Top 10 Rust Converters In 2021

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If you’re looking for ways to prevent the metal elements of your car form rusting, you’re in the right place.

Rust converters penetrate rust and bind it together to create a new polymer compound. This binding aims to prevent rust from spreading and blocks future rust from occurring.

If that sounds like the solution you’ve been looking for, keep reading.

In this post, I’ve listed the best rust converter brands in the market to help you find the right one for you.

Let’s dive in!

1. Corroseal Water-Based Rust Converter With Latex Metal Primer

Pros

✅Treats tough rust

✅Covers large area

✅Impressive result

✅Easy to use

✅Water-based washes easily

✅One-step application

✅Unlimited usage

✅Non-corrosive and non-flammable

✅Versatile

✅Effective

Cons

🚫A bit pricey

🚫Not weather-proof

🚫Dense material

🚫Unpleasant odor

🚫Preparation takes time

Specs

  • Weight: 10.20 pounds
  • Dimensions: 2.5 x 2.5 x 8 inches

Features

  • Water-based rust converter
  • Water-based rust converter with latex metal primer
  • Use for all marine, automotive, general household, and industrial applications
  • Easy cleanup

What I Like

Protects steel from the toughest rust and corrosion

I’m relieved because I found a solution to get rid of the rust build-up on my roof and car. Corroseal Water-Based Rust Converter’s formula prevents rust from developing further, keeping my roof and car from rotting.

It primes metal surfaces with latex that gives a one-step corrosion control.

 

Time and cost-effective

It saves me more time and money because I don’t have to sandblast or scrub off the rust. You can paint and prime, and convert with just one product. 

With just one gallon, you can cover areas up to 250 square feet.

 

Safe and easy to use

What’s good about Corroseal is that it’s safe and so easy to use.

Corroseal is non-flammable and non-corrosive, considering the fact of its potent formulation. It’s water-based so cleaning up is quick, easy, and safe.

It’s a latex compound that means it’s water-based. So it’s safer to use and remove from your skin. It’s also eco-friendly in case you spill it, not to mention easy to clean up.

What I Dislike

It’s not heat-resistant

Exposure to sun and heat causes Corroseal to bubble. That means you have to store it in a cold or moderate area.

 

Requires more prep work before using

To avoid any issues, it is important to read the instructions before using this product. 

It is vital to use the exact amount that you need to prevent misuse. 

 

Quite expensive

It costs more than any other brands and might scare away thrifty 

buyers. 

Who Should Buy?

Corroseal is ideal for people who are looking for the toughest rust eliminator. It’s a powerful water-based rust converter that works on both heavy and light rust problems.

2. Evapo-Rust Original Super Safe Rust Remover

Pros

✅Versatile, non-corrosive, and biodegradable

✅Efficient

✅Safe to use

✅Non-toxic formulation

✅Safe for skin and eyes

✅Environment-friendly formula

✅Safe for children and pets

✅No special equipment necessary for its application

✅Will not discolor materials like plastic or paint

✅Leaves the metal looking new when cleaned off

Cons

🚫It doesn’t remove all the rust

🚫Time-consuming

Specs

  • Weight: 8.65 pounds
  • Dimensions: 4.5 x 7 x 10.5 inches

Features

  • Non-corrosive
  • No fumes or foul odors
  • Non-flammable
  • No VOC’s
  • Water-soluble
  • Will not harm unrusted steel
  • Will not affect plastic, PVC, Viton, and most paints

What I Like

It’s safe to use 

What I look for when using these types of products is its safety. I’m happy to know that Evapo-Rust is safe to use on different objects.

I can use it even without an eye shield, gloves, or masks. 

It has no acids, so it’s non-toxic and eco-friendly. You can even use it on cookware and toys.

 

Convenience and excellent performance

Evapo-Rust is excellent to use because it doesn’t affect areas that are not rusting. It doesn’t even damage painted surfaces.

It doesn’t destroy, peel, or stain paint or base metal, so it’s safe to use even cars, SUVs, vans, and other vehicle types.

It doesn’t contain any acid, VOCs, or solvents that harm and stains surfaces. 

