... SL-6688 system with high-grade surface coating resins, good leveling, good adhesion, high surface hardness of their products, high ... SL-6688A system with high-grade surface coating resins, good leveling, good adhesion, high surface hardness of their products, high gloss ... SL-6688 system with high-grade surface coating resins, good leveling, good adhesion, high surface hardness of their products, high ...