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Why GAF HydroFiber?

HydroStop HydroFiber Bulking Agent is used in conjunction with either HydroStop PremiumCoat Foundation Coat, PremiumCoat Finish Coat, BarrierGuard Waterproofing, or FlexCoat Wall Coating as a bulking agent. The product is comprised of glass fibers which, when mixed with one of above listed products, will create a thick workable compound. The HydroStop HydroFiber Bulking Agent mixture can be used to fill voids, level surfaces, and create cants, as well as many other uses. The HydroStop BarrierGuard System or HydroStop PremiumCoat System must be installed over any repaired area using this product.