Boat Decks: Teak vs Synthetic Teak - Sail Magazine.10 Sep 2016 . Since the advent of fiberglass boat production, sailors have had a love-hate relationship with teak decks. .. Triflex Ltd., treadmaster.co.uk/tkc.html . Supplied by the Dutch building materials manufacturer Leeuwenburgh Fineer, the deck is not as slippery as it looks, but I wouldn't trust it in heavy weather.