XFasten Waterproofing Membrane Sheet 6” x 75 Ft – Shower Underlayment Tape for Tile & Cement Board

Overview

Meet the XFasten Waterproofing Membrane Sheet, a versatile barrier designed for showers, decks, and hard-to-reach curved surfaces. Sized at 6 inches by 75 feet, it provides a lightweight yet durable foundation for underlayment tile, cement boards, and niche installations, helping you plan with confidence as you prepare for a leak-resistant space.

Flexible fiberglass fabric guards against cracking when bent at tight angles and along seams, and its broad compatibility with popular liquid membranes means you can pair it with widely used systems as part of your bath or outdoor waterproofing plan.

Key benefits

• Multi-use surface protection for shower walls, pans, liners, niches and curbs, plus decks and cement boards
• Broad compatibility with liquid membranes such as Red Guard, Laticrete, and Hydro Ban
• Long-lasting performance rated up to 60 years with zero maintenance
• Anti-fracture design that stays flexible at extreme angles
• Beginner-friendly with mess-free installation and professional-style results

Practical applications

• Ideal for curved shower niches, curb transitions, and pan liners where a seamless seal matters
• Useful behind tile on cement boards and underlayments in remodels or new builds
• Suitable for RV surfaces and other hard-to-reach areas where moisture protection is beneficial

Usage tips and longevity

Prepare and install as part of your waterproofing plan, pairing with your chosen liquid membrane where required. The sheet is designed to resist weather and humidity over time, delivering long-term protection with minimal upkeep. This arrangement supports a clean, professional look while helping you manage moisture control with confidence.