Laticrete MVIS Water Crack Isolation Membrane - 5 Gallon

Overview

MVIS WCI is a single-component, fluid-applied bulk-water-management and crack-isolation layer for the specified masonry veneer system. The self-curing, water-based material forms a seamless elastomeric coating beneath compatible polymer-fortified veneer mortars.

Features

• Helps isolate in-plane movement up to 1/8 in. in the specified assembly.
• Color changes from off-white to white as it cures.
• Microban protects the treated coating.
• Low-VOC, non-flammable formula; exceeds ANSI A118.12.

Specifications

• Package: 5 gallon
• Approximate finished coverage: 250 sq. ft. with two specified coats
• Wet thickness per coat: 15–22 mils
• Total dry thickness: 20–30 mils

Downloads

• Technical Data Sheet
• Safety Data Sheet

Applications

Use in the approved MVIS veneer assembly over load-bearing concrete or brick masonry, cement plaster or appropriately specified cement backer board. It manages bulk water behind the finish but does not function as a waterproofing membrane.

Plan Your Installation

• Have the design professional locate the wall’s air, vapor, insulation and waterproofing layers correctly.
• Do not bridge structural cracks, vertical movement or horizontal movement greater than 1/8 in.
• Do not use below grade, as a primary roof membrane, or beneath directly applied cement/plaster finishes. OSB is not a veneer substrate.
• Apply at 50–90°F and cover within the specified exposure period; use a wet-film gauge to verify coating thickness.

Common Planning Questions

Is WCI interchangeable with MVIS Air & Water Barrier?

No. Its listed functions and assembly requirements differ; WCI is not a waterproofing membrane.