Expansion-joint Add bookmark Solution main 1 Necessary products for this solution Biflex PL SBS modified highly flexible bituminous membrane with a plain surface. Biflex SL SBS modified highly flexible bituminous membrane with a slated surface. weberdry prime WB Cold applied bitumen coating weber seal PS 1000 GG/PG Two-component polysulphide joint sealant Find all our products near you in more than 2000 outlets Find a stockist