What I Dislike

It takes time to remove rust

It’s frustrating to use because it eats up my time to remove stubborn rust. Even if it just need a sponge or a cloth to use on metal surfaces, it 

still takes a lot of scrubbing.

 

It’s not long-lasting

It’s disappointing because it doesn’t protect metal surfaces from future corrosion for a very long time. It will rust again if it’s not maintained.

 

Not ideal for large projects

Evapo-Rust works best if your project is immersed in the formula. 

Hence, it’s not perfect for massive objects. 

Who Should Buy?

It’s ideal for those looking for a rust remover that doesn’t harm the environment. It’s biodegradable yet effective.

3. Rust-Oleum Professional Grade Rubberized Undercoating Spray

Pros

✅Low cost

✅Professional grade

✅Easy to use

✅Durable

✅US Made

✅Quality rubberized coating

✅Paintable

✅Not watery

✅Can be applied on bare or primed metal

Cons

🚫Heavy odor

🚫Two coats needed

Specs

  • Weight: 1 pound
  • Dimensions: 10 x 2.99 x 2.99 inches

Features

  • Perfect for use on bare or primed metal underbodies of cars, trucks, trailers, RVs, and more
  • Protection against corrosion and damage from water, salt, and other chemicals
  • Dries to the touch in 1 hour 
  • Covers up to 10-15 sq. ft. per can
  • deaden sound and reduce damage to parts
  • Features a wide, comfort spray tip and any-angle spray technology Available in 17″, 18″, 20″, and 22″ diameters with various widths and off-sets
  • Matte black painted finish 
  • Lifetime structural and a one-year finish warranty against peeling or lifting 
  • Protective rubberized finish
  • Paintable for a custom finish

What I Like

Noise reduction guarantee

Rust-Oleum reduces the sound and noise of rusty undercarriage, wheel wells, and quarter panels.

It helps rids unwanted sound and annoying squeaky noise while 

on the road. It also protects your vehicle undercarriage from corrosion and other chemical damage. 

 

Best guard for harmful elements 

You will not worry about harmful elements that can rot your undercarriage. 

Rust-Oleum shields your metal from everyday wear and 

damaging heat, dust, fumes, moisture, rust, and corrosion. 

Its Stop Rust formula provides a rubberized finish that blocks rust 

on cars, trucks, trailers, and other surfaces. 

 

Economical for its small size

Don’t be deceived by its size. Rust-Oleum can cover a wide surface, whether bare or primed coated.

It holds out long, and its quick-dry formulation is impressive.

Its 15oz. spray can cover surfaces up to 10 to 15 square feet.

What I Dislike

Prone to clogging

It’s just irritating when the nozzle clogs. Because the nozzle isn’t wiped or cleaned well after use, the paint will dry up and block the spray.

It’s a hassle cleaning it in your next use.

 

Longer drying time

It takes 1 hour to dry, depending on the temperature and weather.

Who Should Buy?

It is ideal for budget-conscious individuals who are looking for dual-use products. Aside from reducing unwanted noise from your undercarriage, it can also protect your vehicle from wear and tear.

4. Rust-Oleum Automotive Rust Reformer Spray

Pros

✅Works in less than an hour

✅Creates a smooth, primed surface

✅Doesn’t require rust sanding
Wide finger pad sprayer

✅Excellent primer

✅Indoors and outdoor use

✅Affordable

✅Bonds instantly

Cons

🚫Takes longer to dissolve in massive rust build-up

🚫Needs constant shaking to work properly

🚫Strong odor

🚫Not perfectly leveled out on rusty surfaces

🚫Unstable sprayer

🚫Thin texture

🚫Messy

Specs

  • Weight: 14.4 ounces
  • Dimensions: 2.5 x 2.5 x 8 inches

Features

  • Offers any angle spray with comfort spray tip for easy application
  • prevents future rust from returning
  • instantly converts rust into a protected, paintable surface
  • Resists heat up to 200°F
  • Not available at our Clybourn, IL or North & Kostner, IL locations
  • Made in the USA

What I Like

Prevents rust from coming back

You don’t have to worry about stubborn rust because Rust-Oleum Automotive Spray prevents it from coming back.

