Got a pool light leaking in a gunite pool.
I have found the leak at the point where the light ring and the niche join together. (Pool is 16 years old).
The water temp is about 50 degrees F. I have tried to press the Anderson butyl tape into this leak and was unsuccessful. I would not adhere to the stainless steel niche nor the ring.
I then pressed a two part epoxy into the area and this seemed to stick though I am concerned about how long this will work.

Any suggestions.

It will work till it doesn't.
I had to get a snark in there...
I like the flexible sealer that is sold on this website for these repairs although we've done a ton of 'em with epoxy. Not usually stress on this repair so it should last. Did you warrantee it?

Yes it usually lasts a long time, When I find this type of leak I make sure to clean it well with scotchbrite and or a toothbrush so you can squeeze the epoxy thru the rotted areas of the ring and I seal over the entire ring to reduce future corrosion, tougher to do in cold water, I have one set of mitts with the fingertips cut off for jobs like this.
Bruce

I use quick drying cement if the gasp is large enough. Works well never had a go back, of course sometimes you have to use pool putty and it works to.

@brrscuba nice avatar

i keep several brass automotive type cleaning brushes in my leak kit.i pick them up at a dollar store. and when i find a combo pak of the smallest kind grab a years supply.
the brass cleans lite conduit and cracks and stuff before i use butly putty or fast set putty.
brass is softer than steel and doesn't burn plaster. also softer metal conforms to lite conduit or whatever .less stress more clean.

big avatar!!!