Brief: Looking for recommendations on a product to improve the seal of 2 joined plastic pipes (narrower pipe wedged into wider one) that is non-permanent + water and hot/cold resistant?
Details: I have two plastic pipes (similar to PVC pipe) which is part of an Enersol solar pool heating panel that fit together, one into the other with a locking pin to hold them together. The fit is too loose and they leak constantly (we have had endless problems with these).
As far as I can tell they are not damaged, just that the pipes don't fit snug enough. I want to make the seal better, but it can't be permenantly cemented together because if one panel needs to be replaced they have to come apart.
I was about to try a wrap of teflon-tape around the inner pipe and try that, but it occurred to me that there might be a product meant specifically for this. Needs to be waterproof, and fairly heat/cold resistant. It is on the roof.
Disclaimer: we are not handy at all.
Thank you kindly.