Profile: Torchtar Membranes & Bitumen Products Pvt. Ltd. is a manufacturer of waterproofing & road surfacing products, expansion joints & sealing, corrosion protection, sealants, and pipe line coatings. Our coal tar primer is used for priming of underground and above ground gas, oil, and water pipelines, to provide an effective bond between metal pipes with subsequent hot applied coal enamel. Bitumen silver paint is a combination of aluminum powder and oxidized bitumen volatile solvents. This is used over old painted surfaces without burning or scraping.