Substrates to be sealed must be a minimum of 28 days old and/ or be fully cured. The surface must be clean and porous enough to allow the solution to penetrate the substrate.

Surfaces should be clean and free of surface laitance, dust, dirt, debris, mildew, oil, grease, previous sealers, curing agents, paint or other surface coatings, and other contaminants. If acid or other cleaning compound is used to clean or etch the surface, neutralize the surface completely before applying SD125.

Do not apply StoneBlock SD125 to wet surfaces.

Always test porosity before application, especially on very dense surfaces.   The product is a one-part system.  Stir material thoroughly before and during application. Do not apply below 40°F or above 95°F during the application or drying period.

Apply uniformly with a low-pressure sprayer. When applying material, work in small, manageable areas at a time to maintain a wet edge. The product should be applied
to the point of rejection and be fully absorbed within 10 minutes without puddles.
Use a broom, roller, or microfiber pad to evenly distribute the product as well as disperse any puddles as the excessive application may result in the white residue (especially on
darker or colored surfaces) which will not affect sealer performance and generally dissipates over time or by pressure washing.