MAPEI’s Reinforcing Fabric is a strong, absorbent, flexible, alkali-resistant, polyester reinforcing fabric for optional use with MAPEI’s Mapelastic AquaDefense when installed under ceramic tile or stone on residential and commercial interior applications. Reinforcing Fabric is also for use as a component in MAPEI’s ShowerPerfect ™ shower installation systems.Reinforcing Fabric is ideal for use over substrate areas such as cracks, coves, corners and areas around drains when used with Mapelastic AquaDefense. Reinforcing Fabric provides a durable, reliable barrier to water migration into adjacent areas. It can easily be cut to size with scissors or a razor knife, and has excellent compatibility with all MAPEI cement- or epoxy-based grouts and mortars.