Custom Shop Black Epoxy Primer/Sealer 2.1 VOC Anti-Corrosive Kit

In this review of the Custom Shop KEP Series Black Epoxy Primer/Sealer, the bottom line is simple: it is a capable, DTM epoxy primer kit for users who need strong corrosion resistance and broad substrate adhesion. The reviewer finds it particularly useful for automotive restorers and metal fabricators because it offers a 1 to 1 mix ratio, fast tack time, and proven adhesion to bare metal, aluminum, fiberglass and properly prepared OEM finishes. The kit is best chosen when salt spray resistance and lead/chromate-free anti-corrosive protection are priorities.

Key Features

• 1:1 Mix Ratio: The simple one-to-one mix makes measuring fast and helps avoid wasting product while maintaining consistent performance.
• Direct-to-Metal Ready: Formulated for DTM use so it bonds well to bare steel, bare aluminum and other uncoated substrates without extra primers.
• Anti-Corrosive Additives: A rich blend of corrosion inhibitors gives extended protection against rust and improved salt spray resistance for exposed parts.
• Lead and Chromate Free: Modern formulation avoids heavy metals while still delivering industrial-grade primer performance.
• Fast Dry and Good Sealer: Fast drying properties and compatibility as a sealer mean basecoat or single-stage urethane topcoats can be applied over it.
• Wide Compatibility: Designed to be topcoated with major automotive paint systems and to provide excellent gloss holdout for topcoats.

Who It's For

The KEP Series epoxy primer is aimed at automotive hobbyists, collision repair shops and industrial users who need a reliable DTM epoxy with corrosion protection and broad adhesion. It suits projects where a user wants a strong sealer that accepts urethane single-stage or basecoat/clearcoat systems and where simplicity of mixing is valuable.

It may be less suitable for someone who needs a very thin, ultra-fast spray primer for small touchups or who cannot tolerate any variability in sprayability or drying times; some customers report mixed experiences with thickness and drying behavior, so those needing absolute consistency for fine-detail spray work should test before committing to large jobs.

Pros & Cons

Pros

• Easy 1-to-1 mixing reduces measuring errors and speeds preparation.
• Strong adhesion to bare metal, aluminum, fiberglass and properly prepared OEM finishes.
• Lead and chromate free with a dedicated anti-corrosive formulation and good salt spray resistance.

Cons

• Customer reports show mixed experiences with thickness and sprayability, so some adjustment of reducer and technique may be required.
• Drying time can feel slow on large panels in cool or humid conditions despite the product being described as fast dry.

Specifications

Brand	Custom Shop
Product Type	Anti-Corrosive Epoxy Primer/Sealer Kit
Mix Ratio	1 to 1 (by volume)
Pot Life	Approximately 4 hours once mixed
VOC	2.1 lbs/gal
Available Colors	Gray, Black, White
Intended Use	DTM - automotive and industrial substrates

Our Verdict

The Custom Shop KEP Series Black Epoxy Primer/Sealer is a practical, cost-effective choice for restorers and shops that need solid corrosion protection and versatile adhesion in a simple 1:1 kit. It is good value for projects that require a DTM epoxy sealer that can take urethane topcoats, though users should anticipate some tuning of spray viscosity and drying expectations on larger jobs.

Frequently Asked Questions

Can this be applied directly to bare metal?
Yes. The product is formulated for direct-to-metal use and bonds well to bare steel and bare aluminum when surfaces are properly prepared.

How long is the mixed pot life?
Once mixed it has a pot life of about 4 hours under normal shop conditions.

Can you topcoat this with urethane single-stage or basecoat/clearcoat?
Yes. It is recommended as a sealer for single-stage urethane and basecoat/clearcoat systems and offers good topcoat gloss holdout.