Perking up silicone on an old tank?

Discussion in 'Anything DIY Related' started by RocketRooster, 19 Dec 2012.

  1. RocketRooster

    RocketRooster

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    Hi guys,

    Is it possible to remove the old silicone from a tank with a sharp blade (just the bits that sticks out - not the actual silicone between the mating surfaces), and then give it a once over with fresh silicone? Will this affect the strength of the tank in any way?

    Thanks!
    Riaan
     
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  3. irie ivan

    irie ivan MASA Contributor

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    Would not recommend it. If I understand you correctly. Old silicon does not like new silicon. Best to do a total removal, both physical and chemical and redo the whole job.
     
  4. RocketRooster

    RocketRooster Thread Starter

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    This answer hits the spot!

    What does one use to remove residue? Acetone?

    Redoing it - never done anything like it before. I'd attempt it with a small tank, say, a std 3 footer. But the tank I'm getting is a big 2m mofo.

    Best to leave it to experts?
     
  5. irie ivan

    irie ivan MASA Contributor

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    Honestly cannot remember the chemical. Considering the work involved, I'd simply:

     
  6. RocketRooster

    RocketRooster Thread Starter

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    That sounds like the best advice I've had all day (and it's been a bloody long day, too!)



    How long does silicone last in a tank before its integrity starts becoming suspect?
     
  7. Nemos Janitor

    Nemos Janitor

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    Well an option that we do is to cut out the old silicon filler and silicone in glass strips. If the silicone is coming loose at the filler then it will be coming loose at the joint as well.

    I would not just cut out the filler and re-silicon, as the filler forms no structural purpose. The seal is at the but joint. To completely strip a tank is very time consuming and the risk of damaging a panel is very high.
     
  8. RocketRooster

    RocketRooster Thread Starter

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    You're just saying that to butter me up for the next anticipated question: how much to redo a 2m tank? :lol:
     
  9. Nemos Janitor

    Nemos Janitor

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    You buy the glass strips and silicone and i will show you how to do it.
     
  10. RocketRooster

    RocketRooster Thread Starter

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    P.S. The thin black rim look is growing on me, so if you said the filler doesn't really perform a structural function, would it be okay to slice out the old filler and give it a replacement bead of black silicone?
     
  11. RocketRooster

    RocketRooster Thread Starter

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    What is a glass strip?
     
  12. Nemos Janitor

    Nemos Janitor

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    Depending on the tank size glass strips are siliconed into the corners of the tank. This is done on very large tanks for structural strength on the join or as a repair. The PIC's I post or of one of my tanks redone some years ago. These strips are 10mm glass cut to 25mm. The first PIC shows how the original seal started to pull. That is the green glass edge to the left with the lighter bubbles to the right. The next stripe in that pic is the good 10mm seal. There are no air bubbles. The next stripe it the filler where algae has gotten underneath.
    [​IMG]


    This next pic shows the 25mm side of the glass strip. You have from the left. filler silicone, 25mm glass strip then the dark green is the glass joint. the lighter stripe just before the dark glass joint is filler silicone. this has algae in and on it.


    [​IMG]
     
    Last edited: 19 Dec 2012
  13. RocketRooster

    RocketRooster Thread Starter

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    Very clear explanation. Thank you!
     
  14. ccwilke

    ccwilke Majestic Pets Solutions Sponsor

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    I took apart an old tank cleaned of all old silicone and assembled it again with new silicone for the sump.Now I still have to do the display with black silicone.You could always give @ Rhyn a call he helped me.
     
  15. RocketRooster

    RocketRooster Thread Starter

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    Sounds like a kak job tho :D
     
  16. ccwilke

    ccwilke Majestic Pets Solutions Sponsor

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    @RocketRooster it is a kak job you need to even remove the residue of the old silicone.But with good help it's done in no time.
     
    Last edited by a moderator: 26 Nov 2015
  17. RocketRooster

    RocketRooster Thread Starter

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    What did you use to strip it to squeeky clean glass?
     
  18. Nemeziz_za

    Nemeziz_za

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    Also interested to hear what you used
     
  19. ccwilke

    ccwilke Majestic Pets Solutions Sponsor

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    You can use fish line or an old measuring tape to cut the panels apart then you use a stanley blade and scrape it of.Then you use these green rough spunges that the women use to was pots with and some spirits.You then just scrub it untill clean
     
  20. RocketRooster

    RocketRooster Thread Starter

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    Ah, ok. Thanks! I thought acetone or something hectic was involved.
     
    Last edited: 4 Jan 2013
  21. the fish

    the fish

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    acetone... not unless the tank is wearing false nails :lol:
     
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