Mixed up some epoxy resin and coated the inside of my mother-in-law's fountain garden feature. It's a cheap thing she's had for 8 years, but started to leak this year so it hasn't been used for a while.

I made up 300g of liquid epoxy and poured it in coating the base evenly. After a an hour some sticky epoxy dripping out of the bottom, so I'm hoping it's plugged the holes.