Rawell is extremely proud of its British heritage, it has been manufacturing it`s Rawmat HDB membrane and Rawseal waterstops and since 1993. Rawell are happy to be the only manufacturer of Geosynthetic Clay Liners (GCL`s) in Britain. Rawell have been manufacturing Rawmat HDB and Rawseal products for over 25 years! Rawell are the only prehydrated GCL manufacturer in the world. Rawell are a British company manufacturing their bentonite products in Great Britain. Rawell has established an enviable reputation of supplying high performance products and innovative design solutions across its market sectors both in the United Kingdom and across the world.