Sub Box Build Question

[intrlaz]

Question for anyone who has worked with wood and resin. I just completed building a ported box with MDF and have covered it with several coats of resin.

Problem is, the resin is not drying in a couple of areas only where the wood glue seeped out of the joint. I have left it for several days so I know by this point it will not be drying.

I even scrapped and sanded the areas down where there was some excess wood glue, then reapplied, but the resin still will not dry.

Any suggestions? Could I just rhino-line over the entire thing?

Thanks

[ZANDERSANTE]

Did you mix up one big batch of resin? Sounds like you have a spot of resin with no hardener in it.. You may try dabbing it with alittle hardener and see if that does the trick.. Mine had spots that were slightly tacky but it worked out fine when I sanded it all down before I put on the body filler.

[ZANDERSANTE]

Or it may be something in the wood glue that the resin doesn't like. Did you remember to coat the inside of the box as well?

[intrlaz]

Its something that has to do with the wood glue, since i only make small batches at a time. Maybe i will try sanding it down again and leaving the wood exposed to air for a few days to let any wet glue dry.

Ill report back

[EarmarkMarine]

Chances are your glue is water-based where as the resin is solvent-based. That may be some of it.

On another note, its useful to fill and sand all screw, staple, and seam imperfections before applying resin. Its precisely thesespots where the coating will fail.

Also, build drainage into your box installation. Elevate the box off the sole. There is no coating that will last if you set the box in a moisture trap (ie, carpet pressed between two surfaces).

If you follow these steps, whether you're using epoxy resin, polyester resin or rhino/linex, your box has a good chance of lasting for five years.

David
Earmark Marine

[intrlaz]

Thanks guys, I will post pics later this weekend

[steve-o]

My sub box is built out of MDF, isn't coated, is covered in carpet; it's 6 years old, has been through 2 boats, and still solid. I live the most humid state in the country, too. I keep waiting for it to fail, so I can build one that I can get farther back in the storage compartment, but it won't quit.