HydroFiber Bulking Agent

HydroFiber Bulking Agent

Why HydroStop® HydroFiber Bulking Agent?

HydroStop® HydroFiber Bulking agent is comprised of pumice fibers which, when mixed with PremiumCoat® Foundation Coat, PremiumCoat® Finish Coat, BarrierGuard® Waterproofing System, or FlexCoat Wall Coating, creates a thick workable compound. It is simple to apply and mixes easily with air-generated mixers.


  • The HydroFiber mixture can be used to fill voids, level surfaces, and create cants, as well as many other uses.
  • Excellent for flashing details Easily mixed with air-generated mixers.
  • Simple application.


The HydroFiber mixture is used as a bulking agent over metal, concrete, lightweight concrete, single-ply, TPO, PVC, EPDM, asphalt, built-up roofing, modified bitumen, wood, and rubber substrates.


Product Properties

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