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Compass Marine How To | all galleries >> Welcome To >> Sealing Deck Penetrations to Prevent Core Rot > Inject Non-Thickened Epoxy First
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Inject Non-Thickened Epoxy First

Inject Non-Thickened Epoxy First

I know I said "thickened epoxy", and we'll get there, but first it is a good practice to inject clear un-thickened epoxy into each hole. By doing this you allow the less viscous, resin only, without thickener, to penetrate the surface pores of the core. This tends to create a better and stronger final bond.

In order to do this I inject straight mixed epoxy into each hole with a syringe. I then let it sit in each hole for about 3-4 minutes and suck it back out with the syringe and squirt it back into the container where I add Cabosil to thicken it.

Nikon D200
1/60s f/13.0 at 24.0mm iso100 full exif

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Guest 16-Nov-2013 16:20
Did you use the white tape first? What keeps the epoxy from running straight through the holes and out into the cabin below?
Ernst Matheus 22-Mar-2013 20:19
How about CPES. It will penetrate the wood even deeper as just epoxy?
Jordan 17-Oct-2009 23:40
This is a really great explanation. The pictures are great. The explanations is thorough. I now feel very confident tackling this on my boat and know it is going to come out top notch. Thank you so much for this great resource.