Check the listing for details. Evercoat 4:1 Catalyst - Polyester Primer Catalyst - Epoxy-Enriched Primer (2/PK). Condition: New. Listed at 94.99 USD. EVERCOAT® 100733 Polyester Primer Catalyst, 946 mL, 4:1 MixingProduct Description4:1 polyester primer catalyst is a patented, epoxy enriched catalyst that provides unsurpassed performance when mixed with EVERCOAT®'s line of 4:1 polyester primer surfacers. It provides end users with an easier mix ratio than conventional polyester primers and provides a more uniform mix. Fast 4:1 polyester primer catalyst is a patented, epoxy enriched catalyst that provides unsurpassed performance in cooler temperatures, when mixed with EVERCOAT®'s line of 4:1 polyester primer surfacers.Features4:1 polyester primer catalyst is a patentedEpoxy enriched catalyst that provides unsurpassed performance when mixed with EVERCOAT® line of 4:1 polyester primer surfacersIt provides end users with an easier mix ratio than conventional polyester