Protectosil® WS 328

Solvent-free emulsion based on reactive organomodified siloxanes for the hydrophobizing impregnation of absorbent, mineral substrates with excellent beading properties

Scope of Application

Protectosil® WS 328 Milky white emulsion based on organomodified siloxanes Almost free of volatile organic compounds (VOC) Diluteable with water Treatment for brick, natural stone and facades Injected damp-proof course (DPC, horizontal barrier) for brick, stone and concrete walls Hydrophobizing impregnation of neutral, mineral substrates Efflorescence prevention Penetrates very good in porous, mineral substrates Invisible and water vapor permeable protection Reduction of water uptake and water soluble pollutants For the production of ready-to-use formulations Protectosil® WS 328 may be diluted to 5 - 25 % active content depending on the intended use. For the production of ready-to-use dilutions water (preferably de-mineralised) is added to the emulsion while stirring at low shear. Dilutions should be protected from growth of microorganism by the addition of a suitable preservative (e.g. Acticid MBS from Thor-Chemie). We recommend stirring Protectosil® WS 328 and formulations made from it prior to use. Masonry water repellents produced from Protectosil® WS 328 should be applied by flooding, brushing or rolling. The substrate should be dry and clean with sufficient porosity. Acceptable surface cleaning methods include sandblasting and water blasting. It is recommended to evaluate the required dosage by means of representative test areas prior to the final impregnation. Very dense substrates (e. g. marble) may not be suitable for impregnation with products based on Protectosil® WS 328. Very absorbent substrates may require up to 1 l/m² of Protectosil® WS 328. During application outside temperatures and surfaces temperatures should be between +5 °C and +40 °C. Protectosil® WS 328 should not be applied during strong wind or rain.