AQUARIUM SAFE Silicone, Glue, Cement and Adhesives.


Today, I want to talk about my favorite silicones glues cements and adhesives that I use in and around my aquariums and for my projects So the first thing we should talk about is silicones that is the number one question that I get about Aquarium adhesives is what type of silicone can I use and what type of silicones are safe? Well, that’s not necessarily an easy question to answer I can tell you what I use But depending on where you’re located in the world you might have zero access to these So let’s start out by telling you what I use in some recommendations And then we’ll follow it up by what you can look for in other types of silicones if you can’t find these the number one [silicone] that [I’ve] been using and I’ve been using for about ten years now is Ge silicone one window indoor it’s a hundred percent Silicone with no additives the other type of silicone that I use which is in here right [now] is ge Scs 1200 it’s Also a great silicone Now when I can’t get to a store that sells this or I can’t find it I go to my local home hardware and get weather shield Which specifically states that it’s safe for aquariums right on the packaging. I need to be clear here [I] find zero difference in whether I use this one or this one or [any] other types of silicone? [I] find they have the same strengths same consistencies, and they’re about the same prices [I] paid between five and eight dollars for a large Tube like this when I’m building aquariums this is the size that [I] use and For smaller tubes like these I’ll pay closer to three to five dollars usually I stock up on silicones when I see them go on Sale though the big Tubes I use with a caulking gun to build aquariums [and/or] some of the bigger jobs that I need to do Smaller Tubes, I like to use these for a lot of smaller jobs like installing baffles inside of a sump and or any other small little job I need obviously this is a lot easier to get in and [around] everything then a big caulking gun with this on the end So what if you can’t find the ones that I use well the number one thing [that] you want to look for is that it? says a hundred percent silicon then it has additives you want to look for if it says Mildew resistant or Mold inhibitors, or anything like that if it does stay away [from] it those are what are not safe for your aquarium? [if] you’ve ever used silicone before it comes out in a very thick substance typically taking about 10 minutes to start Curing and by that it only starts to cure on the on the outside of it And we call this skinning where it forms a cured skin on the outside The inside of the silicone will not be for a bead of silicone. That’s about six millimeters in diameter It’s going to take about 24 hours for that to cure for something bigger you typically need a little bit longer for [example] for big glass tanks I’ll wait three to seven days before I start a test [film] but for something as simple as a Small tank like a Thirty gallon and or if your [riesling] in your tank 24 hours is sufficient if you’re still not sure What aquarium silicone to use ask? join a local aquarium club join a local forum get on a Facebook group and ask around and find out if anybody in your area knows of an aquarium safe silicone, that’s commonly available to you So like I said if this doesn’t apply to you do your research and ask around locally okay on to cements I used to build Acrylic aquariums when it comes to working with acrylics or even Plastics for that matter my favorite product to use is well done now Well Dawn comes in a variety of different types including [weld-on] [4] which is water thin and [weld-on] 16 which is a more of a syrupy type of cement both doing pretty much the same thing the differences are pretty clear though well don 4 is meant to Bond acrylic on a molecular level it works by softening the Acrylic first and once both edges of the acrylic Soften within minutes the well Dodd 4 actually evaporates leaving behind a Welded Seam of acrylic that is bonded on a molecular level [well] Don 4 comes in a variety of sizes This is actually 473 millilitres. I paid about 15 bucks for it for example [a] hundred gallon. Tank will only take me [about] 20 20 to 30 milliliters of well Don [4] to build it so [as] you can imagine I could build a lot of