Synthetic Teak Decking - MyBoatsGear.com.30 Dec 2016 . Because of this Teak Decks on boats are a luxury these days. Many years ago Teak Decks for boats were the norm. The teak was laid on the deck frames and then caulking was used to seal the gap between the planks. Nowadays with composite construction teak decking is now a symbol of a good quality.