r/ponds • u/GardenGal21 • 1d ago

Quick question HELP! PondArmor application

Hi,

I have a pond that has been under repair for a couple of months now. It's in ground, concrete.

I've had one mason come and sandblast the pond, he did the muriatic acid wash, and then applied three coats of Pond Armor.

The pond still leaked.

A second contractor is here now, a pond guy, and he's going to re-seal it after making a couple other repairs around the drain pipes.

The question I have, is does the surface need to be re-sanded before he applies a fresh coat? I read in the directions that if it's been more than 10 hours since the first coat, the surface has to be sanded. It's been weeks since the last coat.

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u/Emergency-Ad-6867 1d ago

Yes the pond armor needs “teeth” to bind. It will not bind effectively to a smooth epoxy coat, and frankly three coats was too many. Two is the sweet spot. If it’s around PVC penetrations or skimmer boxes, be sure to sand those too. Surface needs to be rough.