remember we mentioned that some products are multi-purpose?

A few good questions to ask yourself before buying any rust-proofing spray are: Does the formula have additional ingredients such as lubricants? Is it resistant to sub-zero or extremely hot temperatures?

Know what it can do, and how this aligns with your needs.

Durability

How long can you go between applications? Ideally, you want the rust-inhibiting action to last for as long as possible.

This may seem obvious, but remember that the longer it lasts, the less often you’ll need to worry about problems.

Toxicity

Because they contain harsh chemicals of all sorts, many types of automotive products can be toxic, and rust-proofing sprays are no exception.

Such chemicals can cause burns or respiratory distress if inhaled. So, be sure to read the label to know if you’ll have to wear protective clothing or wear a mask while using any product.

You should also be aware whether or not you may need to use it in a well-ventilated area.

This could be difficult if you don’t have a suitable indoor workspace and are in a region prone to adverse weather conditions. In this case, make sure that the season is conducive to outside work.

Eco-Friendliness

Preserving the environment is an important consideration for many of us these days.

If you prioritize eco-friendliness, this is another reason to avoid toxic products if you can. In addition, it would be best if you look for products that are also biodegradable.

Drying Time

Remember that certain types, such as drip oil, take longer to dry. If your chosen brand has a longer drying time, you need to have a plan in place.

Your car might be out of action for several hours, or even a few days. Driving it too soon could mean you waste both time and money, so you’ll need to have an alternative transportation method at the ready in the meantime.

Appearance

This is for those of you who really care about how your car looks at all times.

If you’re using a colored paint, is it a near match to your original color? Will it leave a smooth surface when dry? Will a clear-coat liquid leave any residue that will look unsightly?

Conclusion

Don’t underestimate the power of preemptive action when it comes to your vehicle!

By being proactive and not reactive about stuff like this, you can save yourself grief, expense, and effort later on by rust-proofing your car or truck now.

Remember that no automobile is immune to corrosion, no matter how new or well-cared for it is. Hopefully, you’ve found the best rust-proofing spray for your needs among our reviewed products.

If you have feedback or any questions you’d like to ask, be sure to drop us a line. We’d love to hear your thoughts in the comments, and as always – we’ll respond to each and every one of you in due time!