Roscoflamex PA is a clear, un-pigmented additive for creating a flame retardant paint layer. Add one full jar of Roscoflamex PA to a US gallon (3.79L) of water based paint to make your paint coating flame retardant. Roscoflamex PA is compatible in most latex or vinyl acrylic paints but always test with your specific paint choice. Do not use Roscoflamex PA with metallic paints as the metal pigments may react and tarnish or corrode. Roscoflamex PA does NOT alter the flammability of the substrate being painted but only adds a retardant treatment that slows the spread of fire along the surface.