Maxbond BT Primer is a ready-to-use compound of oil bitumen and processing additives for use in substrate preparation to counter the effects of dust and minimize concrete surface porosity. Available in water or solvent based, it enhances bonding of polymer-bitumen membranes, in both hot torch and self-adhesive applications and helps improve the coverage rate of asphalt liquid coating. For use over concrete, masonry, metal and dry wall surfaces.

Design Features Limitations

• High penetrating ability
• Quick drying
• Excellent bond


o Do not add thinners.
o Do not apply over damp surfaces
o Do not apply solvent based primer over plastic foams or solvent sensitive surfaces

Surface Preparation

All surfaces must be clean, dry and free from oils, wax and other contaminants. Metal shall be wire brushed and
free of rust, paint and other coating.

The Installation

Stir Maxbond BT Primer well before use. Apply by brush, roller or spray at a rate of 0.15 – 0.3 liter per m² depending on porosity of the substrate. Use solvent-based primer in well ventilated area and keep away from open flame.
Let the primer penetrate into the substrate and protect from air borne dust. Apply a second coat if substrate is
extremely porous. Allow solvent to evaporate before application of waterproofing membrane.


20 liter pail


Store in sealed original packaging in well ventilated, cool and dry space away from sunlight and heat source.

Shelf Life

24 months

Health & Safety

Wear protective gloves and safety goggles when handling and avoid excessive inhalation. Upon contact with
skin, wash with soap and water. In case of eye contact, flush with water and seek medical attention immediately.
Maxbond BT Primer Solvent-Based contains solvent and is flammable. Do not use near open flame or in
enclosed space without ventilator or breathing apparatus.

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