Bitumen Primer – Low Viscosity for use on Friable Surfaces

Bitumen Primer is a quality grade, highly penetrative, bituminous solution for priming surfaces prior to the application of bituminous materials, self-seal membranes and flashing tapes. Heavy duty formula making it suitable to prime concrete roofs and floors, cementitious screeds/renders, bitumen felt, weathered bitumen, mastic asphalt, weathered, corrugated iron and steel.

All surfaces must be structurally sound, clean, dry and free from surface contaminants such as grease, rust and dirt. If necessary, remove any organic growth i.e. moss or lichen, with a fungicidal wash. On bare metal a rust inhibiting product, such as red oxide or zinc phosphate should be applied and allowed to harden.

You can apply the bitumen primer by brush or roller. Using a brush, scrub the primer into the surface. Ensure that only a thin coat is applied and that there is no pooling. Priming should extend at least 75mm beyond the area to be waterproofed. Leave to dry for 2­-3 hours before continuing with further work.

With fibre cement or dry rag based bituminous felts, apply the bitumen primer generously to saturate the surface.

Drying Time

• Approximately 3-­6 hours depending on drying conditions. May be extended for heavy coatings or in cold weather.

Approximate Coverage 

• 4-10m² per litre (dependant on substrate porosity)

Pot Sizes

• 1 Litre (4-10m²)
• 2.5 Litre (10-25m²)
• 5 Litre (20-50m²)
• 25 Litre (100-250m²)

Technical Data