New Hydrophobic Dispersions from Wacker for Waterproofing Buildings at Low Temps
The WACKER Chemical Group has developed two new hydrophobic dispersions for waterproofing buildings at low temperatures: VINNAPAS® 754 ED and VINNAPAS® 764 ED. VINNAPAS® 754 ED is used as an additive in two-part waterproofing membranes. It retains its crack-bridging ability at temperatures as low as ‒5 degrees Celsius.
Preventing water and moisture damage is one of the most important challenges involved in the medium- and long-term upkeep of buildings. One option for protecting balconies, bathtubs and other surfaces from water penetration is to apply cementitious waterproofing membranes. When these set, they form a self-contained, water-repellent film which is flexible enough to bridge the cracks in the sub-floor that result when the building settles or when temperatures and other weather conditions fluctuate. Depending on the field of application, these types of waterproofing products may even perform at very low temperatures. Wacker reports that polymeric binders blended in during the manufacturing process provide the necessary flexibility and hydrophobicity. Additives like these can constitute as much as 30 percent of the waterproofing membrane.
According to Wacker, it has recently developed two polymer dispersions to meet this set of product requirements: VINNAPAS® 754 ED and VINNAPAS® 764 ED. Both products are terpolymers based on vinyl acetate, ethylene and vinyl ester. They are used as hydrophobic binders in two-part cements and help to bond the end product reliably and permanently, even on difficult substrates.