Gaco Flex E5320 2 Part Epoxy Primer Filler Part A 5 Gallon

GacoFlex E5320 (Part A) is one part of a two-component, water-based epoxy primer that is ideal for use on most roofing surfaces including metal roofs and flashings. The second part, GacoFlex E5320 (Part B), must be purchased separately. A kit containing 2 one-gallon cans of (respectively) Part A and Part B is also available. See "related items" below.

This easy-to-apply primer bonds to properly prepared roofing surfaces and improves the adhesion of GacoFlex silicone coatings and other topcoats, especially on weathered surfaces that are difficult to get completely clean.

On asphalt-based surfaces, it may help prevent bleed-through, and when top coated will help prevent corrosion. When mixed with ordinary sand, it's a masonry block filler.