I used sani-tread to do my decks and can attest to itís great adhesion and elasticity
The primer will anchor
to any roughed up surface and then the 2nd partÖ Liquid Rubber Base (LRB) bonds incredibly with the primer.
I think it would work well as bottom protection and can definitely fill in any voids or damages on an older hull
(any material) as you can add a thickening gel so as to putty it on.
Not sure if it has antifouling properties by itself and the danger
if you apply it, then need to apply an antifoul paint
on top of itÖ you would need to find a flexible antifoul paint
that matches the elasticity of Sani-Tread.
Here are some photos of us applying the rubber non skid chips over the wet primer, before we poured on the LRB then painted with a topcoat. (which is same as primer except with U/V properties
I was disappointed with the Sanitread Topcoat as I found it got moldy and stained during the rainy season. The manufacturer said we could coat it with any paint which is where I found the epoxy
on top was not flexible enough and started to craze.
We finally went with an elastomeric roofing paint that is working very well and looks great.
The biggest problem if you used sani-tread on your bottom, would be trying to get it off, if you didnít like it