Koster KSK SY 15 consists of a highly tear resistant,
2-layer cross laminated polyethylene foil with a plastic
bitumen / rubber adhesive and sealing compound.
It is cold applied and therefore no hot air or propane
gas welding is required for application. Due to its high
ductility it can easily be applied to difficult details.
The sealing membrane is highly flexible, immediately
waterproof, resistant to driving rain, and crack
bridging. Koster KSK SY 15 is also radon proof.