- Seals porous, powdery and hard set
- Binds chalky surfaces
- Protects finishes against alkali attack
- Interior and exterior use
A pigmented oil based prepcoat which seals porous surfaces and binds unpainted powdery surfaces such as bare plaster, providing a sound foundation on which to apply subsequent paint coats. It helps protect finishes against alkali attack and is suitable for both interior and exterior use.