An RVer asked whether Sikaflex 219 would work to bond a fiberglass rear panel back to the metal frame instead of using the more expensive 3M panel adhesive. Members shared mixed alternatives, including JB Weld, Gorilla Glue two-part epoxy, 3M/4200, body panel adhesive, mechanical fasteners, and even spot ties, with several noting that flexibility and adhesion strength may differ by product.
Several members agreed that surface preparation is critical, including removing old adhesive...
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An RVer asked whether Sikaflex 219 would work to bond a fiberglass rear panel back to the metal frame instead of using the more expensive 3M panel adhesive. Members shared mixed alternatives, including JB Weld, Gorilla Glue two-part epoxy, 3M/4200, body panel adhesive, mechanical fasteners, and even spot ties, with several noting that flexibility and adhesion strength may differ by product.
Several members agreed that surface preparation is critical, including removing old adhesive, roughing the metal and fiberglass, cleaning with solvent, and following the adhesive instructions closely. The original poster chose a panel bonding/body epoxy, applied it, and planned to let it cure for a day before reinstalling the panel, but there was no confirmed long-term result for Sikaflex 219 specifically.