RCU Forums - View Single Post - That sinking feeling.....1/4 scale floats leak!!
Old 06-16-2019, 08:46 AM
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Originally Posted by Propworn View Post
Had a set of floats that did the same thing and everything we tried to seal them eventually failed again as the seams/cracks opened up. What finally worked was to fill them with expanding foam. We found a two part mix used for floatation in boats. You have to be careful not to use to much as the expansion of the foam will distort the float. We cut a few one inch holes along the top of the float then mixed up small amounts of the two part foam and poured it inside. The expanding foam filled the float a bit at a time as we did it in stages. The foam as well as filling the floats also glued everything together. These floats are still in use several years later. I suppose one could use the spray in insulation foam if one was careful. I even bet the polyurethane glues like gorilla glue and a spritz of water would expand and stick the floats together likewise.

PS the foam has to be closed cell so it does not absorb any water.

Thanks Dennis. That's quite an effort just to stop a leak or two. Will take in consideration.