Lightweight and strong thermo-acoustic sheeting is the perfect choice for your project. Resistant to chemicals and extreme weather conditions. Thermoliner is ideal to insulate the sides and the roof of a swb VW T4, T5, Mercedes Vito, Vauxhall Vivaro etc. It is manufactured from cross-linked closed cell polyethylene foam it has excellent thermal insulating properties due to its low U-value.
It is also backed with a non-tear silver foil on one side this also assists keeping the radiation heat in when it's cold and out when its hot it works at its best when the silver foil is facing an open space. It is a closed cell polyethylene foam 7mm OR 10mm Thick and so, it is water repellent, does not rot or go mouldy.
All you have to do is cut it to shape, stick it where it is needed! It's the best insulation product that we have found anywhere.
Far better than any foil covered bubble wrap!