Rust yields and bonds with metal forming a flat-black shield making metal surfaces paintable.

It’s rust reforming agents help bond with rusting metal and chemically change it, allowing the paint to bind on the surface.

 

Ergonomic spray nozzle

You will find Rust-Oleum Automotive Spray convenient to handle and use because its nozzle is easy to spray.

You can easily spray in a back and forth motion without any stress.  

Its nozzle is made with a wide finger pad minimizing finger strain during long sessions.

What I Dislike

It doesn’t last long

You might get disappointed because Rust-Oleum Automotive Spray doesn’t last too long.

 

Unpleasant odor

It’s irritating, and you might find it hard to breathe because it gives out an unpleasant pungent smell. Wearing a mask and working outdoors is advisable when you’re using this. 

Who Should Buy?

This product is recommendable for car enthusiasts who want their vehicles to be in top shape. Its rust-preventing features offer complete rust-proofing protection.

5. POR-15 45404 Rust Preventive Coating Semi-Gloss Black

Pros

✅Made for both commercial and professional use

✅Long shelf life
Ideal for metal substrates

✅Waterproof paint

✅Very durable

✅Applicable directly

✅Completely lead-free

✅Won’t chip or crack after drying

✅Quick-drying

✅Very tough coat

✅Easy to prepare

✅Affordable

✅Acid and alkali- resistant

✅Fuel and oil repellent

Cons

🚫Hard to open

🚫Sensitive to UV light

🚫Paint suitable for metal only

🚫Protective gears recommended when using

🚫Limited choice of colors

Specs

  • Weight: 2.4 pounds
  • Dimensions: 4.25 x 4.25 x 5 inches

Features

  • Seals Rust permanently
  • No Need to remove rust before applying
  • For Metal Substrates
  • Professional Use
  • Non-porous, chemical resistant, permanent, moisture barrier
  • It prevents rust from coming back 
  • protects metal from further exposure to moisture
  • Used for  rusty frames, floor pans, farm equipment, marine equipment, or even a heavily corroded
  • Top coating is not required for areas not exposed to sunlight
  • heat resistant capabilities of up to 450 Fahrenheit.

What I Like

Rock-hard finish

You’ll be amazed how strong POR-15 45404 Rust Preventive Coating is when applied. 

You can strike it, hit it, ram it, or bend it. It won’t peel, wrinkle, or break after it dries out. 

Its dense composition and non-porous characteristics neutralize rust, creating an air-tight seal, making metal surfaces strong.  

 

Paint-like features

POR-15 45404 Rust Preventive Coating is convenient to use because 

has a paint-like consistency. 

It doesn’t need spraying or heating. All you need is a paintbrush to get the job done.

It spreads well and can paint a wide area. One quart can cover an astounding 96 square feet.

What I Dislike

You need a top coat because it’s not UV resistant

You might be disappointed because you will need to apply for a topcoat or under-chassis coat. After all, it’s not UV resistant. If not, it’s prone to peeling off. 

 

Quantity isn’t enough

Another disappointment is, one paint bottle isn’t enough to cover small cars. Its amount is 1 US quart (946 ml.). It means you have to order more than one container if you have a truck or an SUV.

Who Should Buy?

I recommend this product to car enthusiasts and homeowners looking for a more formidable and durable anti-rust coating.

6. VHT SP229 Rust Convertor

Pros

✅Heavy duty

✅Get a smooth finish by sanding.

✅Won’t require too much shaking

✅Stops rust at once upon contact

Cons

🚫Only comes in a spray, no brush-on option

🚫Sanding needs to be done before spraying.

🚫One can be enough, especially for large vehicles.

🚫Thick rust would need to be pre-treated

🚫Protective gear should always be worn

Specs

    • Weight: 13.6 ounces
    • Dimensions: 2.7 x 2.7 x 7.95 inches

Features

  • Easy application
  • Generates a black protective coat
  • Eliminates rust and produces an even finish
  • The nozzle doesn’t get jammed
  • Cures in a short time
  • Flameproof and can endure high temperatures. 
  • Budget-friendly
  • The best choice for automotive uses

What I Like

Ideal for tight spots

Its spray-on feature is an advantage since it can reach spots that brushes can’t. This would make it easier for you as well since it won’t be messy. 

