bought used acrylic tank - want to permanently seal a bulkhead near the bottom I cannot remove.

[Troylee]

ok tyvm.. I was looking for 40 and 42 and it wasn't nearly as available as 16 and complaints about old stock and shelf life on 42. I'll get the pint of 16. Thanks again

Yeah it takes special applicators also.. it’s not worth it for a one time deal but someone like myself who uses it daily I have plenty of uses for it at my job lol… you can get a pint of 40 if ya want but you gotta mix it yourself “it’s similar to fiberglass resin” and put it a ketchup bottle but you got a short period of time before it hardens…. You’ll be fine with 16 for what you wanna do.