Greetings all!

I have a spa which is surrounded by a concrete surround. Water was
seeping out from a seam in the concrete and, after some detective work,
it seems the culprit is a bad seam in the skimmer: The plastic skimmer
connects with a plastic riser at an angle, and the plastic-to-plastic
join must be poor, and when the water rises to a certain level, water
seeps into the concrete, and then is slowly released by the concrete.
Since we lowered the spa water below that join, the seeping has
stopped.

So my question is what product is best for sealing a plastic-to-plastic
join, which will usually be under water that is hot, and is
chlorinated? Do I want a flexible seal, or a non-flexible seal? There
is some product I saw at our pool supply store called "A+B Epoxy
Putty."

http://www.lesliespool.com/shopping/...d uctID=14054

I believe this product provides a non-flexible seal, so I wasn't sure
if this was ideal for my situation, or if something more "rubberized"
would be better.

Any advice at all on this matter is greatly appreciated!

Chuck