Koster KSK SY 15 Self-Adhesive Bitumen Membrane

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. It is also radon and methane proof. The previously stated application directions are suitable for carrying out radon and methane proof layers.

Fields of Application
Koster KSK SY 15 is suitable for waterproofing horizontal and vertical surfaces of structures and/or structural members according to DIN 18195 such as foundation plates, wet rooms, basement floors, balconies, terraces, etc. Also suitable for waterproofing polystyrene elements.

Substrate
The substrate has to be clean, dry, even, and without sharp corners, ridges, gaps, or voids. It can be mineral, polystyrene, or wooden. In case of basement walls made of masonry, the joints have to be closed flush. As a primer a thin coat of Koster KBE Liquid Foil is applied to the substrate (Consumption: approx. 250 – 500 g / m²). Alternatively, Koster Bitumen Primer (on old bituminous layers), or Koster Polysil TG 500 can be used for priming. The priming layer must be allowed to dry completely.

Apply the membrane on the same day. In case of strongly absorbent substrates, (e. g. porous concrete), a second primer coat may be necessary. At wall / floor, wall / wall junctions and on offset foundations, fillets with
a leg length of 4 – 6 cm must be installed using a cement mortar such as Koster Repair Mortar. It must be fully cured before the Koster KSK SY 15 membranes are installed, (min. waiting time: 24 hours).

Size
1.5 mm x 1.05 m x 20 m. (21 m² roll)