Comments about Bondo Bondo-Hair Long Strand Fiberglass Body Filler:

Overall great product and very easy to use but I question its use in marine applications. I have repaired several canoes/boat hulls with this product and seemingly it has preformed well.

My only question/comment is that it does not specifically say whether or not it is okay to cover with fiberglass.

Comments about Bondo Bondo-Hair Long Strand Fiberglass Body Filler:

I have rotten wood on the sill touching my foundation and will need to jack up the house and replace in a couple years. I used Bondo-Hair as a temporary patch to seal the rotten area after treating it with a rot-killer. I needed to take small clumps of the product at a time and mix it with the hardener which took some time and became messy toward the end, but the result was a waterproof seal that is very moldable before it sets. It's waterproof, doesn't shrink, and is extremely strong. Adheres to anything.