... -58A system with high-grade billiard unsaturated polyester resin, the viscosity is moderate, moderate reactivity, completely curing ... alley.SL-58A . SL-58AP series high-end pool with unsaturated polyester resin, the viscosity is moderate, moderate reactivity, flat ... SL-58B system with a common pool of unsaturated polyester resin, the viscosity is moderate, moderate reactivity, manufactures high hardness ...