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Little Falmouth Yacht Yard

Flushing, Falmouth

Cornwall, TR11 5TJ

What is osmosis?

Here is an example of one of the worst cases of osmosis we have seen in a while.

What is osmosis?

The outer layer of your boat composition (gel coat) is not completely waterproof.  Over the years, tiny amounts of water find their way through its ever-so-slightly permeable surface. This can then react with uncured chemicals in the glass fibre mat beneath, causing a by-product of pressure. This builds up to cause the blisters to appear.

Don’t panic as there are ways to fix it.

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