The most important type of epoxy varnish is epoxy polyamide varnish, which has multiple uses and can be used as a sealer, primer, and finish coat for top coats.
When used as a sealer on concrete surfaces, it can fill the pores on the surface, form a good foundation for subsequent coatings, and bind concrete dust to avoid damage to the bond .
Epoxy varnishes can be used as primers for composites. After the carbon fiber composite material is formed, the surface is polished and cleaned, and the polyurethane topcoat can be directly sprayed after spraying the varnish. FRP can also be primed with an amine-cured epoxy varnish before topcoating.
