The HRK stamp is a refractory material to be tamped with an air rammer to form a precise construction body. Due to its dense and excellent heat resistance, it has excellent erosion resistance of molten metal.

HRK plast is a clay-like refractory material for placing, which is made by adding a binder and water with excellent plasticity to a high-grade refractory aggregate. No kneading work is required; it can be installed immediately by placing, hand-painting, or tapping.