| SILRES® BS 4004 is a water-thinnable, solventless emulsion, based on a mixture of silane and siloxane. Dilute solutions of SILRES® BS 4004 serve as high quality, general-purpose water repellents for hydrophobic impregnating and priming mineral surfaces. Mineral substrates treated with SILRES® BS 4004 are especially characterized by an excellent beading effect. Moreover SILRES® BS 4004 can be used for the mass hydrophobation of non-load bearing concrete products. Properties: SILRES® BS 4004 emulsion contains a stabilized mixture of silanes and siloxanes that are susceptible to hydrolysis. Hydrolysis occurs only after application tothe substrate, which breaks the emulsion. Alcohol is released and the emulsion is converted into a silicone resin water repellent. SILRES® BS 4004 reduces the capillary absorption of the building which it has penetrated, but does not clog pores or capillaries. There is therefore little or no impairment of the building material´s ability to "breathe". Special features: - good depth of penetration
- rapid development of water repellency
- highly durable and effective beading effect
- tack-free drying
- provides good adhesion for paints
- water-based and environmentally compatible
- stable in storage, even when diluted
Application: Dilute SILRES® BS 4004 is an excellent water repellent for many absorbent mineral substrates, such as bricks, sand-lime brick, natural sandstone and mineral plasters. It is not so suitable for less absorbent, dense natural stone, especially limestone, marble and reinforced concrete for bridges and roads. Owing to its aqueous consistency and storage stability when diluted, SILRES® BS 4004 is ideal for inplant impregnation of building materials made of clay, aerated concrete, sand-lime brick, fibrous cement, mineral fibers and lightweight aggregate. SILRES® BS 4004 may also serve as a water-repellent primer for emulsion paints and plasters, silicone resin emulsion paints and silicone resin plasters.Information provided by Wacker Chemie AG. |
