Leaking HOB 2-gallon refugium. How To Fix?

[ReefWitch]

My Aquamax HOB Multi filter with protein filter (https://www.bulkreefsupply.com/aquamaxx-hf-m-hang-on-back-multi-filter-with-protein-skimmer.html) Is leaking out of the seams and I need to know how to fix it before I get 2-3 gallons of water dunked onto my carpet.

It is about a year old now and I know why it is leaking, (I had the refugium light way too close to the water, and it damaged the sealant).

I need to know how to fix it. I think I need to drain it and re-seal the inside but what kind of sealant do I use for hard plastic? Is there any advice anyone can offer to help?

 

[mav3rick478]

If it's acrylic than get some weld-on 16 thick acrylic adhesive