aquariums with just this one pint when it comes to weld on 16 This is a little different. It’s still great for bonding acrylics, but it’s almost like silicone Whereas once you apply it. It actually remains. It doesn’t evaporate Being more syrupy in consistency it means that it can also fill in gaps and bond things that are not perfectly flat It also doesn’t cure nearly as fast you can still move things around for about the first five minutes But after ten minutes it becomes a more permanent fixture after 24 hours It’s fully cured a little thing like this will cost me about [eight] bucks which might sound expensive But it’s entirely worth it once you apply it to acrylic It’s definitely permanent now if you can’t find weld on for all you need is Methylene chloride Which is actually its main ingredient if you can’t find Methylene chloride Chloroform actually works as well both being water thin but cure a lot faster So while you have about one to two minutes to work with your acrylics with this you only have 10 to 20 seconds to work? With Chloroform or Methylene chloride? Okay, let’s move on to another cement This is hugely popular in the Hobby And it’s just simple Superglue or I like to call it [krazy] [glue] when it comes to using crazy glues This is for really small jobs Where you simply need a couple of small things to stick together quickly the gel type is what I use the most [this] is actually most Popular for attaching plants to things like rocks and or driftwood [any] super glue is fine because once it’s cured and since you’re using such A small amount it’s harmless now why use this instead of this well? Well done 16 is typically best for Acrylics and plastics Whereas [Superglue] will bond to more surfaces with that said this is also a bit cheaper being 5 bucks and far more and far more common to find a glue gun is Extremely useful in the aquarium Hobby especially for the do-it-Yourself hobbyist and When you need bigger jobs done and need something to cure quickly instead of waiting 24 hours like you would for silicone This will actually go on in the same consistency of silicone yet cure a lot Faster with that said it’s not really good to see leaks however. It is great to bond things together So if you’re building your own decorations [or] even doing some repairs a glue [gun] is perfect for it once cured It’s fine for underwater use as well Now you be thinking that a glue gun is expensive But I got this for ten bucks at Walmart [and] a bag full of the glue refills for about five bucks This is going to last me for months cure times for this is typically under 30 seconds the next thing I want to talk about is this new product called Bondic now I’m not sponsored, and I didn’t get any of this for free I bought it at my local hardware store in fact they only cost 15 bucks [apiece] I stocked up on them because over the last few days I’ve been using this for [a] lot of different things, and I’ve been completely impressed so far basically the way It works is it’s shaped like a little pen you take the top off and you squeeze the pen and out comes a little gel now that gel will never cure until You shine this ultraviolet light on it with about four seconds of shining the light on it It cures now. It cures to a consistency is much like The glue gun except it cures a slightly harder I found now could be used to bond things together. You [can] build up in layers. You can sand it and shape it You can use it to fill in things it can actually be used underwater And you can cure it underwater you can even paint it according to all this packaging. I’ve used it for a number of things already including using it in place of soldering Which this actually ended up working really well for that if you made it this far in the video You’re obviously into do-it-yourself aquarium projects Just as much as I am and if that’s the case I highly suggest picking up my book the ultimate do-it-yourself Handbook for the do-it-yourself aquarist. You can get your signed copy at the king of diy Com anyways Hope that you guys enjoyed today’s video. I certainly enjoy making them for you every Thursday I do a topic of the week just like this and on Sundays. I do a do-it-yourself aquarium project So if you didn’t enjoy today’s video join me next Sunday or next Thursday, and I’ll have something totally different

