BCF has everything you could need as far as boating goes, from zip ties and shackles to trailer parts and anchors, but it doesn't stop there! If you've ever done much work on boats, you will have heard of Sikaflex. Specifically developed for use in the marine market, Sikaflex 291 Adhesive is a non-sag polyurethane sealant that is ideal for sealing any holes you might put into your boat, like screwing in your transducer. Simply mount it up and screw it in, then remove the screws again, add some Sikaflex to the thread and back of the screw head and replace them. The holes are now 100% sealed and going nowhere!