For an extra high performance and panel bonding adhesive formulated specifically to bond insulated panel materials to GRP and plywood (as well as EPS and polystyrene), the Tensorgrip® C11 is your best bet. This fast-drying formula has fantastic high coverage designed for bonding exterior grade substrates to insulated foam. Even better, this formula has exemplary resistance when dealing with moisture and extreme weather exposure.
High temperature resistance
Designed for bonding exterior grade substances (FRP/GRP) to foam many other substances
Versatile - polystyrene and EPS compatible