Synthetic polymer waterproofing membrane: based on the mixture of synthetic rubber and synthetic resin, it is very effective for roof leakage repair; Polymer modified asphalt waterproofing membrane: with synthetic polymer modified asphalt as coating and asphalt base as main body; Synthetic polymer waterproof coating: non-toxic, odorless and environmentally friendly, with a variety of polymer materials as the main film-forming substances.

PremisesPermit refers to the certificate that the buyer obtains the legal ownership of the house through the transaction and can exercise the right of possession, use, income and disposal of the purchased house according to law. That is, the "House Ownership Certificate" is the legal certificate for the state to protect the ownership of houses according to law. Proof that the owner manages and uses his own house. Property ownership certificate includes house ownership certificate and house ownership certificate. Generally speaking, the real estate license is the abbreviation of the house ownership certificate, which is a written certificate issued by the real estate registration authority to prove the ownership of the house.