Wallrock Dampstop Thermic is a completely new, technically superior, zero paper and zero tar content liner. Instead of using paper-based material, it utilises a very tough, strong, rot-proof and salt-resistant polypropylene backing that will give a long service life which is bonded to a water-resistant composite metallic barrier. Wallrock Dampstop Thermic will help alleviate the appearance of penetrating damp on internal walls, but we always recommend the root causes are investigated and dealt with. For example, penetrating damp can be caused by blocked gutters and downpipes, poor external wall condition, failing damp proof course and other local factors. Use with Wallrock Dampstop Thermic adhesive, 1KG of adhesive is sufficient for one roll.