What is Bitulen® SK374
Bitulen® SK374 is a preformed waterproofing membrane for use both above and below grade with concrete, brickwork and blockwork constructions.
All surfaces shall be wood trowelled, free from dust or loose materials and dry. Where surface is not smooth, it should be rendered to provide an even surface.
All surfaces shall be primed with a bituminous primer and allowed to dry tack-free before the membrane can be laid. The membranes shall not be installed on site where the ambient temperature is below 5 °C.
After removing the release paper, the membrane is then pressure bonded to the primed substrate. Apply pressure from the centre to prevent air being trapped. All laps shall be 65 mm wide.
The membrane shall be protected with a layer of screed for the horizontal surface as soon as possible after installation. For vertical surfaces, the waterproofing membrane shall be protected by a 25 mm thick expanded polystyrene board before backfilling.
Care shall be taken so as not to damage the membrane after installation.
|Tensile strength||>=4.2 N/mm2 (long.)||SS 374|
|>=4.2 N/mm2 (trans.)||SS 374|
|Elongation at break||>220 % (long.)||SS 374|
|>220 % (trans.)||SS 374|
|Tensile shear at joints||>=350 N||SS 374|
|Resistance to leakage at joints||Passed||SS 374|
|Hydrostatic test||Passed||SS 374|
|Water vapour transmission||<= 0.05 g/m2/h||SS 374|
|Water absorption||0.153 %||SS 374|
|Dimension stability||+0.05 % (long.)||SS 374|
|+0.04 % (trans.)||SS 374|
|Softening point||98 °C||DIN 52001|