Entre Terras e Mares · video

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The owner of a boat under construction re-installs polycarbonate windows after the initial adhesive bond failed.0:16 The original installation used 3M VHB double-sided tape for structural fixation and Down Seal polyurethane for perimeter sealing.0:43 The bond failed because the sealant overlapped the tape before the polycarbonate made contact, preventing the tape from adhering properly to the window surface.0:58 Additionally, the curvature of the hull created tension that pulled the window away from the frame at the point of the sealant overlap.3:38 To correct the installation, the crew removed the old adhesive, cleaned the surfaces, and applied the 3M VHB tape first to secure the window.4:17 They applied the sealant only after the window was fully seated to ensure the tape provided the primary structural bond.9:08 The crew successfully re-installed three windows using this revised method.13:17 Proper sequencing of tape application before sealant prevents bond failure in frameless polycarbonate window installations.

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