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Everbuild Black Jack 904 Bitumen Roof Felt Adhesive is a bitumen-based adhesive used to bond roofing felt to most surfaces including metal, concrete, timber and more.
Available in 1 litre, 2.5 litre, 5 litre and 25-litre tins
Ensure that the surface to be repaired is dry and clean and free from all loose debris, rust, dirt, grease, algae and fungal growth with a bristle brush
Where algae and fungi have been present, remove all traces completely and treat the surface with Everbuild Fungicidal Wash to kill any remaining spores, Porous surfaces may be primed with a coat of Black Jack 902 Bitumen Primer
Everbuild Black Jack 904 Roof Felt Adhesive should be brush or mop applied to the surface and left “open” for 15 to 30 minutes (depending upon drying conditions) to develop its full tackiness.
The felt should be placed into the wet adhesive film carefully, rubbing or rolling each section down to ensure maximum contact with the adhesive and ensuring that all air has been excluded. The felt should then be weighted down until the felt has adhered to the surface. Whenever possible, the felt should be unrolled into the adhesive and rolled home with a lighter roller (approx. 25kg).
Used As A Lap Cement
Laps at the edges should be at least 75mm wide and laps at roll ends should be at least 150mm. Laps and final edges should be liberally treated on their underside with Everbuild Black Jack 904 Roof Felt Adhesive and well compacted.
On timber roof structures, the first layer of felt must be nailed down to comply with BS 8217:1994. The second and third layers may be bonded with Everbuild Black Jack 904 Roof Felt Adhesive