 

Stays clear

This helps make it easier to see where the rust is and if it has been completely converted. 

 

The Spray doesn’t get clogged.

Once you are done, the liquid comes out on its own, so you won’t need to think about it getting clogged when you store it. 

 

Suitable for all rust problems 

This product is very versatile that you can use it on rusted metals, fiberglass, and even body fillers. This helps prevent future corrosion on surfaces.

What I Dislike

Difficult for thick rust

Pre-treatment is needed since it cannot convert thick rust. This would take up more time than usual, so you should be prepared for that.

 

Drying in the cold could be an issue. 

The surface will take a longer time to dry up if you are in a cold area. 

 

Hazardous content

You should be careful when applying or spraying the product. The vapor that comes from it can irritate your eyes and other internal organs. Avoid accidents and take extra care.

 

Too small for large projects 

The product only comes in one small size so that it won’t be ideal for large projects. That’s unless you’re willing to buy in bulk.

Who Should Buy?

This product is pretty much suitable for almost every car owner. It is something that you could add to your toolbox. 

It is also actually perfect for anyone who has items that need restoration. Since it comes in a small bottle, it would be suitable for minor projects. You can easily store it if ever you still have some left.

7. Rust Kutter - Professional Rust Repair

Pros

✅Uses Phosphoric acid

✅Comes in small and large sizes

✅Can be used as a primer and converter

✅Budget-friendly

✅Quick dry

Cons

🚫Needs to be washed off

🚫Safety measures should always be thought of

🚫May damage a painted surface

🚫May leak during use

🚫Always needs to be shaken before use.

Specs

    • Weight: 2.69 pounds
    • Dimensions: 10.5 x 4 x 4 inches

Features

  • Easy and ready to use
  • Sprayer bottle
  • Effectively eradicates rust and corrosion
  • High temperatures paint

What I Like

Effective and easy application

The product contains phosphoric acid, which is very useful for badly rusted items. It’s also convenient and easy to use. It comes in a spray bottle, so you won’t need to look for an applicator.

 

Can be used on any surface with rust

This product does not only work for automotive. It can also be used for other household items that tend to rust. 

 

Variations in size

It is available in a spray bottle and by the gallon so you can choose which one would be more suitable for your project.

What I Dislike

It takes a long time to dry.

It takes up to one day to completely dry up. You’ll need to be patient because it will take some time before you can paint the surface.

 

Toxic

You would need to wear gloves and goggles for safety precautions. As much as possible, work in an area with excellent ventilation. The odor and vapor shouldn’t get stuck in one place.

 

No glossy finish

It doesn’t dry that nicely, which is why it is advisable to apply paint after it dries up to get that glossy finish.

 

Overspray can damage the paint.

Make sure to spray the right amount and not put too many coats to damage the paint because of its chemicals.

Who Should Buy?

Ideal for those people who want to restore old items that have rusted over time. This can be used on vehicles, tools, or even surfaces of your homes. Just be sure to follow safety precautions. It is also available in small and large amounts. 

8. Permatex 81849-12PK Rust Treatment

Pros

✅Packaged in a spray can

✅Dries quicker compared to others

✅Less acidic

✅Easy application and budget-friendly

Cons

🚫Only comes in small sizes

🚫Not reusable

🚫Painting becomes difficult

🚫Does not prevent new rust from appearing

Specs

    • Weight: 11.1 pounds
    • Dimensions: 11 x 9 x 8 inches

Features

  • Can be used on body fillers and fiberglass 
  • Effective primer 
  • Preventive system 
  • One day to dry
  • Numerous uses

What I Like

Easy to use

The application process is straightforward because you have the option to use a brush or spray. You can just simply apply it and let it do its work. Almost anyone can do this; no experience is needed.

 

Can be used on fiberglass and body fillers

Unlike other products, this can work well with fiberglass and body fillers. It can also use as a primer, and you can paint over it once it all dries up.

