Lagoon catamaran gelcoat blistering

[Mark Rolle]

Seems Lagoons do get blistering if they have a defective layup and gelcoat or if you don't maintain the barrier coat regularly....what's yours like under the antifoul?

https://youtu.be/Y85afCdzRxA

[Tin Tin]

Self promoting video on 15 year old boat, don’t recall Lagoon back then using vinyl ester, Leopards did.

[Mark Rolle]

Owners manual states vinylester was used as an anti osmosis barrier. below the waterline..... No self promotion intended. or anything to be gained...just to advise owners that a barrier coat needs to be maintained as Lagoon doesn't advise about underwater maintenance recommendations. Also to show a technique for identifying voids in the gelcoat not visible in daylight......but you would of seen that if you watched the complete video.

[rabbi]

Yesterday I finished strippping our 2015 Lagoon 380 back to gelcoat as I am moving to Coppercoat.

Last haulout I bribed them to use the high setting on the power washer which opened a few tiny voids.
I found a larger void by poking around a tiny small crack that I found at the bow.
Low quality gelcoat paintjob at the centerline seam where the 2 hull halves are joined.

Other than that: Excellent condition. Not a single blister anywhere, no cracks, nothing.

Also nice to see that the boat truly never had any groundings or damage.

[Mark Rolle]

Great to hear Rabbi and its good to know the underlying condition

[rabbi]

I have owned a 1999 410, a 2008 380 and now a 2015 380. No problems on any of these.
We always use dry storage for winter, and I always have a close look at all other cats I see in the yard. I am pretty sure I have seen 50+ Lagoon out of the water. Right now there are 6 (!) older Lagoon 380 wintering next to me in the yard.
Again I have _never_ seen anything like your problems. I have seen blistering, but that was always due to bad repairs. Never blistering all over the place.

Somehow I suspect yours was a either a testbed for some new gelcoat formula at the factory. Or someone messed it up later. Maybe they did not apply the initial barrier coat during commissioning? Or maybe a previous owner already had it blasted and failed to seal the gelcoat properly.

Whatever the cause was: This is not the usual Lagoon problem.

2008 was the time when Fountaine Pajot had major blistering issues.
Maybe your boat is a FP?
Or maybe it doesn't feel like a Lagoon and considers itself a FP?