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Thread: using RTF silicone

  1. Back To Top    #1

    Join Date
    Jul 2009
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    using RTF silicone

    we had an issue with sand in our multi-port valve to the point where we couldn't move the port handle. We ended up taking it apart and putting it back together. a few days later, we realized that we were losing water through the waste hose when the pool was set to filter. I opened it up again and determined everything was OK, except that the rubber gasket that surrounds the various port entries/outputs probably needs some RTF.

    how important is it that the surfaces remain completely dry while the RTF is drying? it says it needs 5 minutes to create a skin and 24 hrs to fully cure? there is water constantly in our valve, so i dried it as best i could before applying the silicone and the gasket.. but within minutes, it was covered in water because of the leveling of the water in the DE filter, i think. do I need to drain the filter before i do this? and do i need to apply pressure to the gasket to make sure a seal is formed?

    thanks so much,
    patty
    25,000 gallon gunite pool with waterfall (built 2000 - owner as of 2009), Aerotemp / Aquacal heat pump AT12000-A, Hayward DE4800 Filter, AOS UST1202 Motor, Hydro-King T104P201 Timer, Meyco pool cover, Pentair Model 320 Auto Chlorine Feeder. Located in Massachusetts.

  2. Back To Top    #2
    Richard320's Avatar
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    Jan 2010
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    Re: using RTF silicone

    RTV silicon probably isn't a good idea for this application. If it isn't fully cured, it will smear and then glue everthing together. What it does is grabs moisture from the air and uses that in the process that makes it Room Temperature Vulcanizing. Just because it skins doesn't mean the whole thing is solid. I use it at work, we call it Form-in-place-gasket. It won't fully harden for hours.

    Unless the valve is some archaic thing, the local pool store probably has a gasket for it in stock.
    16K freeform gunite with spa; Pentair 4000 DE filter; Century Whisperflow 1 HP; Pentair Minimax heater.
    Troublefree does not mean Maintenancefree. It's like brushing your teeth: You can spend a couple minutes a day and pennies a week or go to the dentist once a year and spend several thousand dollars.
    A pool is like a pet - you have to feed it every day, even the days you don't want to play with it!

  3. Back To Top    #3

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    Re: using RTF silicone

    Get a new gasket and use a silicon lube (not rtv gasket maker) made for pool gasket/o-rings.

    Doug

  4. Back To Top    #4
    solarboy's Avatar
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    Re: using RTF silicone

    I'm sure I remember reading somewhere that the gasket should be glued in place with "superglue".
    Self built 5500 gallon bare concrete (temporarily) pool with limestone coping, Pentair Swimmey 1/2 HP pump, Triton sand filter with DE, Simpool peristaltic muriatic acid pump with pH sensor and Monarch SWG. Home made solar heater with Pentair Compool control panel and 3 way valve. 1 skimmer, 1 main drain, 2 returns, 2" plumbing, Hayward auto fill valve.

  5. Back To Top    #5

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    Re: using RTF silicone

    Ok it may be a different style than I'm thinking of.

    Doug

  6. Back To Top    #6
    JasonLion's Avatar
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    Re: using RTF silicone

    There are about a dozen different ways of putting in spider gaskets I've seen recommended. Silicone and super glue are two of the more common recommendations.
    19K gal, vinyl, 1/2 HP WhisperFlo pump, 200 sqft cartridge filter, AutoPilot Digital SWG, Dolphin Dynamic cleaning robot
    Creator of PoolMath and Pool Calculator. Other handy links: Support this site, TF Test Kits, Pool School

  7. Back To Top    #7

    Join Date
    Jul 2009
    Location
    Massachusetts
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    Re: using RTF silicone

    so RTV silicone is OK to use? but I need to keep it super dry while it cures?
    in the meantime tho, while trying to get the handle back on the valve, I ended up breaking the key/valve assembly.. so now i need to buy another one... this is the worse pool opening of my life (at least i hope it is, since it's actually only my 2nd pool opening)
    25,000 gallon gunite pool with waterfall (built 2000 - owner as of 2009), Aerotemp / Aquacal heat pump AT12000-A, Hayward DE4800 Filter, AOS UST1202 Motor, Hydro-King T104P201 Timer, Meyco pool cover, Pentair Model 320 Auto Chlorine Feeder. Located in Massachusetts.

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