High Strength Refractory (approx 2000 psi @ forge heat), High Alumina, Moderate Density (90 lb/ft3), Insulating (new generation bubble class) refractory with low thermal conductivity.
Rated to 3000 °F (well above forge welding heat). Low Iron (0.9%) for flux resistance. Hydraulic set.
It can be used on its own, or as a layer over top of wool (best to toughen up the wool first with our freeze-proof rigidizer to prevent its compression during application), etc.