Ultra Masonry Block Sealer is a penetrating, water-borne masonry sealer designed for use on concrete, brick, stucco, block and other masonry surfaces.

The product uses a polymer and acrylic formulation that penetrates the masonry matrix, fills voids and coats the interior particles. Once dry, it leaves a slight sheen on the treated surface.

Ultra Masonry Block Sealer is designed for industrial, commercial and residential use, with applications including sidewalks, driveways, parking decks, floors, ramps, walls, brick, pavers, stucco, cinder block and stone. The supplied product specifications also list applications across warehouses, commercial buildings, factories, roads, tunnels, bridge decks, parking structures, concrete roofs, subways and basements.

The sealer can be used inside or outside on new or old masonry, subject to appropriate surface preparation and application conditions.

Application is generally carried out using a low-pressure sprayer, applying the product liberally enough for the surface to absorb it without leaving puddles. Back-rolling can be used to even out the material and remove excess product from low areas.

Coverage is approximately 4–5 m² per litre, depending on the roughness and porosity of the surface. Highly porous, historic or aged surfaces may require a second coat to achieve the desired level of sealing.

Ultra Masonry Block Sealer is supplied as a one-component system at normal viscosity and should not be diluted with water. It has a milky appearance before drying, approximately 19% solids by weight and a stated VOC level of 66.43 g/L according to EPA Method 24.

The product is described by the manufacturer as non-flammable, non-toxic, low VOC and suitable for easy water clean-up, with a stated 10-year product warranty subject to correct application.

For best results, surfaces should be thoroughly cleaned, dry and free from dirt, dust, oil, grease, mildew, rust, loose material and other contamination. Where existing sealers or coatings prevent water absorption, Ultra Masonry Block Sealer should not be applied.

Allow the product to dry thoroughly before traffic is permitted. The supplied specifications state that the penetration and curing process can take 5–7 days, while walls or slabs should generally be allowed 24–36 hours before painting, using only a suitable moisture-resistant acrylic or oil-based paint.

Always test the product on the intended surface before full application and follow the manufacturer's current technical and safety documentation.

• Apply only in suitable weather conditions when the air and surface temperature are above 5°C. The temperature should remain above 5°C for 24 hours after application.
• For optimum application properties, the supplied documentation recommends material temperatures between 5°C and 35°C before application. Store unused material in closed containers between 5°C and 35°C, protected from direct sunlight.
• Do not apply to surfaces that do not absorb water, as this may indicate the presence of an existing sealer or coating that could prevent proper penetration.
• The product is not intended for extended submersion in water.
• Do not add water or dilute the product. It is supplied as a one-component system at its normal viscosity.
• Good surface preparation is essential. Remove dirt, dust, oil, grease, mildew, rust, loose material, cracked paint and other contaminants before application. Cleaning products must be thoroughly removed and the surface allowed to dry.
• Avoid leaving puddles during application. Apply sufficiently for the masonry to absorb the product and back-roll where required to even out the application.
• Latex paint is not recommended over treated surfaces because the supplied manufacturer information states that it may form a weak bond, particularly in exterior applications. Use a suitable moisture-resistant acrylic or oil-based paint instead.
• Always test the product on the intended surface before full application.