EvanT123 Posted August 11, 2014 Posted August 11, 2014 Installed a lowrance 4x on my jon boat today. Took it out on the water and when I loaded the boat there was a bunch of water in the plug area. Normally it's bone dry so I would conclude it's from the holes I drilled for the transducer. I covered the screws in marine grade epoxy prior to installation but it's pretty clear I didn't get a good seal. Anyone have any tips on how to seal this better? Thanks in advance. Quote
EvanT123 Posted August 11, 2014 Author Posted August 11, 2014 3M 5200 Would it be a bad idea to put it around the head of the screw? Quote
Super User slonezp Posted August 11, 2014 Super User Posted August 11, 2014 It's permanent. Once it dries it's not coming off without a fight. Quote
tntitans21399 Posted August 11, 2014 Posted August 11, 2014 Silicone, get some waterproof silicone caulking. There is marine grade. Make sure everything is dry and you can put it all around and cover the head. When it cures it is waterproof and water tight. No water can get it. It isn't to hard to peel off if you need to unscrew. I usually drill the pilot hole, put a dap of silicone in it and screw the transducer tight then cover the screw area. Then its watertight. 1 Quote
Super User Scott F Posted August 11, 2014 Super User Posted August 11, 2014 Put whatever sealant you use on the screw threads and in the hole before you screw them in. It will ooze out around the screw and seal out the water. Putting it on the head of the screw then won't be necessary. Quote
Team_Dougherty Posted August 11, 2014 Posted August 11, 2014 When you use silicone. Put some around the screws. Let it cure a little bit before the final torquing. This will give it time to make a gasket. If you tighten it down before it is somewaht cured it will only squeeze it all out from under the screw head leaving nothing behind to act as a gasket. I have also wrapped the screw threads with teflon tape before installing. Quote
Super User WIGuide Posted August 13, 2014 Super User Posted August 13, 2014 Take it back off and put silicone in and around the holes before you put the screws in. You should be good to go after that. Quote
Super User tcbass Posted August 19, 2014 Super User Posted August 19, 2014 When you use silicone. Put some around the screws. Let it cure a little bit before the final torquing. This will give it time to make a gasket. If you tighten it down before it is somewaht cured it will only squeeze it all out from under the screw head leaving nothing behind to act as a gasket. I have also wrapped the screw threads with teflon tape before installing. How long do you let it cure before you screw it in? Quote
Super User tcbass Posted August 19, 2014 Super User Posted August 19, 2014 Will this work? I know it's not marine. Quote
Team_Dougherty Posted August 19, 2014 Posted August 19, 2014 How long do you let it cure before you screw it in? I usually let it sit for a few hours. Quote
Super User Fishing Rhino Posted August 19, 2014 Super User Posted August 19, 2014 You can also just fill the hole with silicone. Let it sit overnight, then reinstall the screws. The screw will drive into the silicone, which is set, compressing it between the hull and the screw, making a watertight seal. Quote
Super User tcbass Posted August 20, 2014 Super User Posted August 20, 2014 This not Dap Won't the dap work? I couldn't find 3M 5200. Quote
Super User WRB Posted August 21, 2014 Super User Posted August 21, 2014 3M 5200 is a marine sealant ideal for your application.take out whatever you used, clean the surface, apply the 5200 and install the hardware, let dry and you are good to go. Tom Quote
Super User Catt Posted August 21, 2014 Super User Posted August 21, 2014 Won't the dap work? I couldn't find 3M 5200. DAP - Latex - fine for bathroom sink 3M 5200 - Polyurethane - marine grade Quote
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