DESCRIPTION & INTENDED USE
HydroBloc is a high-performance, Membrane water-based acrylic coating formulated to create a flexible, waterproof membrane with outstanding adhesion to a wide range of construction surfaces. It is specially engineered for use in below-grade applications and as a waterproof base layer in system assemblies.
SURFACE PREPARATION
All surfaces must be structurally intact and clean. Remove contaminants such as dirt, oil, grease, dust, curing compounds, sealers, or anything else that could affect bonding. In some cases, mechanical preparation like shot blasting or pressure washing at a minimum of 3500 psi may be necessary to ensure good adhesion.
For block walls, ensure all mortar joints are filled flush. On cast-in-place concrete, only waterbased form releases should be used. If an oil-based form release was previously applied, it must be thoroughly cleaned using Trisodium Phosphate (TSP) and rinsed off with high-pressure water before applying HydroBloc.
APPLICATION
Apply a single heavy spray coat or two full coats using a ¾” nap roller at 20-30 mils to the surface that has been properly prepared and primed. When rolling, ensure the roller is fully loaded with material to achieve a uniform, saturated application. For airless spray application, employ a sprayer with a tip size ranging from .025″ to .027″ to optimize atomization and coverage. To calibrate spray coverage, designate a 200 square foot test area and apply one complete 5-gallon container evenly across this zone. Adhere strictly to specified coverage rates, particularly on vertical substrates such as retaining
walls, to ensure proper film build and performance. For drainage management, incorporate LastoDrain or an equivalent drainage mat beneath the coating system. For use only in below-grade waterproofing and underlayment conditions.
LIMITATIONS
• Do not apply if ambient or surface temperatures are below 40°F and falling or above
90°F and rising.
• Do not apply if rain is expected before the product has fully cured.
• Not suitable for surfaces with active negative-side water pressure or high vapor
transmission.
