Sairset 3000 Refractory Mortar · Only apply evenly to the contact surfaces of your refractory bricks, not the wall. · Only apply a thin layer up to 1/16'' of 'SAIRSET. A wet, air-setting, fireclay mortar. Download Product SDS. English · French Canadian · Spanish · Spanish · Bahasa Indonesian · Indonesian.For detailed mixing and using instructions, contact your ANH representative or visit anhrefractories.com. Heatup/Dryout Schedule. Not applicable. Sairset is a wet, high-strength, air setting, high temperature mortar. It is formulated for troweled joints, Always follow manufacturer's instructions.