Composeal Gold 30 Mil Crack Isolation Waterproof Membrane Roll - 250 Sq Ft

Composeal Gold 30 Mil Crack Isolation Waterproof Membrane Roll - 250 Sq Ft

Professional waterproofing and crack isolation membrane for tile, stone, and commercial flooring installations.

The Composeal Gold 30 Mil Crack Isolation Waterproof Membrane is a premium sheet membrane engineered to provide long-lasting waterproofing protection and crack isolation beneath ceramic tile, porcelain tile, marble, granite, natural stone, and brick installations. Designed for both residential and commercial projects, this professional-grade membrane helps prevent substrate movement and moisture migration from damaging finished flooring surfaces.

Roll Specifications

• Coverage: 250 Sq. Ft.
• Roll Width: 5.1 Ft.
• Thickness: 30 Mil
• Application: Waterproofing and Crack Isolation
• Installation Method: Direct bond tile applications using thin-set mortar
• Made in the U.S.A.

Advanced Waterproofing and Crack Isolation Protection

Composeal Gold creates a durable waterproof barrier beneath tile and stone surfaces while helping isolate cracks and minor substrate movement. This dual-purpose design helps reduce the risk of tile cracking, grout failure, and moisture-related damage, making it an excellent choice for bathrooms, showers, kitchens, commercial flooring, balconies, patios, and other demanding environments.

Multi-Ply Reinforced Construction

Composeal Gold features a heat-fused multi-ply membrane system engineered for exceptional durability and performance. Reinforced non-woven polyester layers are permanently bonded to a flexible PVC waterproof core, creating a membrane that delivers excellent adhesion, flexibility, and long-term waterproof protection.

Key Features and Benefits

• 30 mil thick waterproof crack isolation membrane
• 250 sq. ft. professional contractor-sized roll
• Helps prevent tile and stone failures caused by substrate movement
• Provides protection against shrinkage and stress cracks
• Allows direct bonding of tile and stone using thin-set mortar
• Excellent adhesion and long-term durability
• One-step seam installation helps reduce labor time
• Resistant to mildew, fungus, and common construction chemicals
• Suitable for interior and exterior applications
• Flexible membrane accommodates minor substrate movement
• Professional-grade waterproofing protection for demanding projects

Compatible Substrates

• Concrete slabs
• Mortar beds
• Cement backer board
• Exterior-grade plywood when properly prepared
• Approved tile underlayment systems

Ideal Applications

• Ceramic tile installations
• Porcelain tile flooring systems
• Natural stone flooring and wall applications
• Marble and granite installations
• Commercial flooring systems
• Residential remodeling projects
• Bathrooms and shower waterproofing
• Exterior decks and balconies
• Wet rooms and moisture-prone areas
• Kitchen and laundry room tile installations

Crack Isolation Performance

Independent Robinson Floor Tester laboratory testing has demonstrated excellent crack suppression performance. Composeal Gold helps reduce the transfer of substrate movement and shrinkage cracks into finished tile and stone surfaces, contributing to longer-lasting installations and reduced maintenance concerns.

Waterproof Core Technology

The integrated PVC waterproof core is based on proven shower pan liner technology and is designed to help prevent water penetration beneath tile installations. This added moisture protection makes Composeal Gold an excellent choice for showers, bathrooms, kitchens, balconies, and other areas exposed to water.

Installation Benefits

• Fast and efficient installation process
• Compatible with standard thin-set mortar systems
• Suitable for direct bond tile applications
• Helps reduce tile cracking caused by substrate stress
• Professional-grade waterproofing performance
• Designed for long-term durability in demanding environments

Warranty Information

Composeal membranes are designed to provide service for the life of the building. Warranty coverage applies to membrane materials against manufacturing defects and does not cover installation-related conditions.

Made in the U.S.A.

Helpful Resources

• Composeal Gold Installation Guide
• Composeal Gold and Radiant Heat Flooring Systems
• Composeal Waterproofing Videos
• Solution for Types of Concrete Cracks

Shop Related Waterproofing Products

• Waterproofing Membranes
• Composeal Blue Vinyl Waterproofing Membranes
• Composeal Gold PE Crack Isolation Waterproof Membrane
• Composeal Gray Gold Sound Control Waterproof Anti-Fracture Membrane