J-B Weld Waterweld
This is a white epoxy putty will plug holes and make permanent repairs in moist surface or under water applications.
Waterweld is non-toxic and approved by NSF for use with potable water
Compressive strength 12,000 PSI
Will fully cure in 20 minutes
Once cured, the product can be painted, sanded, and machined
Lap shear tensile strength is 900 psi
Marine repair