Why use butyl to repair a crack in an Asbestos Roof
Foil backed butyl tape is ideal for repairing cracks in asbestos cement roof sheets. Some people use cheap Flashband, but we do not recommend bitumen based products because of the high failure rate and the way it softens in the warmth and cracks in the cold.
Butyl will stay flexible longer, has good adhesion and this version has the protection of the foil layer. This means no topcoat is necessary, saving you time and money.
How to repair a crack in an asbestos roof
Clean surface - keep damp to stop fibres getting into the atmosphere.
Allow to dry.
Apply primer - We reccomend the UV curing primer or AT S Primer for preparing porous surfaces. This is simply a case of brushing onto your asbestos roof.
Apply Foil Backed Butyl Tape.
Apply pressure to enhance adhesion.
No more leaks. Enjoy a watertight roof.
Repairing a valley?
We recomend that you apply tape to the complete length of the asbestos cement roof sheet when repairing the valley of the corrugation. If you only do part, the water can be absorbed, just above the leading edge of the tape, and, over time, start to delaminate that edge. Go to the top of the sheet and butt the end of the tape to the sheet above.