R-Guard PorousPrep seals the dry, cut edges of gypsum wall boards exposed in rough openings for windows and doors. The sealed edge makes a perfect surface for easy application of R-Guard Joint & Seam Filler or R-Guard FastFlash®.
PorousPrep brushes on easily and efficiently, and its glue-like viscosity reduces rundown and potential for spills. PorousPrep usually dries in 30 to 60 minutes when applied to dry surfaces. Use R-Guard PorousPrep as part of a continuous, building-wide air barrier system, or to complement conventional waterproofing or air barrier components.
Ensures application of Joint & Seam Filler or FastFlash® to dry cut edges of gypsum wall board is fast and efficient.
Glue-like viscosity makes application smooth and easy, while reducing potential for spills and rundown.
No solvent odor.
Treated surfaces “breathe” – does not trap moisture.
Not for use on wet surfaces.
Not for use below grade or in locations which are continuously immersed in water.
Not for use as a structural sealant.
R-Guard PorousPrep is compliant with the US Environmental Protection Agency’s AIM VOC regulations. Visit www.prosoco.com/voccompliance to confirm compliance with individual district or state regulations.
Always read full label and SDS for precautionary instructions before use. Use appropriate safety equipment and job-site controls during application and handling.
24-Hour Emergency Information: INFOTRAC at 800-535-5053