Polyurethane foam — excellent waterproofing
Penalisterol — has a long service life. Cons: combustible.
Polyurethane foam — excellent waterproofing, resistance to chemical elements. Cons: combustible.
Penalisterol — has a long service life. Cons: combustible.
Polyurethane foam — excellent waterproofing, resistance to chemical elements. Cons: combustible.