Home |
Search |
Today's Posts |
#11
|
|||
|
|||
epoxy does so pass water
"Freddie Richard" ) writes:
What would you use instead of epoxy? or what would you recommend? on my small plywood boats I painted the exterior and used linseed oil on the interior. those boats are fastened with screwed and glued chine battens. its much cheaper to build that way. epoxy is too damned expensive and is not needed on small plywood boats in my opinion. besides you can't buy a 55 gal drum of epoxy to get a lower price if you're just building a kayak. waste of money. there are photos of my boats on my website. if you do use epoxy you have to also use fibreglass cloth. on big boats they recommend three layers of cloth and resin to "encapsulate" the boat. I've seen a single layer of cloth and epoxy resin on a kayak which didn't do much good at all. -- Thank You, Freddie L. Richard "William R. Watt" wrote in message ... The owner of an epoxy sheathed plywood (okume marine) kayak was showing me today the deterioration in the surface ply on the inside of the hull. The builder had let the boat sit outside over the winter mistakenly assuming epoxy was impervious to H2O. Snow accumulated in the cockpit, melted, froze, melted again, and by late spring there was 6" of melt water inside the hull. The epoxy sheathing on the inside of the hull did not stop the water from getting at the plywood and starting rot. Accept the claims of epoxy purveyors and promoters at your peril. -- -------------------------------------------------------------------------- ---- William R Watt National Capital FreeNet Ottawa's free community network homepage: www.ncf.ca/~ag384/top.htm warning: non-freenet email must have "notspam" in subject or it's returned -- ------------------------------------------------------------------------------ William R Watt National Capital FreeNet Ottawa's free community network homepage: www.ncf.ca/~ag384/top.htm warning: non-freenet email must have "notspam" in subject or it's returned |
#12
|
|||
|
|||
epoxy does so pass water
William R. Watt ) writes:
.. if you do use epoxy you have to also use fibreglass cloth. on big boats they recommend three layers of cloth and resin to "encapsulate" the boat. I've seen a single layer of cloth and epoxy resin on a kayak which didn't do much good at all. I should add that once you get three layers of glass and epoxy on a plywood kayak you've got yourself a very heavy kayak. I'd just go with the plywood. However if you're building to someone else's design and it says use epoxy then you should use it. Make sure the finished weigth of the kayak is clearly stated in the plans. -- ------------------------------------------------------------------------------ William R Watt National Capital FreeNet Ottawa's free community network homepage: www.ncf.ca/~ag384/top.htm warning: non-freenet email must have "notspam" in subject or it's returned |
#13
|
|||
|
|||
epoxy does so pass water
Correct. That post probably came from somebody who is prejudiced against
modern materials. If an epoxy boat is left out unpainted for years, the UV's will break down and problems will start. Do you know that those Abram's M1 tanks are very weak and unsafe? I heard that one was destroyed last week. See where those generalizations lead us? -- Jacques http://www.bateau.com "Brian Nystrom" wrote in message ... "William R. Watt" wrote in message ... The owner of an epoxy sheathed plywood (okume marine) kayak was showing me today the deterioration in the surface ply on the inside of the hull. The builder had let the boat sit outside over the winter mistakenly assuming epoxy was impervious to H2O. Snow accumulated in the cockpit, melted, froze, melted again, and by late spring there was 6" of melt water inside the hull. The epoxy sheathing on the inside of the hull did not stop the water from getting at the plywood and starting rot. Accept the claims of epoxy purveyors and promoters at your peril. How about a few more details? How was the hull sealed? Was it simply a thin epoxy sealer coat or was the inside glassed as well? It makes a huge difference in permeability. Was the epoxy damaged (cracked) by the freeze-thaw cycles? Let's also remember a couple other points: - A coat of varnish or paint over the epoxy would have eliminated the problem. - Simply covering or inverting the boat to prevent water accumulation would have prevented the problem. The issue here is not any deficiency of the epoxy, but rather a deficiency on the part of the builder. -- Regards Brian |
#14
|
|||
|
|||
epoxy does so pass water
If you consider how many boats have been coated with epoxy, and how many
complaints of failure that you hear about, I'd say you have a very good chance that epoxy will work as advertised. In fact, failure due to water absorption is so rare, I'd lean towards blaming the builder/epoxy coater rather than the epoxy. Brian "Backyard Renegade" wrote in message om... "Freddie Richard" wrote in message ... What would you use instead of epoxy? or what would you recommend? Nothing! The brunt of this discussion is that Epoxy is not a miracle cure all, it is however probably the best the average builder has available. The point is that Epoxy can be part of a process that will control water movement, but it is a team effort and it takes paint, fiberglass, proper preperation, proper application, some effort and thought of the builder, and of course dillagence (sp?) on the part of the owner. Scotty from SmallBoats.com -- Thank You, Freddie L. Richard "William R. Watt" wrote in message ... The owner of an epoxy sheathed plywood (okume marine) kayak was showing me today the deterioration in the surface ply on the inside of the hull. The builder had let the boat sit outside over the winter mistakenly assuming epoxy was impervious to H2O. Snow accumulated in the cockpit, melted, froze, melted again, and by late spring there was 6" of melt water inside the hull. The epoxy sheathing on the inside of the hull did not stop the water from getting at the plywood and starting rot. Accept the claims of epoxy purveyors and promoters at your peril. -- -------------------------------------------------------------------------- ---- William R Watt National Capital FreeNet Ottawa's free community network homepage: www.ncf.ca/~ag384/top.htm warning: non-freenet email must have "notspam" in subject or it's returned |
#15
|
|||
|
|||
epoxy does so pass water
The point is that Epoxy can be part of a process that will
control water movement, but it is a team effort and it takes paint, fiberglass, proper preperation, proper application, some effort and thought of the builder, And proper storage of the final product doesn't hurt either ). Greg Sefton |
Reply |
|
Thread Tools | Search this Thread |
Display Modes | |
|
|
Similar Threads | ||||
Thread | Forum | |||
HELP! Water in bilge when running... | General | |||
Habbi's gearcase full of water | General | |||
Where to find ramp stories? | General | |||
Trailer Tires Overheating. | General | |||
Hooking up flush muffs...no water coming out of discharge (outboard) | General |