Blisters! Is it Osmosis?

[minaret]

Originally Posted by psneeld

The problem with thinking blisters and not hydrolysis is that huge potions of many boats are possibly starting to delam (like mine) when the blisters don't seem too bad and the surveryor didn't catch it.

Then the unsuspecting new owner of a boat pops a few blisters, fixes them, slaps on some more bottom paint and heads for the islands where the warm water all year long is dissolving more and more resin and the delam is getting worse and worse.

Here's some laminate that much of it I could pull off by hand due to it's almost dry of resin yet didn't show up as delam yet to a tapping hammer..

Classic result of hydrolysis. This is why saturation is a bad thing.

[Crayfish]

Those who want to get rid of the hydrolysis products such as styrene and propylene glycol (apparently the culprits of osmosis) might try a homemade Hotvac. It's a tedious process as I've got only two heating mats but we are very happy with it and it works nicely (a total drying per square meter takes between 5 to 10 hours).

What's convenient about the custom made mats: The RAYCHEM self regulating heating cable sealed within the RPDM rubber mats heat resistant never exceeds (even partly) the max. temperature of 110°C (depends on the cable you choose, of course).

Regards,
Volker

[minaret]

Originally Posted by Crayfish

Those who want to get rid of the hydrolysis products such as styrene and propylene glycol (apparently the culprits of osmosis) might try a homemade Hotvac. It's a tedious process as I've got only two heating mats but we are very happy with it and it works nicely (a total drying per square meter takes between 5 to 10 hours).

What's convenient about the custom made mats: The RAYCHEM self regulating heating cable sealed within the RPDM rubber mats heat resistant never exceeds (even partly) the max. temperature of 110°C (depends on the cable you choose, of course).

Regards,
Volker

Excellent advice. Welcome to CF.

[Crayfish]

Thank you!

Here are some pictures and a graph of the poiling points in vacuum of water, Styrene and Propylene Glycol (the graph is not new to you, I assume).

Volker

[minaret]

Originally Posted by Crayfish

Thank you!

Here are some pictures and a graph of the poiling points in vacuum of water, Styrene and Propylene Glycol (the graph is not new to you, I assume).

Volker

Far from it. Do a forum search and you will note that pretty much every reference here to Hotvac is by me. Been using it for a decade.

[Crayfish]

Originally Posted by minaret

Far from it. Do a forum search and you will note that pretty much every reference here to Hotvac is by me. Been using it for a decade.

I know.

Regards
Volker

[minaret]

Originally Posted by Crayfish

Thank you!

Here are some pictures and a graph of the poiling points in vacuum of water, Styrene and Propylene Glycol (the graph is not new to you, I assume).

Volker

Originally Posted by Crayfish

I know.

Regards
Volker

I believe you would be doing the English speaking boating world a favor if you reproduced this info in its own thread here.

[Crayfish]

Originally Posted by minaret

I believe you would be doing the English speaking boating world a favor if you reproduced this info in its own thread here.

I'll try.