Shenzhen Gunai sealant CO., LTD is a high-tech enterprise which focus on Polyurethane waterproof material and sealant’s research, exploitation, production. The technical team has been built for more than 20 years. Our company had already pass ISO9001:2000 quality system certification. The polyurethane building sealant and coating adhesive we made can satisfy the need for high grade waterproofing works in the construction field.