Disadvantages of foamed polyurethane:
1. At temperatures below 10℃, the foaming rate is reduced. Therefore, the use of the season is obviously restricted.
2. Toilet toilet only need to be waterproof and not insulated, should not use foamed polyurethane.
3 Foam polyurethane spray molding speed is fast, it is not easy to spray very flat uneven is normal. Used for roof waterproof insulation, flatness can be
Relaxed but gutter, gutter flatness is not good, will affect the drainage velocity. Therefore, it also needs to be used in conjunction with other waterproof materials