Unlike traditional latex or acrylic coatings, polyurea, as a suitable waterproofer even under seawater immersion, is in no way influenced by ponding water, which is very often on existing roofs.

优于丙烯酸防的主要一点是聚脲的耐积性能，而面积在国内常普遍。

The characteristic, structure, raw materials, equipment, process, cost and applications of arched colour plated roofing are introduced. The foams act as insulator, seal and waterproofer in roofing.

简要介绍了用泡沫塑保温、密封、防的拱形面的特点、构造、材、设备、施工工艺、生产成本和应用。