Fixing a hole in an aluminium boat without welding. In this video I repair a couple of holes in the transom of an aluminium boat using Sikaflex, an aluminium patch and some rivets. This technique is great if you don't have the option to TIG weld a plate onto the boat.
There are ways of making it even more water tight than shown here: you can put a patch on both sides of the hole and you can coat one or both sides in an epoxy paint.
Be sure to give the Sikaflex plenty of time to dry before either painting or putting the boat back in the water!
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