Mailport: January 2012

Blasting & Adhesion

In the December Mailport letters, questions were raised concerning adhesion. Adhesion failures are due to improper prep. A boat owner is well advised to freshwater rinse the hull, then solvent wipe to remove oils after sodablasting. We have seen cases where there is still mold release wax on the hull, preventing good adhesion from the beginning. After the hull is cleaned, it must be sanded with 80 grit on an orbital sander for good adhesion. Painting directly after sodablasting is a recipe for failure.

Jay Knobbe
Larsen Marine Service Inc.
Waukegan, Ill.

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