I haven’t had this problem in years but my last 3 boards all have
leaky box installs. All 3 of these boards have spent a lot of time in a
car and even though I am careful to keep them as cool as possible, I
know they have had some hot days in the car. They are 1.5 and 2 lb eps,
the one in the picture has a vent in the deck.
Anyone think this
could happen from heat? The board was sanded to 400 grit and 3 thin
coats of acrylic sealer were applied. The boxes were all super smooth
but after 2 weeks of early surf with boards in the car at work, you can
catch your fingernail everywhere there is dried salt.
The board is
gaining just under 1/2 ounce of weight each surf.
anyone have this
problem?[img_assist|nid=1050138|title=|desc=|link=none|align=left|width=640|height=425][img_assist|nid=1050139|title=|desc=|link=none|align=left|width=640|height=404]
Did it cop a hit to the fins?. I not long ago landed on my fins ( ouch! ), and bent one of my side fins. After that i noticed the same, salt on the board near the boxes. To be honest, im not sure if the salt was there before i landed on the fins or not, but i never noticed it. I dont think the board is gaining weight though. Maybe you have another small ding you don't know about??
Hope you find out what's happening.
That part of the box should have solid resin all around it, no?. May just be salt in a gap.
Good luck.
Leak? Did you check the rest of the board for a ding? Also are you sure you couldn’t catch your fingernails on the edge when you finished as your insert is sticking up above the box and that usually gets sanded flush with the rest of the box.
cant be a leak. board quality eps doesnt absorb water apparently
anyway ill say what i been say like a stuck record for 4 years
use inserts
Howzit slash,except for the places where it looks like there is no filler the salt is between the box and the filler so it shouldn't be getting into the foam. I would be more worried about those spots where it looks like no filler between the foam and the box since that would allow water to get in. Aloha,Kokua
did you sand the boxes up good with 40 grit and yes it was probably a hot mix and it shrank a bit perhaps and pulled away from the plastic
Are you referring to the area just to the right of the green left arrow? I was wondering if that might be an issue.
Howzit dean, Yes that is the spot I was referring to, that is not good .Aloha,Kokua
Following that it might be a good idea to route the old boxes out and reinstall. Not sure if your vent is removable so you can drain the water? Vents are not my area of expertise…
I’ll take thermal expansion/contraction for $500, Alex.
Did you rough up your boxes before installation or did you leave them clean?
I use Pro-box… Love em… But they’re over glass installs,not under like futures and others, any tiny air bubble in the surrounding resin could let water in, especially in hot air / cold water climates…
I understand 4 ways fin system is coming out with a glass over box, I wonder why…??
I would imagine a lot of pro-box installs are taking on water and not many people are noticing…
Like Silly said: Sand them really good with 40grit, use a slow resin, and set them into a closed cell insert such as core-cell…
I had some boxes shipped to me that were “flame treated” , slightly darkened with a gas plumbing / welding torch, I presume… This is a great idea as it improves the bond between some plastics and resins… I got a shipment of boxes later that were not flame treated and were shiney smooth??
Oh. and you can glass over pro-box, it just takes more patience and effort…
Slash; Check your router template, you definately didn’t get a resin bead all around the entire box for some reason, as Kokua mentioned above, that’s strange??
Thanks for the input, here is a little more info:
I sanded the sides and bottom of all the boxes with 60grit, Had the tail sitting on an ice pack when I did a double pour install (1/2 box at night second half the next morning). I had a few voids from the second pour and used clear epoxy to fill those. I use a metal dental explorer to make sure there are no voids left and the boxes were smooth after the 400 grit. The entire box is just slightly higher now (fraction of a mm). I noticed this when I saw the salt (after a few weeks [7 surfs]).
I checked the board again and it is dry under the vent but I did find a small crack in the rail that was letting water in. I think this is the weight gain culprit but I am still concerned about the salt buildup.
I also found a bead of red epoxy on my red fin gig in the lower left corner so that explains the gap.
I do like under the glass installs but I have been using probox for a while now and the salt is a recent thing
i know the answer
you surf too hard!!
glass over the boxes and it is all good
wouter