Silicone curing time

Discussion in 'Anything DIY Related' started by sandlewood, 29 Mar 2010.

  1. sandlewood

    sandlewood

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    I have just increased the height of one of the baffles in my sump by siliconing in a wedge of glass on top of the existing one. The has obviously required a shut down of my return pump.

    What is the min curing time for the silicone? I would obviously like to keen "down time" to a minimum. The glass wedge is 480mm long and 60mm high.
     
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  3. viper357

    viper357 Admin MASA Contributor

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    Ideally 24 hours minimum. Did you silicone along the bottom and then up the sides as well?

    At a push I suppose you could check the tension after say 5 or 6 hours. Try move the glass gently and if it feels pretty solid then you could try chance it, you'll have to judge how much pressure you think will be pushing against the glass.

    Will there be water right up to the top on both sides of the glass? If so then you should be fine as there will be pressure pushing from both sides and it should hopefully stay in place.
     
  4. Tobes

    Tobes Retired Moderator

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    Howzit Johan, usually a day or so - when it's dry to touch and not smelling strong anymore it should be fine - obviously if it needs to handle some pressure then it should be left until completely dry right through.
     
  5. butcherman

    butcherman Moderator MASA Contributor

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    if you switch on the return pump will the water cover the silicone?
     
  6. sandlewood

    sandlewood Thread Starter

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    Hi Tobes - How are you doing?

    Yes the water will cover the silicone and will actually flow over the top of this new piece and down into the next chamber which will have a water level about 5 cm lower.
     
  7. Tobes

    Tobes Retired Moderator

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    I'm fine tanks Johan :)
    How about an update shot of your tank?
     
  8. butcherman

    butcherman Moderator MASA Contributor

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    what silicone did you use the marine slicone i got at the hardware recomends 24 hours but i did a repair with only 8 hours.
     
  9. sandlewood

    sandlewood Thread Starter

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    Same one. Bostick Marine Silicone. It's pretty hot here in PMB at the moment so was hoping to try my luck after 6 hours or so. I am a bit worried about acetic acid leaching into the system if not properly dry - ph issues and livestock.

    Also I have water circulating in the main tank although not through the sump so should probably be ok until tomorrow.

    What do you think.
     
  10. Tobes

    Tobes Retired Moderator

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    Your tank will do fine until tomorrow - just make sure there are plenty surface movement for oxygen and better gas exchange as the skimmer is cut off for now. I doubt whether it will be necessary to put the heater in the display :p
    You might need to put an airstone over the DSB area to prevent oxygen depletion in the sump ;)
     
  11. sandlewood

    sandlewood Thread Starter

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    Thanks Tobes!
    I will post some pics soon. I have moved my sump outside (plumbed throgh the wall) and have built a large remote DSB which has a pick up via a pump in the sump return chamber and feeds back into the system via the first chamber with the skimmer. This new DSB is mounted over the sump so pumps water up from return chamber through the DSB and back down into the sump. What do you think?

    This pump has caused the extra flow, hence the need for the modification.
     
  12. Tobes

    Tobes Retired Moderator

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    Sounds good, but a 100 pics speaks a thousand words :razz:
     
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