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  • Fusion Self Etch Primer


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Product Description

This incredible all-purpose self-etching-primer is ideal for promoting adhesion between multiple surface coatings (including applications of topcoats or primers over cured RustSeal) in addition to priming bare metals such as steel, brass, aluminum, and most hard plastics.



Fusion Overview


Looking for a FAST drying and easy-to-apply inter-coat primer that allows you to quickly topcoat RustSeal or any other basecoats? We have exactly what you need ... FUSION!


Fusion is an all-purpose self-etching primer ideal for promoting adhesion between multiple surface coatings, including applications of topcoats and primers or over fully cured RustSeal. Fusion is also excellent for priming bare metals such as steel, brass, aluminum and most hard plastics.


Fusion allows you to topcoat over a smooth rock hard RustSeal surface that’s been in place for months or years! Just lightly sand the surface using 280-320 grit sandpaper before applying a thin covering coat of FUSION then topcoat as desired.


Fusion can be sprayed or brushed on almost any painted surface and is ready for a topcoat in 1 hour. Fusion is available in a convenient aerosol as well as pints, quarts and gallons. Satisfaction guaranteed!

Fusion Features

  • All-purpose inter-coat self-etching primer
  • Promotes adhesion to almost anything
  • Bonds to fully cured RustSeal
  • Ready to topcoat in 1 hour
  • Direct to metal

Please Note: Fusion is not a high build primer.

Fusion Coverage

  • Aerosol of Fusion will cover 35 sq. ft.
  • Pint of Fusion will cover 50 sq. ft.
  • Quart of Fusion will cover 100 sq. ft.
  • Gallon of Fusion will cover 400 sq. ft.
  • 5 Gallon Pail of Fusion will cover 2000 sq. ft.

Fusion Directions


Fusion Self-Etch Primer is an all-purpose self-etching-primer ideal for promoting adhesion between multiple surface coatings (including applications of topcoats or primers over cured RustSeal) in addition to priming bare metals such as steel, brass, aluminum, and most hard plastics.



Recommended temp application range is 55-82ºF (13-28ºC).

Clean & dry all surfaces to be etched or primed. KBS Klean, a water-based cleaner/degreaser, is recommended if cleaning is required.

For bare metal surfaces, clean with KBS Klean before applying a single covering coat.

Fusion may be applied by brush, roller or sprayer.

Always apply thin, covering coats.

A single coat is generally all that is required but you apply additional coats as needed.

Thinning is not generally required, however, KBS #1 Thinner may be used if needed.

For brush, roller or sprayer applications, stir can very well before and during use.

For aerosol application, shake can until mixing ball moves freely for a minimum of one minute. Hold nozzle 10-14 inches (25-32cm) from surface to be coated.

A single light coat is generally all that is required but you can apply additional coats as needed. When needed, apply 2 to 3 light to medium coats allowing a 3 to 5 minute dry time between each coat. Apply using steady and even strokes. Product will be dry-to-the-touch in 15 minutes. Allow one hour dry time before sanding, priming or top-coating. No need to sand if coated over within 24 hours.

IMPORTANT: Clean spray head immediately after use by turning can upside down and spraying until no more paint appears. If clogging occurs, remove spray head and clean with a fine wire. Replace carefully, pointing can and spray head away from you.

Allow 1 hour for Fusion to dry before applying BlackTop, KBS MAXX , KBS Top Coater, KBS Top Coater Aerosol or another topcoat or primer.

Always coat over Fusion within 7 days. If you want to apply after 7 days, scuff the Fusion with 300 grit.

Questions and Answers

Q: I have a truck frame that still has a lot of factory paint still on it that I know won't last very long. Do I need to strip all the paint off first or and can I go over it with the self etching primer and then coat it with rust seal?

Asked by: Travis - 3/8/2014
A: It would be best to strip off the old coating, but it is not necessary. The best rust protection is always achieved by applying RustSeal to properly prepped metal. But, if you have do not want to strip off the old coating, you can clean the old coating with KBS Klean and scuff it up with 300 grit and then apply RustSeal.
Answer provided by: KBS Coatings (3/14/2014)

Q: I have to paint some brass objects (2 will be white & 2 will be black). I was reading that the first thing I need is self-etching primer. Will this work to paint brass these colors?

Asked by: Diane Smith - 2/10/2014
A: Yes, the Fusion Self-Etch Primer will stick to brass and get the brass surface ready for your white or black paint.
Answer provided by: KBS Coatings (2/10/2014)

Q: what color is the fusion primer?

Asked by: Dan - 7/23/2014
A: The Fusion Self-Etch Primer is red in color.
Answer provided by: KBS Coatings Sales (2/14/2020)

Q: After using the self-etching primer can I use a enamel paint and clear?

Asked by: James - 2/26/2015
A: Yes, you can coat over Fusion with Motor Coater Engine Enamel and then a clear coat like our DiamondFinish Clear. Just let the Fusion cure for 30 minutes and then apply the Motor Coater over the cured Fusion.
Answer provided by: KBS Coatings (2/26/2015)

Q: What color is the Fusion aerosol self-etching primer?

Asked by: James Otis - 5/2/2015
A: Fusion Self-Etch Primer is a medium grey in color.
Answer provided by: KBS Coatings (5/5/2015)

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Product Reviews

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  1. lays down great

    Posted by Reviewed by: Greg L from pace,florida on 1/2/2014 on 14th Feb 2020

    goes on smooth and covers rust seal perfect

  2. Great adhesion

    Posted by Reviewed by: adam from lake ronkonkoma, ny on 6/23/2017 on 14th Feb 2020

    I built a welding table this year and top coated it with there product but they recommend putting this primer on first for best adhesion. I followed the direction to the t and found they were right it is a very tough strong primer well worth the price. I top coated it and have hammered on it welded on it and still no issues. thanks for the advice guys.

  3. Great Primer

    Posted by Reviewed by: Michael D from Mason City, IA on 3/13/2019 on 14th Feb 2020

    Made applying MAXX over Rustseal so much easier in the hard to reach areas. Really bit into the Rustseal.

  4. product

    Posted by Reviewed by: m&jauto from faifax ia on 3/27/2019 on 14th Feb 2020

    I love your product it does every thing I want

  5. Great for new aluminum

    Posted by Reviewed by: Ben from Mt Orab, OH on 6/19/2019 on 14th Feb 2020

    I used this primer on new mill finish aluminum sheet and top coated it with MAXX. Worked great! Easy to spray (I'm not a painter by any means! ) definitely will use again!

  6. Good primer

    Posted by Reviewed by: Brad Maxwell from Thornton on 7/23/2019 on 14th Feb 2020

    Used this on a few projects. Works as advertised and seems to work well for my needs.

  7. It Sticks!!!

    Posted by Reviewed by: Steve from Tanner WA on 8/16/2019 on 14th Feb 2020

    Getting paint to stick to brass & copper was impossible until I started using KBS Fusion - Self-Etching Primer. My live steam locomotives have lots of tubing & fittings, & until I started using Fusion, the paint simply rubbed off, now thanks to Fusion IT STICKS.

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