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Go Back   SailNet Community > General Interest > General Discussion (sailing related) > Blisters, OMG
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Topic Review (Newest First)
01-22-2014 10:44 PM
Markwesti
Re: Blisters, OMG

Fix your blisters you'll be glad you did . Come on It's fun !
01-22-2014 10:24 PM
christian.hess
Re: Blisters, OMG

barrier coats yes...but its the prep that is expensive and yards want to charhe you in the range oif 5k to simple sand away the outer damaged layer...and charge you another 2-3k in new glass and resin and barrier coat then primer, then antifouling


on the topic of blisters...heres one for you

on myth busters they made a golf ball CAR...

it had better performance and less drag than the smooth version so whoever makes a golf ball underbody or hull underwater has my nod first

just sayin till you try you cant say blisters affect hull ´performance its totally dumb...in fact probably quite the opposite, jajajaja

and a huge money maker!

for example doing a barrier job on some old plastic classic thats worth 1k makes about as much sense as buying a new boat from westmarine with their fantastic prices ajajajajajajajajajajaja

peace
01-22-2014 03:32 PM
pforeman98
Re: Blisters, OMG

I've heard talk of barrier coating that can end the blisters, once they are properly fixed. Anyone?
05-28-2013 10:44 PM
KeelHaulin
Re: Blisters, OMG

The first fiberglass layer is strand-mat; which is non-structural. The strand-mat is placed beneath the gelcoat to prevent print-through of the fiberglass cloth. The problem with strand-mat is that it will not fully wet with resin and the voids allow moisture to wick in and form blisters. The blister won't continue through the woven glass if it is fully wetted with fiberglass; but if there are voids or non wetted glass beneath the blister it can travel through the skin layer on a cored hull. I'd rather fix the blisters on a cored hull than need to replace/re-core entire sections of hull if the core rots.
05-28-2013 02:07 PM
luck66
Re: Blisters, OMG

Fixing blisters is very important. If you let them go they will grow over time and damage the first fiberglass layer. If that happens it is a very big job to skin off the damaged fiberglass and replace it.
05-28-2013 10:38 AM
RonRelyea
Re: Blisters, OMG

I think I've posted this before, but I consider this guy to be pretty well versed in blisters. David Pascoe has surveryed LOTS of boats and has LOTS of experience as opposed to us here on this forum who have had experiences with one or two boats and a lot of hearsay.
Good information here.
Hull Blisters on Boats and Yachts - by David Pascoe, Marine Surveyor
05-28-2013 09:15 AM
zeehag
Re: Blisters, OMG

if your blisters are size of watermelons, then fix em...lol
most stay at around quarter(25centpiece) size.
if they tunnel or grow larger or hole selves in center(become wet) then fix each one. i did that--isnt fun but it works==the blisters donot affect performance, btw....
05-28-2013 02:24 AM
KeelHaulin
Re: Blisters, OMG

All of that is fine; but as I said before if the hull has balsa or open cell foam and some of the blisters wick water through the skin layer of cloth you could end up with a hull that is not structurally sound. It makes little difference to me if a boat has blisters (in a solid glass hull) or the topsides are not polished; to each their own. The important part is the structural components and if those are failing or in danger of failing the underlying problem should be addressed otherwise the boat is not very seaworthy.
05-28-2013 12:11 AM
Frogwatch
Re: Blisters, OMG

The entire concept of racing sailboats eludes me so whatever a racer thinks makes his boat go faster is fine with me. However, for us cruisers, even with blisters the size of watermelons I think my boat could be made to sail better than I am able to sail her so I don't worry about many small ones affecting her cruising performance.
My boat is very old and looks like crap but works great. OK, I have very low standards of comfort and my entire reason for going sailing is cuz I like to solve unexpected problems but I've managed to cruise a lot with a poxed boat.
So yer boat has blisters. Slap a coat of bottom paint on, shrug your shoulders and put her back in the water where you can't see em, problem solved.
05-26-2013 04:00 AM
KeelHaulin
Re: Blisters, OMG

Quote:
Originally Posted by Frogwatch View Post
My 1981 S2 has gazillions of blisters that do not affect her at all.
If it's a balsa cored hull model (as many S2's were) I'd be checking more closely for wet core than carrying the assumption that the blisters don't affect the hull of your particular boat. If the boat is non-cored you are OK but if it's cored I would suggest stripping it down, fairing the blisters (or re-glassing the strand mat with a layer of cloth) and then barrier coating with epoxy.
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