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Old 12-05-2019, 04:13 PM   #19
stubones99
Guru
 
City: Melbourne, FL
Join Date: Dec 2014
Posts: 1,731
Once you get the hatch holes cut, tape off the flange of the hatch with wide painters tape, mount the flange in the hole and build up the gap with thixo and let it set. Then remove the hatch flange an smooth any gaps with more thixo and clean up the surface. Let it cure, and mount the flange. If all you have is a 1/4" gap on two hatches, one tube will work. Each tube comes with two nozzles. Leave the first nozzle on it once you have both hatched sealed up, and then once you get the flanges off, switch to the second nozzle and continue with the cleanup of the coaming around the hatch.
Don't torque down the bolts when you initially mount the hatch or you'll warp the flange and that won't end well. Just tight enough to stop any movement while you fill the gaps between the deck and the flange. You probably want to sand down the inch or so under the flange, so the thixo epoxy will have something to stick to.
https://www.amazon.com/TotalBoat-Thi.../dp/B00X6AM06I
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