Thompson's Emergency Roof Repair Mastic 750ml - Black Thompson's Emergency Roof Repair Mastic is a trowel applied mastic with the ability to adhere to virtually any roofing material even underwater. With added fibres and a high solids content, Thompson's Emergency Roof Repair Mastic has been developed for filling, plugging and repairing cracks and splits, targeting leaks at the source of the problem. Thompson's Emergency Roof Repair Mastic is an all weather solution, its hydrophobic formula actively repels and displaces water during and after application instantly forming a watertight seal that does not require time to cure before it delivers full weatherproofing protection. Will adhere to virtually any material even under water. Ideal for repairing large holes or gaps in flat roofs. It fills and bridges gaps leaving a watertight repair, even in heavy rain or under ponding water. Suitable for use on: All types of roofing including felt, asphalt, slate & tiles Can be applied in wet weather Dries immediately Deliver a watertight seal
How To use: Preparation- If it's raining: Brush away any ponded water from the area of repair.
If it's dry: Get rid of any dust or dirt with a stiff bristle brush. Repair any structural faults, if needed.
Application: Use a trowel or pallet knife to work the mastic into the repair.
For small cracks & holes: Pack the repair with a thick layer of the mastic. Make sure you cover the whole area plus about 10cm around it.
For larger cracks & voids: Use a scrim bandage to reinforce the repair. Put a thick layer of the mastic over the repair and then embed the bandage into the coating. Complete the repair by covering the whole area, plus about 25cm around it.
Clean up: Clean all your equipment with white spirit.
