Zahabiya Soft Seal Special ZSP-1191 is a mastic & caulking sealant which forms a soft gasket seal on self-curing. For all applications where a vapour barrier, air / gas tight, water & oil proof, weather resistant and non-cracking sealant is required, this product is the perfect answer. It is an ideal & non-toxic DUCT SEALANT for HVAC Ducting System, useable for both high and low velocity air-conditioning & ventilation ducts. ZSP-1191 has very good adhesion with metallic surfaces, plastics, glass, polyurethane foams, thermophore sheets, glass wool insulation etc. It is the best replacement of traditional toxic silicon sealants & can be used in closed environment without emitting any bad odour or toxic fumes. The product is safe in handling and use.