BRB Siloen® WRC4

BRB Siloen® WRC4 is a solvent-free thixotropic impregnating water-repellent agent, based on alkyl silane suitable for the protection of building materials. BRB Siloen® WRC4 is also recommended as a chemical damp-proofing agent.

– Hydrophobizing impregnation of medium and low absorbency high-density porous mineral, silicate, and alkaline substrates (concrete, reinforced concrete, plasters, clay, and terracotta bricks).
– Hydrophobic agent to stop rising damp in masonry.

– Excellent penetration due to paste consistency allowing long contact time.
– Water-based, environmentally friendly.
– Alkali resistant.
– Significantly reduces water and water-soluble pollutant uptake.
– High water penetration resistance by capillarity without clogging pores.
– High vapor permeability and breathability.
– Invisible protection that doesn’t change the aesthetic of the substrate.

– Protection against rain and runoff water.
– Prevents efflorescence and stops the growth of microorganisms.
– Enhanced durability.
– Creates a chemical barrier against rising damp.

Masonry Water Repellent

BRB Siloen® WRC4 is typically applied undiluted in one layer in the desired thickness, depending on the substrate conditions (porosity, humidity, etc.). The substrates should be dry (less than 5% surface moisture) and clean. Cracks bigger than 0.3 mm must be repaired before treatment.

For large surfaces, apply BRB Siloen® WRC4 with an airless gun, or use a trowel followed by a roller for uniform coat-weight on smaller areas. Dosage generally ranges from 100 to 700 g/m² based on porosity and humidity of the building material. Avoid applying under direct sunlight, and ensure substrate temperature is between 5 to 45 °C. Protect treated surfaces from rain for at least 4 hours.

Rising Damp Proofing Chemical

BRB Siloen® WRC4 can be injected into walls affected by capillary rising damp. Drill holes along the base of the wall with an inclination, inject BRB Siloen® WRC4, and seal with non-shrinking mortar.