ANTIROCK and ANTIROCK Starter are SBS-modified bitumen membranes designed to waterproof bridge decks. ANTIROCK is composed of a proprietary formulation of elastomeric styrene-butadiene-styrene (SBS) polymer modified bitumen and is reinforced with tough, dimensionally stable non-woven polyester mat. The topside is surfaced with ceramic coated granules and the underside is surfaced with polyolefin burn-off film to facilitate heat welding. ANTIROCK Starter is used as a starting membrane for ANTIROCK and has a with a selvage of 3 in (75 mm) on each side.

Product Properties

  • Components Cap Sheet


ANTIROCK AND ANTIROCK Starter are mechanically fastened (Macaden, Mini-Macaden) or heat-welded with a propane torch. They must be installed by thermofusion on dry and clean surfaces previously primed with ANTIROCK Primer or ANTIROCK Emulsion Primer. Side lap joints must be a minimum of 3 in (75 mm) and end lap joints must be minimum of 6 in (150 mm). Decks that are to be waterproofed with membrane must conform to the specified surface profile (CSP) of 3-5 of the International Concrete Repair (ICRI). Shotblasting is recommended over the entire surface. Refer to SOPREMA’s ANTIROCK specifications for additional application guidelines.


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