efflorescence—new gunite shell

2times

In The Industry
Jul 1, 2020
3
Florida
Hello all—I would like to get some of your thoughts on efflorescence on a new gunite shell. The pool is ready to be plastered and I noticed a few marks. Was wondering if there are any precautions needed prior to plasterIng it, like grinding it down and applying a bond kote to seal it or will it be fine plastering over it. I do not want to have issues down the line if it will eventually seep through the plaster. Also, for those that have plastered over it, was wondering if you ran into any issues—Thanks in advance, appreciate the feedback!
 

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jkxpooldesign

Well-known member
Jun 27, 2019
70
Florida
Hello all—I would like to get some of your thoughts on efflorescence on a new gunite shell. The pool is ready to be plastered and I noticed a few marks. Was wondering if there are any precautions needed prior to plasterIng it, like grinding it down and applying a bond kote to seal it or will it be fine plastering over it. I do not want to have issues down the line if it will eventually seep through the plaster. Also, for those that have plastered over it, was wondering if you ran into any issues—Thanks in advance, appreciate the feedback!
I have the same efflorescence in my gunite as well. I've read that plaster will cover it up and it should be ok. However, I'm far from an expert and I am also curious in the expert's replies.
 

2times

In The Industry
Jul 1, 2020
3
Florida
Far from an expert in the gunite realm as well...I’ve read the same about the plaster will cover it up, but was hoping for someone that had it, plastered it and has not had a problem since.
Jimmie48
Did they grind it down or apply bond kote to it or you plan on plasterIng over it. Thx
 

jkxpooldesign

Well-known member
Jun 27, 2019
70
Florida
I read somewhere that wet curing your shell could cause efflorescence. I know for 7 days I was on it so I'm thinking likely that is the cause. Hopefully, it's a non-issue as I've read through various searches in TFP.
 

bdavis466

TFP Expert
Platinum Supporter
Aug 4, 2014
5,523
San Clemente, CA
That's very normal and I haven't heard of it being an issue. There wouldn't be anything wrong with chipping it off before plaster if you chose to do so.
 

2times

In The Industry
Jul 1, 2020
3
Florida
Thank you for all of the replies. I grinded them down and acid washed it. You can’t tell it was ever there....plaster on Tuesday. On a side note I did contact the plaster manufacturer and my rep stated that if left it would bleed through the plaster eventually, with that said I was not taking any chances with it. Thanks again!