USG Durock Liquid Waterproofing & Crack Isolation Membrane is a ready-to-use acrylic polymer membrane engineered for interior tile and stone installations. It provides low permeance performance for wet areas and continuous-use steam environments, meets ANSI A118.10 and A118.12 standards, and offers anti-fracture protection up to 1/8 inch. Designed for use over properly prepared substrates such as concrete, cement board, masonry, and gypsum-based materials, the membrane dries quickly and forms a flexible, durable film that bonds with modified or unmodified thin-set mortars.
Key Features
- ANSI-Compliant: Meets ANSI A118.10 for waterproofing and ANSI A118.12 for crack isolation.
- Low Permeance: 0.12 perm rating per ASTM E96 Method E for steam room and steam shower applications.
- Crack Isolation: Bridges substrate movement up to 1/8 inch (3 mm).
- Quick-Dry Formula: Dries in approximately 1–2 hours per coat under standard conditions.
- Flexible Application: Apply with roller, trowel, or brush; no mixing required.
- Tile-Ready Surface: Compatible with modified and unmodified thin-set mortars.
- Low-VOC Formulation: Less than 1 g/L for indoor compliance.
- Color Change Cure: Bright blue application color that deepens as it dries.
Specifications
| Specification | Details |
|---|---|
| Type | Acrylic-based liquid-applied membrane |
| Use | Interior wet areas, steam rooms, showers |
| Crack Isolation | Up to 1/8 in (3 mm) |
| Perm Rating | 0.12 perms (ASTM E96 Method E) |
| Dry Time | 1–2 hours per coat at 73°F / 50% RH |
| Color | Bright blue (dries to deeper blue) |
| VOC Content | <1 g/L |
| Packaging Options | 1 gallon and 3.5 gallon buckets |
| Certifications | Meets IAPMO & ICC-ES standards; UPC listed |
USG Durock Liquid Waterproofing & Crack Isolation Membrane provides low permeance waterproofing and ANSI-rated crack protection for interior wet area and steam applications.
