USG Durock™ Brand Liquid Waterproofing & Crack Isolation Membrane is a high-performance, ready-to-use acrylic polymer-based membrane designed for interior tile and stone installations. Engineered for use over properly prepared substrates—including concrete, cement board, and masonry—this low-permeance membrane delivers exceptional waterproofing and anti-fracture protection up to 1/8" substrate movement. Its quick-drying formula and compatibility with ANSI A118.10 and A118.12 make it a professional-grade choice for wet area applications like showers, steam rooms, and backsplashes.
Key Features & Benefits
- Dual Certification: Meets ANSI A118.10 for waterproofing and A118.12 for crack isolation.
- Low Permeance: Perm rating of 0.12 per ASTM E96 (Method E)—qualifies as a vapor retarder in steam showers.
- Flexible Film: Bridges substrate movement up to 1/8" (3 mm) for superior anti-fracture protection.
- Rapid Dry Time: Dries in approximately 1–2 hours per coat under standard conditions (73°F, 50% RH).
- Roll-On Application: Apply with roller, trowel, or brush—no mixing required.
- Tile-Ready Surface: Bonds with modified or unmodified thin-set mortars.
- VOC-Compliant: Low VOC formulation for safe indoor use.
Specifications
| Type | Acrylic-Based Liquid-Applied Membrane |
| Use | Interior Wet Areas, Steam Rooms, Showers |
| Crack Isolation | Up to 1/8" (3 mm) |
| Perm Rating | 0.12 (ASTM E96, Method E) |
| Dry Time | 1–2 hours per coat (73°F / 50% RH) |
| Color | Bright Blue (Dries to Blue) |
| VOC Content | <1 g/L (Low VOC) |
| Packaging | 1 Gallon & 3.5 Gallon Buckets |
| Certifications | Meets IAPMO & ICC-ES Standards, UPC Listed |
Get long-lasting, code-compliant waterproofing performance with USG Durockâ„¢ Liquid Waterproofing & Crack Isolation Membrane. Trusted by contractors for fast installs and durable results. Order today and protect your tile installations the professional way.
