How to repair in ABS grey water tank?

[sam-HILO]

I did a search for this and came up empty. While the RV tech was installing new tires they saw tape somewhere on the underside. It turns out it is on the sensors that don't show correctly. DH was doing investigation and found a small crack on the grey water tank. It is by the channel that the cable runs through. Never noticed any leaking. He put externabond tape on it. What is the correct glue to use for repairs. I would also use fiberglass screen. Thanks for all replies to help my tired brain out. HiLo must have had the tanks special made for the cable to run in the channel.

 

[JackandJanet]

If you want to use a glue, I'd use ABS cement and fiberglass fabric. Spread the glue over the crack and surrounding area after cleaning it and then press the fiberglass patch on. Coat the fiberglass with more ABS glue. Allow to cure and spread another layer of ABS over the whole area.

I also think waterproof aluminum tape would work to seal a crack.

- Jack