ALSAN® PATCH is a waterproofing product composed of high polymers for repairing purposes only.
Partial repair of roof waterproofing, non-trafficable terraces, cornices, gutters, chimney stacks, piping, etc... Repair is immediate, with an elasticity of up to 1300 %, excellent resistance to foul weather, mineral acids (max. conc. 10%), contains no bituminous product, excellent adhesion on a wide variety of decks.