RustBlast - Metal Prep Primer - Metal Etch - Rust Remover

RustBlast – Rust Remover, Metal Acid Etch and Zinc Phosphate Pre-Primer

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RustBlast is a powerful rust remover, zinc phosphate pre-primer, and metal etch. RustBlast effectively dissolves rust, corrosion, metal oxides, and tarnish from most metal surfaces. RustBlast is ideal for removing rust from chrome surfaces.

8oz: $9 |Quart: $20 | Gallon: $38 | 5 Gal Pail: $180

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The best rust sealer ever

Using Rust Blast for over 10 years, no other conversion coating matches the results and protection. The thin viscosity makes it so easy to apply if using a brush and allows it to soak into tiny crevices if dipping the part in the Rust Blast. The phosphoric acid conversion of the ferrous salt is so thin, it is invisible under top coats and even invisible if no top coat is desired. Some of my equipment has been weather exposed for years and shows no rust return on those areas treated. I occasionally buy rusted tools online for pennies because noone else wants rusted stuff, but using Rust Blast and, if needed, scale removal tools or hydrochloric acid, I have a beautiful, rust-free tool in minutes.

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Reviewed by: Michael Spence from Sheridan on 10/6/2025

Works really well!

I used the tank sealer kit for a Vulcan 900 that had sat for four years with fuel in the tank. I did Step 1 once then Step 2. There was still a lot of rust in the tank so I ordered an additional quart of the rust blaster and did Step 2 again instead of straining it and reusing the rust blaster. After that I did Step 3 and it covered the entire inside of the tank and was super hard. I also replaced the fuel pump, cleaned the fuel rail, installed a new fuel line and replaced both injectors. Bike runs like brand new and the seal kit did a marvelous job. The only concern I had was when mixing the sealer I could not get all of the black streaks out of it and mixed it for like twenty minutes. The process is very time consuming but will provide an excellent seal.

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Reviewed by: Thomas O'Connor from Hot Springs, AR on 9/2/2025

rust

product worked as described.. was very happy with it..

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Reviewed by: rayh from crown point on 8/11/2025

Great Rust remover

I've used products of this type before, but this one works a bit better.

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Reviewed by: WCG from Loreauville, LA on 8/11/2025

Does the job well

Does a great job at a little or a lot of rust. Can be used over and over. I usually let things soak longer rather than shorter and does no harm to base metal. Reasonable price and a gallon does a lot.

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Reviewed by: john s from Mccordsville, IN on 7/8/2025

It Works

I used the entire kit on two Honda ATV gas tanks. I followed the instructions, even went further with rinsings. I wanted to be certain that I'd cleared the treatments from the tanks. Because of the structure of the tanks, I did a lot more turnings than what was called for. It takes longer for the sealer to cure than I was led to believe. Be patient. I did have a problem. I assumed that because the sealer is suited from other than metal tanks, that collecting the excess in a plastic cup would be OK. Not So. The excess sealer ate through the plastic cup. It took a quart of acetone to clean up the shop floor.

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Reviewed by: Jim May from Norridgewock on 3/20/2025

Engine bay

I used the cleaner and rust blast. It works great! for cleaning and etching rust. I like the product I will be ordering more in the future.Cleaning the the engine bay preparing to paint it.This was t he just the first application wow.

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Reviewed by: Dano from Minnesota on 12/12/2024

Rust Treatment

I used this product to neutralize/etch rust on an outdoor yard ornament, worked very well

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Reviewed by: Jim from Illinois on 11/1/2024

Rust Blast For the Win

The Rust Blaster worked great to transform the rust on my block to a solid paintable surface to took the Rust Seal and Motor Coater paint like a boss!

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Reviewed by: VMITazman from FALLS CHURCH on 8/21/2024

Great Product

These headers were covered in rust, 1 treatment and all the rust was gone, just a great product.

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Reviewed by: Steve from El Dorado on 7/29/2024

Makes Paint Stick

I always use RustBlast when I am cleaning metal for painting no matter what paint I am using. This is the key to getting paint to stick forever!

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Reviewed by: Trey from Boise, ID on 11/2/2023

Almost amazing.

This product is great and does a very good job at removing rust down to the bare metal. I like the zinc coating it leaves behind. It was very easy to use.

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Reviewed by: Guy Pehaim from Dundalk, MD on 6/4/2023

Great Stuff, shoulda bought the kit.