What I Dislike

Strong odor

Wear a mask and other protective gear. It’s going to smell bad. I mean, it’s also better to be safe than sorry.

 

Cannot prevent new rust from appearing 

It cannot fully guarantee that rust will not appear again. Further treatment needs to be done. It is also not ideal for exterior metal repairs.

Who Should Buy?

This product is perfect for those who want to get rid of rust on their vehicles or other surfaces. However, considerthat this product comes in small sizes. It might be ideal for small projects.

9. BLACK STAR Rust Converter

Pros

✅Easy application with brush

✅Compatible with any metal surface

✅Inexpensive

✅Perfect for rapid jobs

✅Eliminates rust and transforms it into a polymer resin

Cons

🚫The tendency to be rough on painted surfaces

🚫Not as strong as other products

Specs

    • Quantity: 13 oz.
    •  

Features

  • The coating is made of polymer resin
  • Acts as a primer and a final coat
  • Multiple purposes 
  • Easily dries 

What I Like

Quick-drying

This product only takes at least about half an hour to set in and leaves a small finish. This is ideal for those who are in cold climates since it would typically take longer to dry.

 

Does not come off easily 

It is weatherproof and can withstand different weather conditions. This means you don’t have to worry about it coming off quickly. This would be a big plus, especially if you applied the product to a surface exposed to outside elements.

 

Works as a primer

It is multi-purpose since it does not only act as a converter but as a primer as well, meaning you can paint over it. 

What I Dislike

Expensive and comes in small sizes 

This product is more expensive compared to other products. This is a major bummer, especially since you would need multiple coats. Another downside is that it only comes in small sizes. You might need to buy more than one for you to finish your project.

Who Should Buy?

This product is perfect for car owners, farmers, and others who use things that can rust easily. This can help protect your items as well as surfaces from further damage. Instead of purchasing new items, this is the cheaper alternative.

10. FDC Rust Converter Ultra

Pros

✅Perfect for large areas

✅Professional-grade

✅Immediately stops rusting once applied

✅Both brushing and spraying is possible

✅Dries as quickly as 20 minutes

Cons

🚫Not ideal for small household projects

🚫A considerable amount is required to remove the rust

🚫Pricey

🚫Possibility of damaging the clear coat

🚫Always shake before use.

Specs

    • Weight: 8 pounds
    • Dimensions: 11.69 x 6.02 x 5.94 inches

Features

  • Protects and prevents rust from forming on iron and metal surfaces 
  • Non-toxic
  • Water-based
  • Easy and ready to use
  • You can store it easily
  • Quick-drying
  • Serves as a primer coating for oil-based paint 

What I Like

No thinning required 

You can immediately use the product without thinning. You have the option to use a brush, roller, or spray bottle. 

 

Weatherproof 

This product creates a dark and protective barrier that makes it weatherproof. Upon coating the entire area and leaving it to dry, you may start applying a coat of paint.

 

No scraping needed

The existing rust turns into a coat that seals out moisture. You won’t need to do any more scraping afterward. This saves you a lot of time and effort, which is a plus.

 

Seals out moisture

This product seals out moisture from rain and snow—no need to worry about rust coming back. 

What I Dislike

Should be painted afterward 

You’ll need to paint the surface immediately afterward. Otherwise, it could get damaged. If it suddenly rains, you’ll need to reapply the converter. 

 

Needs multiple coats 

You would need to apply for at least three coats for the converter to take effect. This is probably why it comes in a large size, so that’s something to consider.

Who Should Buy?

This product is perfect for those who are planning to do large projects. Since it comes in a gallon, you won’t have to purchase many cans, unlike other products. 

You can also use it immediately. You won’t need to thin and scrape before you apply. This is perfect for restorations.

Conclusion:

The metal parts of it will always be prone to rust no matter how much you clean and care for it.

But there are things you can do to prevent rust from forming. One of the best is using the right rust converter.

The list above represents the best rust converters in the market.

Each one designed to keep your car free from rust no matter the years or elements it’s exposed to.

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