BÖRNER K-MS 170/4000 is a polyester based Underlay saturated and coated with high quality SBS modified bitumen. The membrane is protected with thermofusible film on its lower side and fine-grained sand on the upper side, making the membrane suitable for both Torch – On and Hot or Cold mastics application.
Materials can be used as underlays in built up waterproofing systems or as vapour barriers on new built or refurbished flat roofs as well as part of overlay systems to existing asphalt waterproofing. Not recommended for use as single ply waterproofing.
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