Thread: Does anyone know what I could use to fix a leak? - Yahoo! Answers

Bah! Forget replacing it. Try JB Weld. It is a two part epoxy that will seal and/or attach anything. I've used it on everything from concrete to radiators. Available at auto parts or home supply stores.

I have an acrylic sink. Today I had some water on the bottom of the sink base. I thought it was the plumbing and checked that thoroughly and I found the sink has small cracks at the bottom and the water is dripping out through there. I used some clear caulk sealer and smeared that on the bottom of the sink, but my question is this... The underside of the sink is fiberglass, I would like to get some type of waterproof sealer that I could paint...

Since the bottom is fiberglass, you can repair it with a fiberglass patch. You can buy this at an auto parts store. They sell all kinds of stuff to do this but just get the patch kit. I don;t recall if it comes with hardener but you can buy that as well. ( not very expensive) Make sure to follow instructions and it will work for you. You will also need some sandpaper, but since the repair will be on the underside it doesn't need to...

there is something called stop leak you can get at the hardware store, but I have never used it and dont know how good it is. I think you should replace the whole sink before it really gets wet under there and ruins your floor and your cabinets. It can get really moldy wet and nasty.

If the sink has cracks, it is better to replace than try to patch. It may just break completely when least expected.