Bituminous Primers for Pipes Containing Gilsonite

A primer improves bond between steel and the main coating.

Composition

Gilsonite and/or bitumen dissolved in fast-evaporating solvents.

Benefits

• Fast drying
• Excellent wetting of blasted steel
• Compatible with hot enamels and tapes

Application

Apply a thin, even coat by brush, spray or roller to clean, dry steel.

Why primer is critical

Even the best enamel or tape fails if it does not bond to steel. Primer wets the blasted surface, fills the surface profile and provides a compatible base.

Typical primer properties

Application tips

• Prime immediately after blasting, before rust forms.
• Apply a thin, uniform film; avoid puddles.
• Allow solvent to flash off before applying hot enamel.

Gilsonite benefit

Gilsonite gives the primer a firm, non-tacky film that resists dust pick-up and bonds well with hot enamels.

See pipe coating grade gilsonite. Related: bitumen enamel.