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Culvert Balloon is also famous as rubber airbag, ship launching airbag, marine lifting airbag, boat salvage airbags, inflatable airbag, ship launching bag, air bag, made by rubber & multi layer of rubber-dipped tire fabric.Culvert Balloons are widely used in Culvert construction, launching and landing ship/ boat/vessel, lifting and moving heavy objects, caisson floating, marine engineering. Culvert Balloons are very popular among the on land construction companies.

Culvert balloon is a kind of cylinder bag that can expand, shrink, used to form concrete component of cavity. It is easy to be used, economic, and durable. It can not only save materials, but also has the shape characteristics, as it could be round, rectangle, octagon, hexagon, trapezoidal pipeline, etc.

Specification of Rubber core mold 
1> Diameter (D)   : From 0.3m to 2.2 m.
2>Total Length (TL) : From 7m to28m.
3>Other specification also available upon customer's request.