HYDRA-LOCK: Waterproofing Crack Isolation Membrane

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3.5 Gallon Unit: 3.5 gal. pail (13.25 L), 48 pails per pallet

3.5 Gallon Unit: 250 sq. ft

PROFLEX® Hydra-Lock is a thin, load bearing membrane composed of a modified elastomeric copolymer. With excellent elongation properties and high strength, Hydra-Lock provides a 100% waterproof membrane coating while limiting the transfer of substrate cracks to the finished overlay. The membrane is installed in a liquid state and can be applied to practically any form or irregular shape (i.e. base flashings, parapets, walls, etc.).


  • Low VOC
  • Interior or Exterior
  • Built-in antimicrobial for mold and mildew resistance at the substrate
  • Fast-drying, foot traffic in 4 – 6 hours
  • Installs quickly, cures in 2-4 hours (70° F, 50% R.H.)
  • Easy to use; can be applied by trowel, airless sprayer, paint brush or roller
  • Crack Isolation up to 3/8″
  • Adheres to all common surfaces
  • Thin section that does not interfere with elevations
  • Exceeds ANSI A118.10 and A118.12 membrane requirements
  • May be turned up for base flashing and applied to walls for wainscot or shower wall application.
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