BYK® -425

Solution of an urea modified polyurethane. Acts as a liquid, VOC-free, rheology control additive for aqueous coatings. Designed for adjusting the low shear viscosity of water soluble resin systems providing pseudoplastic flow behavior. Offers improved sag resistance. Exhibits improved anti-settling properties. Increases in-can viscosity. It does not require pH-value adjustment for rheology effect and does not lower gloss. Adjusts flow properties of pigment pastes. Used in architectural coatings, wood & furniture coatings, industrial coatings and overprint varnishes.