Products : Shower Installation Systems : RedGard® Fabric Membrane System : RedGard® Fabric Membrane Drain Gasket

RedGard® Fabric Membrane Drain Gasket

RedGard® Fabric Membrane Drain Gasket is a waterproof fabric sheet designed to transition from the RedGard Fabric Membrane Sheet to a standard clamping shower drain.

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  • Waterproof transition from RedGard Fabric Membrane Sheet to standard clamping drain.
  • Helps prepare showers and other wet areas for tiling.
  • Suitable for all tile types.
  • For information on steam showers, contact Custom's Technical Services department.


Applicable Standards

RedGard Fabric Membrane meets the American National Standard for Load Bearing, Bonded, Waterproof Membranes for Thin-Set Ceramic Tile and Dimension Stone Installations (ANSI A118.10) and evaluated by ICC-ES (Report No. PMG-1188).

Conformance to Building Codes

Installation must comply with the requirements of all applicable local, state and federal code jurisdictions.

Composition of Product

2-sided polyester fleece laminated polyethylene sheet membrane

Suitable Tile Types

All types including impervious porcelain, ceramic tile, natural stone and glass tiles.

Suitable Substrates

  • Cement mortar bed
  • Pre-formed shower slope

Health Precautions

RedGard Fabric Membrane installation requires the use of dry-set mortar. When applying mortar, wear rubber gloves and eye protection. Avoid eye contact or prolonged contact with skin and wash thoroughly after handling. If eye contact occurs, flush with water for 15 minutes and consult a physician. Wash thoroughly after handling. Do not take internally. Keep out of the reach of children.

Limitations to the Product

If tile or stone will not be set immediately after curing, protect the application from rain, direct sunlight and inclement weather for 72 hours after application. If delays longer than 72 hours are expected, cover the area with felt paper. Care should be taken to prevent the application from becoming soiled or punctured during and after application. Membrane installation requires the use of dry-set mortars approved for use in showers.

Application of Product

All surfaces must be clean, smooth, and capable of supporting the finished tile installation. The thin-set mortar used for installing RedGard Fabric Membrane must be appropriate for the substrate. Shape mortar bed to the perimeter of the drain to support the RedGard Fabric Membrane Drain Gasket.

Drains: The RedGard Fabric Drain Gasket can be used at any drain opening. Measure and cut out a hole in the center of the drain gasket to accommodate the opening. The hole can be enlarged in the field with scissors or a knife if needed. The hole in the drain gasket seal should be tight around any protrusions. Fill any gaps or openings with Custom Shower Installation Systems Sealant (Polyurethane) for a watertight seal. The drain gasket should overlap the primary RedGard Fabric Membrane by a minimum  of 2". Bond the membranes together with polymer-modified mortar. Make sure that the drain gasket is securely clamped to the drain.

Curing of Product

RedGard Fabric Membrane may be tiled as soon as it is installed. Flood testing should not occur sooner than 24 hours in moderate temperatures after installation of membrane to allow mortar to dry.

Cleaning of equipment

RedGard Fabric Membrane installation requires the use of thin-set mortar. Make sure to clean tools and hands with water before the material dries. Clean all spray equipment immediately after use.

Product Maintenance

Properly installed product requires no special maintenance. Do not use as a wear surface.

Ordering Information



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