Everbuild Black Jack 904 Bitumen Roof Felt Adhesive 5L

Everbuild® Black Jack® 904 Bitumen Roof Felt Adhesive – 5 L

Cold-applied oxidised bitumen-based adhesive supplied in a 5 L tin. This durable, flexible adhesive bonds roofing felt securely to a wide range of substrates and can also be used as a cold-gritting solution.

Key benefits

• Forms a tough yet flexible film that adapts to temperature fluctuations.
• Provides strong, long-lasting adhesion for roofing felt applications.
• Also suitable as a cold mix for gritting with chippings or gravel.
• Resistant to most salt solutions, dilute acids and alkalis, water, and alcohol.

Typical applications

• Bonding roofing felt to itself, concrete, asphalt, metal, wood, and other common surfaces.
• Sealing felt laps and embedding protective gravel or chippings into the top layer of felt.
• Cold-gritting roofs with slopes of up to 10°.

Usage guidance

• Ensure all surfaces are clean, dry, and free from loose debris.
• Apply by brush or mop; allow adhesive to become tacky (typically 15–30 minutes) before laying felt and rolling to ensure full contact.
• Maintain a minimum lap width of 75 mm for edges and 150 mm for roll ends; apply adhesive generously and compact firmly.
• On timber roofs, mechanically fix the first felt layer per BS 8217:1994, then bond additional layers with this adhesive.
• For gritting: spread adhesive evenly over sections of around 20 m², immediately apply chippings, and brush off excess after 72 hours.
• Clean tools immediately with paraffin or white spirit.

Product details

• Pack size: 5 L tin.
• Colour: Black.
• Chemical base: Aromatic petroleum hydrocarbon (oxidised bitumen).
• Shelf life: Up to 24 months if stored sealed and intact between 5–25 °C, away from ignition sources.

Good to know

Not resistant to oils, solvents, or strong detergents. Porous surfaces should be primed first with Black Jack® 902 Bitumen & Flashing Primer for best results. Check adhesion after 24 hours to confirm proper bonding, especially at edges and laps.