600mm*8m 5 Layers Heavy Duty Culvert Moulding Balloons

Culvert rubber balloons, is also named culvert rubber mandrel, culvert core mould, culvert airbag etc, as inflatable tubular form/ pipe making in culvert construction projects. It is a popular and new products for culvert formwork. Comparing with steel/ plastic formwork, the inflatable rubber balloon /airbags have many advantages: -easy to handle / simple application and backout. -easy to storage and space saving -more economical and cost-saving -long service time, can be reused for more than 100 times.