PURAFLEX PRIMER AP4

SEALANT PRIMER AP4 is an all purpose primer containing isocyanates. It may be used on different substrates (concrete, alumiunium, wood, glass, plastic) to improve the adhesion of PU/hybrid sealants. Seals the porosity of materials such as wood or concrete, thus reducing or preventing problems of bubbling under severe conditions. May also be used as a barrier between sealant and paint to prevent the migration of plasticizers