Description POLYBIT® POLYPRIME SB is used as a primer and sealer coat prior to the application of bitumen based waterproofing membranes and coatings. Available sizes: 20L. Features and benefits A quick drying solvent based low viscosity bitumen primer. It is used as a primer coat on masonry and concrete substrates to improve the adhesion of bitumen based membranes and coatings. Properties Improves the adhesion of bitumen based sheet membranes and coatings Cold applied, does not require heating Binder for dust particles Binder for dust particles Conforms to ASTM D41 - Asphalt primer for roofing, damp proofing and waterproofing