Dryvit HDP Water-Repellent Coating is 100% acrylic, has excellent water repellent properties and is available in standard colors as well as custom colors. Dryvit HDP Water-Repellent Coating is formulated to resist mold and mildew growth (PMR) and is hydrophobic, resulting in less dirt pick up and a cleaner wall appearance. Questions? Contact Us.
HDP Water-Repellent Coating is used to coat acrylic based textured finishes, masonry, stucco, wood, or primed metal.
Drying Time: Drying time of HDP Water-Repellent Coating is dependent on the air temperature and relative humidity. At 70 °F (21 °C), 55% R.H., HDP Water-Repellent Coating is dry to the touch in 1/2 hour and dry to handle or recoat in 2 hours. Always protect work from rain for at least 24 hours.
Beading Effect: The beading effect occurs after approximately 30 days of weathering. This effect is more easily seen on finer finishes.
Testing Information: For individual test data on this product’s properties, refer to the chart included with this document.
Job Conditions: Air and surface temperature for application of HDP Water-Repellent Coating must be 45 °F (7 °C) or higher and must remain so for at least 12 hours.
Surfaces shall be clean, dry, above 45 °F (7 °C) and free of efflorescence, grease, oil, form release agents and curing compounds. On previously coated surfaces, all loose coating and gloss must be removed by sanding.
• Metal Surfaces: Must be primed with a corrosion resistant primer.
• Dryvit Finishes: Freshly applied finishes must dry a minimum of 24 hrs under average drying conditions. Existing Dryvit finishes should be cleaned prior to coating. See DS152 for recommended procedures.
• Concrete and Masonry: Shall have cured a minimum of 28 days prior to application of HDP Water-Repellent Coating. If form release agents or curing compounds are present on the concrete surface, the surface shall be thoroughly washed with muriatic acid and flushed to remove residual acid. All projections shall be removed, joints struck flush, and small voids filled with Genesis DM base coat (DS452). Dryvit Color Prime (DS410) shall be applied over the prepared surface prior to applying the HDP Water-Repellent Coating.
• Stucco: Dryvit Color Prime shall be applied over the texture coat prior to applying the HDP Water-Repellent Coating. If additives are present in the stucco, a test patch shall be made and bond strength checked prior to application.