I'm trying to figure out what to seal my centerboard screws with. It needs to seal it but the screws will also need to come out in the future so 5200 is out. They're countersunk 1/4" machine screws. Any recommendations?
What to use to seal below water screws?
- Thread starter Project_Mayhem
- Start date
Those are multipurpose screws. They'll collect seaweed for your next meal, collect lines floating in the water before it hits your prop, pre-gut your fish and even keep sharks from bumping into your hull!
So I've read that 4200 should be applied to the screw head/hole screw it down a bit, allow it to dry and then screw it in all the way? Wouldn't turning of the screw break the seal?
You can right-click over the image and "search Google for image" to see that several sights have used the picture as a warning to others. Makes me think of this poster -
Don Casey used to promote this method of twice tightening screws. And you are correct, if you tighten it a second time the bond between the sealant and the screw is broken.
If something is through bolted and the nut can be tightened without turning the bolt, then maybe perhaps it will work.
Do counter sink the hole, this allows the caulk to form a larger "gasket" around the screw. See this article: https://marinehowto.com/bed-it-tape/
I was anchored in the creek out from Cracker Boys yard in Ft Pierce and working in the yard. There were some guys installing new stringers in a power boat. They got all done, took it to the lift and the boat would NOT come off the trailer.. They had neatly screwed the boat to the trailer bunks, on both sides, with about 20-30 screws to a side. Caused a TAD of amusement from the yard staff
