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Why Fiberglass Fails (and How to Fix It) | E010

August 26, 2023 · 19 min · 11K views

What this video covers

Restoration of a 1989 Liberty 458 involves repairing holes in the hull's lower skin to prepare for new core installation.0:03 The process requires grinding the fiberglass to a thickness of approximately 120 thousandths of an inch, then scarfing in two to three layers of 1708 fiberglass cloth.1:35 To ensure structural integrity, the repair uses West System 105 epoxy mixed with 403 microfiber for adhesion.6:17 Peel ply is applied over the final layup to manage resin content and create a smooth surface for subsequent work.8:01 The owner also removes a forward holding tank to clear workspace, prompting a decision on whether to replace the standard marine head with a composting toilet.10:30 A critical error occurs when the initial fiberglass layer is applied to a contaminated surface, forcing the removal and re-preparation of the area with acetone before a successful second attempt.16:44 Proper surface preparation with solvents is essential for ensuring epoxy adhesion in multi-stage fiberglass repairs.17:40

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Boats in this video

Liberty 458Their boat

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