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Bitumen is a substance manufactured from organic liquids that are extremely sticky and viscous. This makes it the perfect substance to use when waterproofing, as it does not absorb water and it moves with the structure.

The product GAST UB7 is a polyester reinforced waterproofing membrane which is fully saturated with a rubber enriched bitumen emulsion and finished with a silver coloured bitumen-aluminum top coat. The use of GAST UB7 holds many advantages namely excellent elongation and elasticity, it is a fully bonded system, good adhesion properties and zero water migration risk. Where a strong membrane with a rubber-bitumen saturant is required, GAST UB7 is the way to go.