This is great stuff. Definitely grind and sand before you etch with zinc phosphate ( step 2) . I used steel stick for any repairs. Then painted with this candy safety blue rust stop paint and wow what a difference.

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Reviewed by: Stephen from Saint Helena Island on 12/15/2022

Rust Blast

Great product for rust and corrosion on miscellaneous motorcycle parts including engine tank and fenders. Easy to use with good results.

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Reviewed by: Mugs from Auburn,Me. on 9/27/2022

Rusty fenders

The body filler worked great and hard as a rock When done I used bed liner , looks awesome

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Reviewed by: Jeff from Lawrence Ks on 9/13/2022

transfer tank

great stuff,it took the rust out of the tank.you got to try it.

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Reviewed by: bob from louisville,ky on 8/25/2022

Blast

I had used other KBS products and this one performed better than I expected, I was able to clean the inside as well when I submerged the pipes.

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Reviewed by: A anthony from Houston on 6/8/2022

quick

I've used KBS products before so I expect a good experience again , they ship quick , and have fair prices

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Reviewed by: brokenwrench from Pinckney on 12/9/2021

Rust Blast Works As Advertised

Purchased this product after some online research. Restoring a classic car. Gets the surface rust and grime off bolts and all metal products. Highly recommend!

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Reviewed by: EddyJ from Garnet Valley on 10/5/2021

Trust the 3 Step!

Regret not getting any before or after pictures but I cleaned, prepped and sealed the door sills of my 2000 toyota 4runner underneath the weather stripping because an excess amount of undesired rust had been discovered. My application process could have been made easier with the right tool but that was on me. Once this stuff dried, it is highly scratch resistant which is fantastic considering my feet tend to graze over this area, probably causing the rust in the first place. I'd trust KBS over any other kind of "Paint Over Rust" that's out there. Trust the 3 step process!

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Reviewed by: Steve L. from Portage, IN on 9/15/2021

KBS BLAST

I have used other types of rust remover but I have to say KBS BLAST is a great product

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Reviewed by: Douglas E Maddrill from Naples on 8/6/2021

rust blast

Excellent prep

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Reviewed by: Mike Andrews from Poulsbo on 2/17/2021

metal etch

product working as described so far. Will provide an update after time goes by.

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Reviewed by: Frank Cichra from Butler on 1/27/2021

KBS Works Great

We used the three step system on our 1990 Jaguar XJS fuel tank. The car had been stored for 21 years and never ran. Tank looks like new with a very sound coating inside. Looks better than the commercial restorations costing over $600.

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Reviewed by: Jim Mackie from Bryan on 1/19/2021

KBS Rust remover

Im doing a resto on a 67 fastback needless to say it had been sitting a few years, I tried the KBS rust remover treatment and I was amazed how effective this is! Great product, treat it, rinse and repeat if needed.

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Reviewed by: M.T. Davis from Bluffton on 9/8/2020

Q: Is RustBlast safe if it is gets on wiring, rubber, etc. during the process of using it on a car chassis?

Asked by: Mike - 1/2/2014

A: Yes, as long as the contact is casual and the RustBlast is rinsed off with water, RustBlast should not affect your wiring and rubber components.

Was this answer helpful? 44 of 51 Customer(s) found this Answer helpful.

Answer provided by: KBS Coatings (1/17/2014)

Q: If I have new steel, do I have to let the RustBlast stay wet on the surface for the minimum of 30 minutes or can I do less time?

Asked by: YoYo - 12/4/2014

A: New steel is usually very smooth, so we highly recommend leaving the surface wet with RustBlast for a minimum of 30 minutes so that you have an ideal surface profile when you go to apply the RustSeal. Also, remember to keep the surface temperature as warm as possible (within our temperature guidelines) because the warmer the RustBlast is, the more effective the RustBlast is.

Was this answer helpful? 25 of 28 Customer(s) found this Answer helpful.

Answer provided by: KBS Coatings (12/4/2014)

Q: Can you use RustBlast on aluminum?

Asked by: Mark - 4/27/2015

A: RustBlast works very well on aluminum to etch the aluminum allowing excellent adhesion of paint.

Was this answer helpful? 24 of 28 Customer(s) found this Answer helpful.

Answer provided by: KBS Coatings (4/30/2015)

Q: Do I need to clean off the powdery phosphate prior to coating with paint?

Asked by: Edgar B - 3/30/2020

A: RustBlast is designed to leave behind a dusting of zinc phosphate after rinsed with water and this zinc phosphate aids in the adhesion of any coatings that are applied to the surface.