Concrete Hardeners / Densifiers We're really sorry... ...we don't currently have that one in stock Please add your email and we'll notify you when it's back Home » Chemicals » Concrete Hardeners / Densifiers Manufacturer: Diteq Product ID 161529 DI-HARD Lithium Based, Concrete Hardener/Densifier 1Gal. Price: $59.00 Manufacturer: Diteq Product ID 160941 DI-HARD Sodium Based, Concrete Hardener/Densifier 5Gal. Price: $167.00