RHEOBYK-420 | BYK | RHEOBYK-420 is a liquid rheology additive for aqueous and water-reducible coating systems for improving anti-sagging and anti-settling properties. The additive is also especially suited for manufacturing aqueous pigment concentrates. RHEOBYK-420 causes th...view more RHEOBYK-420 is a liquid rheology additive for aqueous and water-reducible coating systems for improving anti-sagging and anti-settling properties. The additive is also especially suited for manufacturing aqueous pigment concentrates. RHEOBYK-420 causes thixotropic flow behavior; post-addition is possible. view less |