Adaptable square inner formwork which is pre-mouldable by inflation to render the formwork watertight and seal potential leaks when using Calcel Route.
The inflatable square formwork tube reinforces the formwork as well as avoiding possible CALCEL ROUTE resin overflow in the manhole. The tube easily adapts to support irregularities and does not stick to the CALCEL ROUTE resin. It is transparent to facilitate visibility inside the manhole and monitor the resin-filling process. It has handles for ease of use and is reusable.