Mapelastic WP is a premixed, liquid-rubber vapor retarder and quick-drying waterproofing membrane for installation under manufactured stone veneer units and thin brick. Mapelastic WP provides a thin, continuous barrier to protect substrates and building wall assemblies from water damage. Mapelastic WP dries after about 30 to 50 minutes and is then ready to receive any MAPEI polymer-modified mortar meeting or exceeding the ANSI A118.4 or A118.15 standard. Mapelastic WP itself exceeds ANSI A118.10 and A118.12 standards.
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