When you're bringing a project back from bare metal, every product in the stack has to work together -- or it doesn't matter how good any one coat is on its own. Linear High Build Epoxy Primer is built for restorers and DIYers who don't have room for shortcuts: a true 4:1 epoxy (not a hybrid) engineered to carry a panel from bare metal, through body work, and up through final high-build primer over filler -- as one continuous product. In side-by-side testing against 11 competing primers, it came out ahead in nearly every category that matters on a restoration: build, adhesion, corrosion resistance, and sand ability.
The old-school approach -- epoxy over metal, then a spray poly, then a 2K urethane before paint -- stacks three products with three different expansion and contraction rates. Every temperature swing works those seams, and over time that shows up as cracking or phantom waves in the panel. Linear High Build Epoxy Primer replaces that stack with one product used at every stage, so the entire repair moves together through hot days, cold nights, and everything between.
Features & Benefits
- True 4:1 epoxy, not a hybrid - One product covers bare metal, body work, and high-build primer over filler, so the whole repair expands and contracts at the same rate instead of fighting itself through temperature swings.
- Gravimetrically identical color variations - All three colors are weighed to match, so they can be blended in any ratio to hit the exact shade you need without guesswork.
- Done shrinking in 24-48 hours - Cures fast, so you're not chasing sink-back weeks later or second-guessing a panel before paint.
- Highest dry film build in its class - Fewer coats to cover imperfections and less time waiting between coats.
- True 76% solids by volume - 4-6 mils of dry film per coat (1.7 TIP) -- what's actually left on the panel, not an inflated number based on solids by weight.
- Semi-gloss finish with a built-in guide coat - Pinholes and imperfections show up immediately, so you catch them before primer instead of after paint.
- Very easy sanding - Less time and effort blocking each coat.
- Excellent adhesion as a DTM (direct-to-metal) primer - Goes straight onto bare metal with confidence, no extra prep coat required.
- Excellent corrosion resistance - Rust encapsulation and moisture-scavenger properties protect the metal underneath long after the panel is closed.
Available in three colors: Black, Blue, and Grey
Kit includes activator: 5 quarts sprayable
