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Hull Cleaning and Diving Services

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Hull Coatings & Substrate

HULL COATINGS:  A quality barrier coat & anti-fouling paint application are crucial to the structural service life of any hull. Together, the barrier coat and bottom paint act as the main barrier between the outside water and the interior substrate. Though initially more expensive, the cost effectiveness of superior paints are obvious when you look at their multi-season performance, ability to be relaunched and no-buildup, self-polishing nature. We recommend discussing with the boat yard about their application processes and demand multi-layer thin coats opposed to one thick coat. Inferior applications will result in paint blistering and paint flaking, causing water to permeate through the gelcoat and into the hull substrate; resulting in costly time & financial repairs. http://www.boatus.com/boattech/articles/bottom-line.asp

PAINT BLISTERING:  This process is similar to hull blistering but is referring to the bubbles or blisters forming under the paint itself. Inevitably this will result in paint flaking. It is imperative to apply coatings according to manufacture specifications. We typically see paint blistering appear within the first 6 months of a new bottom job. Experienced divers will note paint blistering and if counteractive measures are taken by the owner it can result in dramatic savings. Most bottom paint applications have a 1 year warranty and noting these problems early will always eliminate headaches down the road.  https://international-yachtpaint.com/en/au/support/boat-paint-problems/blistering-bubbling

PAINT FLAKING:  As we know, bottom paint and the barrier coat work together to act as the primary layer between your vessel and the underwater elements. Paint flaking creates a void in this duo and over-time could become ground zero for a hull blister to appear. As diver's clean and inspect the hull, they will note the size and quantity of any paint flaking that they find.

HULL BLISTERING:  Also known as osmotic blistering or hydrolysis is the terms used to describe small particles of water passing through the gelcoat and into the hull laminates. As soon as the water enters into the laminate it begins to dissolve any soluble materials within the laminate. The dissolved laminate molecules are too large to exit the substrate and as time passes, the blistering gradually increases. Please see the article below and refer to page 4 for a more detailed description about this process.  https://www.westsystem.com/wp-content/uploads/Gelcoat-Blisters-Diagnosis-Repair-and-Prevention.pdf

DELAMINATION:       This process is referring to a more horizontal release of the layers of fiberglass along the outer hull substrate. Overstressing and high impact to the hull can cause tiny cracks or small voids in the hull materials. Over time, through normal wear, vibrations and impact, the fiberglass layers begins to peal or release from itself. We typically see this where repairs have been made without proper compression of the fiberglass-resin-gelcoat application. 

Call us at (850) 696-2828 or fill out our Contact Us form to schedule a service.