Is GE Silicone II safe for my aquarium??

Discussion in 'Equipment, Lighting, Hardware, Aquarium Filtration' started by Mr E Wrasse, Aug 20, 2010.

  1. Mr E Wrasse

    Mr E Wrasse Well-Known Member R2R Supporter R2R Excellence Award

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    I'm almost done with my 40breeder setup and need to silicone the overflow. I picked up some GE Silicone II from Home Depot... It is 100% silicone and doesn't say anything about any mold inhibitors.. I'm pretty sure i've used the same stuff on my aquariums before, but I never noticed the part that said not for aquarium use. They don't carry aquarium safe silicone at lowes or HD here. But if it's 100% silicone and doesn't have any added chemicals then why wouldn't any work?? any thoughts?
     
  2. Blackhawk Fan

    Blackhawk Fan I need a bigger tank!

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    I'm pretty sure you are ok as long as there's no mold stuff in it.

    I just read up on this myself and decided not to use the GE. I ended up buying the silicone that bulk reef supply sells. I was told that you can get aquarium silicone at petco as well.
     
  3. ficklefins

    ficklefins Super Duper Moderator CAMS Member

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    It isn't worth it. You are going to spend more than $10 for a fingernail frag of a coral, just spend the extra money and pick up an AGE silicone from your LFS. I purchased a silicone 6 years ago without any mold warnings and it ended up killing more than $100 worth of frags.

    This is one of those money saving moments that is not worth it. Spend the extra $5 for the AGE tube and forget the risk.
     
  4. droblack

    droblack Well-Known Member R2R Supporter

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    II has the mold inhibitors in it, I think. I is the way to go, the window one with no mold inhibitors.
     
  5. Troylee

    Troylee all about the diy!!!!! R2R Supporter R2R Excellence Award

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    Vegas baby!!!!
    Get 100% silicone product that is FDA approved without any additives.

    For example GE Silicone I is a safe brand, but Silicone II is not because of the additive. This is the one from Home Depot, not sure if Lowes carries it.

    DAP 100% silicone works well too, just make sure it is the one that is 100% silicone with no additives.
     
  6. killingseed2000

    killingseed2000 hobo of time R2R Supporter

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    yes , dont use the one with the mold inhibitors , i use GE silcone for windows and door and i make sure its the one that doesnt have the "mold inhibitors" i forget which one is which I or II , i just check the lable.
     
    Last edited: Aug 20, 2010
  7. Paul_N

    Paul_N MOD R2R Supporter

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    NOOOOO If you use II it will nuke your tank. I knew someone that used it and they had this clear slime all over the place. You must use I for GE.
     
  8. Mr E Wrasse

    Mr E Wrasse Well-Known Member R2R Supporter R2R Excellence Award

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    Great, I'm glad I just picked up siliconeI :) caulking now
    thanks guys!!
     
  9. TANKSALOT

    TANKSALOT Well-Known Member

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    Good.... i use II once and had to trough out the sand and the freshly made water and start all over..... "I" is OK
     
  10. Mr E Wrasse

    Mr E Wrasse Well-Known Member R2R Supporter R2R Excellence Award

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    all done, here's the finished product :) Now I'm just waiting for my LED's
    [​IMG]
    pardon all of the dirt, i still haven't cleaned the underside of the tank after i drilled it
     
  11. Fishinwall

    Fishinwall Well-Known Member

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    Silicone II

    Oh no I used silicone II. Which has mold inhibitor! Now what?
    I don't have any live stuff except for pods and worms in my live rock.
     
  12. Fishinwall

    Fishinwall Well-Known Member

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    I used it to build my skimmer stand!
     
  13. babyjess210

    babyjess210 Well-Known Member

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    I use it GE Silicone II all the time with no issues
     
  14. Fishinwall

    Fishinwall Well-Known Member

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    Gosh. Sure hope you are right. I've been so careful, trying to do everything right. Mad that did this.
     
    Last edited: Oct 4, 2014
  15. Wolffa83

    Wolffa83 New Member

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    Do NOT use silicone II

    I know this thread is a few years old but I just mistakenly used silicone II for aquarium decorations I made and want to make sure absolutely no one makes the same mistake I did! I first started noticing mass deaths in my baby tank (one day after putting decoration in) and the next day fish in my main tank started looking weak and were listless at the top of the tank. I thought maybe it was because of the rocks I used until I stumbled upon this page: Database Of Aquarium Safe Silicone (Add Your Aquarium Safe Product) - General Aquaria Discussion - AlbertaAquatica Silicone I is safe but the I has the mold additive as mentioned above. Please don't use this in your tank! My fish are covered in a white glue like substance and are slowly dying. I feel awful!
     
  16. Wolffa83

    Wolffa83 New Member

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    Ps- I even let the silicone cure fore one week before putting it in
     
  17. Wolffa83

    Wolffa83 New Member

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    Ps- I even let the silicone cure fore one week before putting it in
     
  18. vladandlilith

    vladandlilith Well-Known Member

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    NO! Only GE 1 silicon GE 2 does have a mold inhibitor in it.
     
  19. 427HISS

    427HISS Well-Known Member

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    Lowes has aquarium safe silicone. It's almost twice as expensive though. I'll check Dr. Fosters & Smith and Amazon for better pricing.

    DAP 2.8 oz. Silicone Aquarium Sealant-00688 - The Home Depot

    Ad-
    PRODUCT OVERVIEW Model # 00688 Internet # 100128841 Store SKU # 686064
    DAP 2.8 oz. Silicone Aquarium Sealant is ideal for constructing or repairing small aquariums. The 100% silicone-rubber formulation provides a waterproof seal that won't crack or shrink. It is non-toxic when cured.
    California residents: see Proposition 65 information
    100% silicone rubber is non-toxic when cured
    Can be used for patching tubes and hoses and attaching plastic or ceramic accessories
    Mold- and mildew resistant
    Flexible sealant won't crack or shrink
    Meets ASTM Specification C 920, Class 25, Type S, Grade NS
    --------------

    Petco has the small tube of aquarium sealent from All-Glass for $7.69

    Walmart has Loctite,(which I like their automotive products) but only says it's Ph safe for aquariums, nothing about mold additives. $5.50
     
    Last edited: Apr 21, 2015

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