Guess my verbiage wasn’t as concise as I thought.
How much do you need to raise the top surface for it to drain properly?
I had in mind to use a 2 part urethane system.
Hardens in 5 minutes and is machinable , here is a link for you to check out.
https://www.reynoldsam.com/product-c...thane-plastic/
I have used this to pour/level/fill thresholds on concrete.
Sent from my iPhone using Crappie.com Fishing mobile app