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Is there a big difference in performance and durability between SBS 3+3 and single-layer 4mm in roof waterproof repair? How about polyester tires? How much is an apartment?
Hello, I am waterproof. We can talk over the phone or cooperate.
Sbs3+3 can protect twice, and the single-layer 4mm polyester tire is more durable than 3mm sbs, because the two materials are different, the price is different and the degree is different.