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    GCP offers advanced waterproofing membranes and technologies for virtually all above- and below-grade commercial applications. Our brands, Bituthene®, Preprufe®, Procor®, Hydroduct®, and Adcor®, include self-adhesive sheet-applied and fluid-applied waterproofing membranes, drainage composites and waterstops. GCP has expanded its portfolio with the addition of De Neef, offering preventative and remedial waterproofing, concrete protection and repair products.    
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