at single to low quantities. Air set sand fills that need by hardening with the use of a two to three part epoxy type material, causing the sand to harden and maintain very sharp... detail without the need of hard packing, vibration or pressure on the pattern equipment. Our air set process has allowed us to pour very large and heavy castings that many or most... customer service and environmental sustainability. All of our metal is certified and purchased from a local US smelter using all recycled metals. All of our sand is 100% internally...