There's a way to securely use fasteners in composite decks – it's a precise strategy
This is a boat I'm redoing – it's getting a seize bar. Boat has a nidacored deck- nida corevwill Never ever hold a fastener. The fastener would be held by the skins of fiberglass on the nidacore only – ensuing in a failure. You can endeavor to use 3m 5200 to mattress the fastener – but I promise you it will are unsuccessful !
Other composites are similar – divinycell voids/Penske board- these will not hold a fastener possibly….
Securing fasteners in composites