Bituthene Liquid Membrane: 1.5 Gallon Pail


  • Fillet material at inside corners
  • Reinforcement material at inside corners
  •  Flashing material around drains, protrusions, curbs and parapets
  •  Sealing material at terminations
  •  Repair material for defects on concrete surfaces
  •  Flashing material at corners

Technical Data Sheet

Safety Data Sheet

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Bituthene Liquid Membrane: 1.5 Gallon Pail

Bituthene Liquid Membrane is a two component, elastomeric, cold applied, trowel grade material designed for a variety of uses with the GCP waterproofing systems. The VOC (Volatile Organic Compound) content is 10 g/L. Architectural and industrial maintenance regulations limit the VOC content in products classified as architectural coatings. Refer to Technical Letters at for the most current list of allowable limits.

Surface Preparation

All surfaces must be dry and free from dirt, grease, oil, dust or
other contaminants. Bituthene Liquid Membrane may be applied at
temperatures of 25°F (-4°C) or above. Store in a dry place above


As a fillet material, 1 gal (3.8L) will cover approximately 100 linear feet (30m). As a flashing material, 1 gal (3.8L) will cover approximately 17ft2 (1.6m2). As a fillet and reinforcement, 1 gal (3.8L) will cover approximately 14 linear feet (4.3).


Add the entire contents of the Part B container to Part A and mix for 3 to 5 minutes until uniform. Part A is black and Part B is clear. Take care to scrape material from the side and bottom of the containers to ensure thorough mixing. A low speed (150 rpm) mechanical mixer with flat paddle blades is required. Do not apply any material if streaks can be seen due to insufficient mixing. Once mixed, Bituthene Liquid Membrane must be applied by trowel within 1.5 hours. More time is available at lower temperatures. At high temperatures, thickening and curing will be faster. Material that
has thickened must be discarded. The material will cure to a very
flexible rubber-like material. Bituthene Liquid Membrane must be applied at a minimum thickness of 3⁄in. (2.3 mm) unless otherwise noted on details. 32
In fillet applications, the face of the fillet should be a minimum of ¾ in. (20 mm). In corner flashing application details, it should extend 6 in. (150 mm) in each direction from the corner. Bituthene Liquid Membrane will adhere to primed or unprimed concrete.


Clean tools and equipment with mineral spirits before Liquid Membrane has cured. Mineral spirits is a combustible liquid and should be used only in accordance with the manufacturer’s safety recommendations. Do not use solvents to clean hands or skin.


Bituthene Liquid Membrane is completely compatible with Bituthene, Preprufe and Procor, and with existing asphalt or coal tar-based waterproofing materials. It is also compatible with cured silicone and polyurethane sealants. It is not compatible with creosote, pentachlorophenol, linseed oil or polysulfide-based sealants.

Weight 18.60 lbs
Dimensions 12 × 12 × 12 in