HYDRA-LOCK Waterproofing Membrane

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% waterproofing membrane coating while limiting the transfer of substrate cracks to the finished overlay. The waterproofing 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.). Similar to Laticrete Hydro Ban. If you are looking for a liquid waterproofing membrane for your installation in Sacramento, San Francisco, Los Angeles,  San Diego, Massachusetts, Boston, Worcester, New York, Buffalo, Rhode Island, Connecticut, Hartford, New Jersey, Jersey City, Newark, Manchester, New Hampshire and Vermont please consider Hydra Lock, its less expensive and meets the same ANSI requirements as Laticrete and RedGuard.


Typical Use

Hydra-Lock is for use in commercial buildings, residential housing and other areas requiring positive waterproofing like pools, fountains, spas, hot tubs, kitchens, countertops, balconies, tub surrounds, shower stalls and pans, under terrazzo, quarry, ceramic and stone tile. This membrane can be installed over any sound substrate, vertically or horizontally, interior and exterior.


  • Low VOC
  • Interior or Exterior
  • Crack Isolation up to 1/8″
  • Adheres to all common surfaces
  • Built-in antimicrobial for mold and mildew resistance at the substrate
  • Installs quickly, cures in 2-4 hours (70° F, 50% R.H.)

Suitable Surfaces

  • Brick masonry
  • Cement backer board for interiors only
  • Cement mortar beds
  • Cement terrazzo
  • Ceramic and stone
  • Concrete
  • Exterior grade plywood

Coverages, Packaging

  • 1 Gallon Unit: 1 gal. pail (3.78 l) of Hydra-Lock liquid, 60 pails per pallet
  • 5 Gallon Unit: 5 gal. pail (18.9261 l), 36 pails per pallet
    Shelf Life: One year from manufacturing in sealed original container, when properly stored at room temperature, off the ground in a controlled, dry, heated area.

Companion Products


Data Sheets

Requires Adobe Reader Data Sheet / Installation Guidelines

Requires Adobe Reader Gold Limited Lifetime Warranty 

Warranty based on the system of materials used to install finish flooring products.
Please refer to our full warranty information for specific terms and conditions.