High solid primer defoamer BYK-1790 for solvent-based coatings/ light-curing coatings/ solvent-free coatings Technical Data Sheet High solid primer defoamer BYK-1790 BYK-1790 Defoamer is a silicone-free, polymer based defoamer for solvent-free, radiation-curing wood and industrial coatings, printing inks and adhesives. Suitable for pigmented and unpigmented coating systems. The high efficiency of the defoamer is not impacted by pigmnets, fillers,wax additives or matting