4:1 Polyester Primer Catalyst, Quart

Evercoat 4:1 Polyester Primer Catalyst

The Evercoat 4:1 Polyester Primer Catalyst is a patented, epoxy-enriched hardener engineered specifically to optimize the performance of Evercoat’s complete line of 4:1 polyester primer surfacers, including Super Build 4:1. Designed for professional automotive refinishing, collision repair, and restoration environments, this catalyst delivers superior crosslinking, improved stability, and enhanced application control.

Unlike conventional polyester primer hardeners, Evercoat’s advanced epoxy-enriched formula ensures a more accurate, easier, and cleaner 4:1 mixing ratio, eliminating guesswork and helping technicians achieve consistent, uniform activation every time. This results in stronger film integrity, better cure performance, and reduced risk of shrinkage, dieback, or uneven build.

When used with Evercoat 4:1 primers, the catalyst supports:

• Exceptional filling power and smoother high-build surfacing

• Improved holdout over challenging substrates

• Quicker, more dependable curing for better sanding characteristics

• Excellent adhesion across fiberglass, SMC, bare metal, aluminum, rigid plastics, and body fillers

• Long-term durability backed by the 500-hour ASTM B117 salt spray performance of Evercoat 4:1 systems

Evercoat 4:1 Polyester Primer Catalyst is available in Standard (733) and Fast (734) versions, allowing technicians to tailor the cure speed to temperature conditions, production timelines, and job requirements. Both options integrate seamlessly into the Evercoat 4:1 system and maintain full compatibility with waterborne and VOC-compliant paint systems.

Engineered for professionals who demand reliability, accuracy, and premium results, this catalyst is an essential component for achieving the high-performance characteristics Evercoat 4:1 primers are known for—from superior film build to consistent finish quality.