A specially developed, high built CARBON FILLED mortar has excellent resistant against attacks of Hydro Fluoric Acid, florid salts & other strong alkalies. Brick and Tile lining work in stainless steel pickling plants where all acid proof mortars fails, Techno tech's special Carbon Filled Mortars resist all attacks from HCL & Hydro Fluoric (HF) acids up to many years. Graphite & Carbon Tiles of all the sizes are readily available.