eranb2
Well-Known Member
Hi
modern 30 feet jeanneau boat, in 30 Celsius .
for osmosis blisters reapir.
one month is enough?
thanks
modern 30 feet jeanneau boat, in 30 Celsius .
for osmosis blisters reapir.
one month is enough?
thanks
how long to dry for osmosis blisters reapir?
- Thread starter eranb2
- Start date
robmcg
Well-Known Member
Not likely! What level moisture reading does the hull have? This will have to be monitored before it is advisable to attempt a repair. Once moisture levels are at a low enough level (measured using Tramex etc) then you can start repairs. If it is not dry enough the problem will return fairly swiftly.
eranb2
Well-Known Member
a friend checked it (don't know if he knows how to read the readings), about 60 %.
maxi77
Well-Known Member
Has the offending stuff been washed out of the hull, if not it will not dry.
My boat was done this winter and was pressure washed several times to get moisture levels down.
My boat was done this winter and was pressure washed several times to get moisture levels down.
eranb2
Well-Known Member
do i have to remove all the gelcoat?
eranb2
Well-Known Member
epoxy?
what should be the reading so I can start to repair it?
is it a good idea to coat with epoxy?
can I use any industrial epoxy or ONLY west system?
what should be the reading so I can start to repair it?
is it a good idea to coat with epoxy?
can I use any industrial epoxy or ONLY west system?
wotayottie
Well-Known Member
you have to wash out the gloop that is within the laminate and is hygroscopic. to do this you need to remove the gel coat in the areas concerned - after all, thats what osmosis means. a situation where a liquid can get through a semi permiable membrane like a gelcoat but cant get back out again.
as for time to re-occurr. well, nothing is totally impermiable to water and that includes the epoxy coat. so if your laminate has got osmosis once, it is likely to re-occurr as and when moisture gets back either through the epoxy or from the inside. hopefully this will be 10 years or so for a good osmosis job.
donmt like the sound of "a friend has measured it at 60 but I'm not sure he knows what he's doing". For the sake of the minor cost of a surveyor, get one in to check before you coat. you'll recover the cost when you sell the boat and can show the jobs been done right.
as for time to re-occurr. well, nothing is totally impermiable to water and that includes the epoxy coat. so if your laminate has got osmosis once, it is likely to re-occurr as and when moisture gets back either through the epoxy or from the inside. hopefully this will be 10 years or so for a good osmosis job.
donmt like the sound of "a friend has measured it at 60 but I'm not sure he knows what he's doing". For the sake of the minor cost of a surveyor, get one in to check before you coat. you'll recover the cost when you sell the boat and can show the jobs been done right.
eranb2
Well-Known Member
I will, thanks
PCUK
Well-Known Member
Epoxy is 500 times more water resistant than gel-coat, so well-worth using Epoxy. Any marine high build epoxy will be fine and West system will be equally good as you can also use it for fairing.
oldsaltoz
Well-Known Member
[ QUOTE ]
do i have to remove all the gel coat?
[/ QUOTE ]
Only if you are planning to treat the whole under water area, many people just do annual repairs as and if needed, treating a few spots at a time is no big number.
Have you ground out the effected areas, this will help speed up the drying if the areas are exposed. You should also hose them out every few days to remove the contamination.
I have had good results with West System Epoxy as the primary sealer.
Hope this helps.
Avagoodweekend......
do i have to remove all the gel coat?
[/ QUOTE ]
Only if you are planning to treat the whole under water area, many people just do annual repairs as and if needed, treating a few spots at a time is no big number.
Have you ground out the effected areas, this will help speed up the drying if the areas are exposed. You should also hose them out every few days to remove the contamination.
I have had good results with West System Epoxy as the primary sealer.
Hope this helps.
Avagoodweekend......
wotayottie
Well-Known Member
[ QUOTE ]
I have had good results with West System Epoxy as the primary sealer.
[/ QUOTE ]
bit more prone than most to amine blush - no problem in somewhere like Oz where its warm and dry but for an amateur (likely outside ) job here in freezing cold and damp UK, I would go for another brand.
I have had good results with West System Epoxy as the primary sealer.
[/ QUOTE ]
bit more prone than most to amine blush - no problem in somewhere like Oz where its warm and dry but for an amateur (likely outside ) job here in freezing cold and damp UK, I would go for another brand.
