HB Mortar is a chemically hardening, halogen free, 100% potassium silicate, acidresistant brick mortar. It is especially suited for the installation and maintenance of linings in acid towers, tanks, process equipment, pressure leaching autoclaves and other similar systems in the acid-resistant construction industry. HB Mortar requires no acid wash and employs a unique, inorganic, patented hardening system which makes it particularly resistant to sulfation-hydration, crystal growths, and, when cured, water wash out. It conforms to ASTM C-466. HB Mortar is not resistant to acid fluorides or hydrofluoric acid. Consult Corrosion Engineering specification CES-358 for complete installation details.