Choosing a Bituminous Waterproofing Primer

Primers improve adhesion of membranes and coatings.

Types

• Solvent-based (fast drying, deep penetration)
• Emulsion-based (low odour)

Gilsonite primers

Excellent wetting and fast drying.

What a primer does

A primer penetrates the pores of concrete or masonry, binds dust and creates a bituminous surface that the next layer can bond to. Without primer, membranes and coatings can peel.

Choosing a primer

Application

• Apply on clean, dry substrates.
• Use a brush or roller to work the primer into pores.
• Do not over-apply; a thin, even coat is best.
• Allow to dry fully before torching or applying hot compounds.

Why gilsonite primers

Gilsonite gives fast drying, good wetting and a firm, non-tacky film that does not pick up dust before the next layer.

See waterproofing grade gilsonite.