BYK S 780 is an additive that prevents surface tackiness in resin systems. It forms an optimal film on the resin surface that prevents the inhibiting effect of atmospheric oxygen. BYK S 780 ensures tack-free surfaces in ambient curing resin systems. The additive is particularly suitable for vinyl ester resins and can also be used in orthophthalic resins. It prevents surface stickiness issues that can occur during curing or drying. BYK S 780 additive allows for efficient film formation and surface protection, improving productivity and end product quality in various industrial applications.