I need to cut out and seal up a spot where Iron is causing a rust mess on the side of my plaster pool.

Chuckiechan

Well-known member
Jun 10, 2014
482
Roseville, CA
I have a rust stain caused by something metal trying to get through my plaster. I plan to drain the pool in late March/April and fix it. I also have some nicks and cracks in my plaster (I think from an earth quake). The pool isn't losing measurable water. Is this something that takes a specialist, or can I do it my self. I've got vibrating tools to cut metal, plaster, etc. What kind of pool plaster should I use. I was actually thinking of using un sanded tile grout with admix. I have some repairs around a bottom outlet where the plaster chipped away, things like that.

Ideas?

The plaster is ~ 20+ years old and still in pretty good shape and I'm not planning to replace it, thanks to following TFP's guidelines.

Thanks in advance...
 

ajw22

Gold Supporter
TFP Guide
Jul 21, 2013
23,657
Northern NJ
Pool Size
35000
Surface
Plaster
Chlorine
Salt Water Generator
SWG Type
Pentair Intellichlor IC-60
You probably have some rebar rusting. You need to chip out the gunite around the rebar, cut out the rusting pieces, patch the hole it leaves with hydraulic cement, and then patch the plaster over it. Use this for the plaster patches....

 

Chuckiechan

Well-known member
Jun 10, 2014
482
Roseville, CA
I'm using your ideas for the rust patch with hydrolic cement and the plaster you recommended.
I also have some "egg shell" cracks in my plaster that the mfg felt would not be successfully patched with their product. I also have a places around a drain where the plaster has lifted off. Do you know of any epoxy type sealants that might work? (White)
 

ajw22

Gold Supporter
TFP Guide
Jul 21, 2013
23,657
Northern NJ
Pool Size
35000
Surface
Plaster
Chlorine
Salt Water Generator
SWG Type
Pentair Intellichlor IC-60
If the "egg shell cracks" are just craze cracks in the plaster and not through the plaster I woudl leave them alone. Anything you do will be worse then what you have.

Post pics of the egg shell cracks.
 

ajw22

Gold Supporter
TFP Guide
Jul 21, 2013
23,657
Northern NJ
Pool Size
35000
Surface
Plaster
Chlorine
Salt Water Generator
SWG Type
Pentair Intellichlor IC-60
@onBalance would you do anything on that egg shell crack?
 

Chuckiechan

Well-known member
Jun 10, 2014
482
Roseville, CA
If the "egg shell cracks" are just craze cracks in the plaster and not through the plaster I woudl leave them alone. Anything you do will be worse then what you have.

Post pics of the egg shell cracks.
Obviously, the pool isn't drained so I plan to drain in mid April. I plan to do ascorbic acid bleaching, then pump out the pool, fix the little metal "breakout". The cracks may not be worth messing with but I would like to fix some broken out plaster by one on the secondary bottom inlet/outlets. The pool and plaster are nearing 25 years old thanks to TFP and it's predecessors. I'm older than dirt and don't plan on replastering.
D10CA3C6-DB1E-4144-B732-9A60270F0E42.jpeg
 

onBalance

TFP Expert
LifeTime Supporter
In The Industry
Jul 25, 2011
1,095
Utah
Yes, I would use some typical white epoxy to fill in those cracks. The cracks are probably caused by delamination.
Using normal plaster cement and sand wouldn't work well in this situation.
 
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