Answer to Steve Alcorn

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Posted by Bengt Blomberg on October 27, 2001 at 17:15:12:

Hello Steve,
For many years the IF were built in a sometimes very moist locality. Those built during the moist periods are very apt to hydrolysis. Now I guess yours is used in Swedish climate and if it has not had any epoxy coating I guess it is still not getting soft in the bottom. If you keep the blisters open by sanding and use antifouling only it should last for many years yet.
The type of bottom makes it very sturdy. However it is about 30% weaker than normal which makes it unsuitable if you want to do regatta sailing. Regardless of the bottom shape it goes "banana" if the back stage is set.
Heat treatment and the Osmocure drilling technique is the only way to regain the stiffness and because of the price level Osmocure has not been possible to introduce in Sweden. Now there is another treatment available which is suitable for Swedish yards also. If you are interested, ask a yard you know to go to the web site to get an offer for the equipment needed. Suitable epoxies they can get from Nils Malmgren AB in Ytterby, but never apply epoxy before a HYAB or HotVac treatment or peeling off at least half of the original laminate and relaminating with epoxy resin has been performed.
Regards Bengt

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