Commonly the material is LLDPE, if it is close to the engine, we could choose Cross-linked polyethylene(XLPE), which can resist the temperature more than 100centi degree.
We made a lot of roto-moulding products, wish we can do it for you.
What is the difference between water glass casting process and silica sol casting process?
There are a few differences between the water glass casting process and the silica sol casting process in terms of chemical composition, production methods, casting
