MasterSeal 622 - A bitumen/rubber latex emulsion – surface applied, flexible, damp and vapour-proof liquid membrane

Formerly Masterseal 422


MasterSeal 622 is a brown rubber/bitumen liquid emulsion with excellent adhesion, which dries to a tough black seamless, flexible waterproof and vapour-proof membrane. 

MasterSeal 622 has excellent resistance to water, diluted acids and alkalis, chloride and sulphate ions.

Where is MasterSeal 622 applied?

  • Foundation for tanks and waterproofing structures: to provide an impervious waterproof membrane on concrete and brick 
  • Floors: to provide a sandwich membrane in new construction or a surface treatment 
  • Walls: for interior and exterior walls 
  • Roofs: for the maintenance of many types of roofs including built-up felt, asphalt, lead, zinc, aluminium, concrete, lightweight screeds, timber, slate, asbestos cement, corrugated iron and as a vapour barrier 
  • As an adhesive: for bonding wood blocks and wood mosaics, insulation board, expanded polystyrene, and cork tiles. 
  • General damp proofing of concrete foundations that are in contact with groundwater

Product Information


MasterSeal 622

pdf (304,89 Kb)

MasterSeal 622 MSDS

pdf (164,19 Kb)