SOPRAMASTIC is a black mastic composed of SBS modified bitumen, fibres, mineral substances and solvents. It is an ideal complement to bituminous waterproofing membranes as joint filler and caulking material. It is compatible with bitumen-based materials and has excellent waterproofing properties. SOPRAMASTIC is an all-purpose mastic formulated with a high content of polymer to resist flow at high temperature, and designed to be easily applied at temperatures reaching -10 ??C
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