100 thoughts on “AQUARIUM SAFE Silicone, Glue, Cement and Adhesives.

  1. I’m reading mixed reviews about GE-1 100% silicone. I’m looking into starting to build my own tanks now, and want to be sure the GE-1 is safe. I also want to be sure I can build bigger tanks with it 100G and above without compromising strength.

  2. What would be the best option to cover the inside of a canoe for turning it into a pond? (I realize canoe is waterproof already, want to paint the inside a lighter color though).

  3. Thanks for the video I would have never guessed some of those things where safe to use. What is safe to use as a sealer on homemade aquarium decorations?

  4. My boyfriend is doing a PhD in medical research. He’s so used to watching your videos with me he’s just referred to this video to help him select aquarium silicon in his next experiment.

    He’s measuring the time it takes human skin cells to grow on different materials and join up with others on a different material and the silicon is going to hold it all together in the solution 🙂

    I thought you’d appreciate knowing that your old videos are still relevant and useful, even outwith the hobby 🙂

  5. Hi would like to ask as I am using epoxy to try to fix my cracked alcyric fish breeder case, and i saw your video after that. So i wonder would it be alright after 24 hours dry up, to put in shrimp or fishes thanks

  6. Sorry to resurrect but would you still recommend GE silicone one to rebuild a 72 gallon (48x20x18)? I’ve heard I should go to RTV but finding reliable info on whether it’s safe for my fish is another story. Too many brands.

  7. Anyone here use Epoxy for keeping rocks stuck together, such as lava rock? If so what kind of Epox should be looked for?

  8. The Blue GE tube Silicone 1 that you show – clearly states not for use below water line and aquariums – how has it fared in your – any thoughts on why its labeled not for aquariums

  9. Hey bro I used this GE and now all my fish are dead ,,,,, what can I do now , shall I wait or scrape it out , or what

  10. Which 1 of these glues are recommended to use on a Pumice (volcanic rock) that’s split in 2?
    A) Silicone
    B) Cement
    C) Crazy Glue
    D) Bondic
    E) I heard of this glue called Resin, but don’t think you mentioned it

  11. so i have a "floating rock" thats suction cups to the floor of my tank with fishing wire giving it that floating invisible look… but it unsuctions and floats to the top of my tank instead… so i have two rocks that sit on top of the suctioned area stopping it from doing that… if i glue gun the suction cup top and a little bit of the wire to the rocks do you think that would be strong enough to hold it down? or would i need a stronger glue/silicone ? HELP ME

  12. Can I use superglue for plants when the glue has multiple ingedrients? Like is really any fine? Because I've got some really cheap ones…

  13. I used the kind you said to use in my brackish tank let it cure a long time now I have noticed some type of whitish film coming off the seams is this normal

  14. I have a treasure chest decoration but the sparkles inside come off pretty easily. Is it okay to use hot glue to cover the sparkles?

  15. What type of paints are safe for a aquarium …. I am thinking of modifying a PVC pipe and give it a wooden log / drift wood look .
    Thank you.

  16. I need something to glue stones over my plant pots! Safe for plants! they told me it’s a spray! Do you know what it is? Thank you

  17. Hey Joey, the GE silicone 1 tube says 'not for underwater/aquarium use' on the tube. Can it be used externally for cracks and/or leaks? Please reply.

  18. ASK! HELP!!

    I am not building an aquarium I need a call that expand and contract in various temperatures and humidity. Any ideas

  19. Idk if I’m going to get a reply from anyone but I got pretty much the same silicone but it’s white is that still safe??

  20. Would you ever consider building an acrylic aquarium with a "weld-on 16 type more solid glue", if a more liquid weld-on 4 type glue was not available in your area?

  21. It's funny, if someone uses GE silcone 1 or any of the other products for "DIY" and the fish die, it's easy to say it's because of another problem like water chemistry. The freaking GE silcone 1 says "NOT FOR AQUARIUM USE".

  22. It’s crazy to think he used to be a fighting rough tough guy in trouble with the law and stuff. Inspiring turnaround

  23. Just picked up some GE Silicone 1 clear from Canadian Tire and it states on the instructions: "not for use below the waterline or in aquariums". Strange since everyone says this is great for sealing aquariums.

  24. Hello. We are new to fish keeping. Been many many years since I've kept any fish. We are keepers of a beautiful male betta since the first of the year basically. I've been dealing with trying to find the right cave for him. They're always a little sharp in areas. If I sand those areas down. Is there some type of sealer that I could coat the decoration with afterwards to make sure it's still safe to go in his tank?

  25. Im rebuilding a 100 gallon fish tank is it safe to use lexel sealant or should i tak it back and get silicone

  26. Thanks for this! What would you recommend to glue acrylic to glass? I have a glass tank but want to attach an acrylic rim around the inside to sit my DIY lid on top of it.

  27. Hey Joey – JB WaterWeld putty can be used with potable water, but what are your thoughts on Marine Weld 2 part? Have you worked with it before? I emailed JB and they said that MarineWeld is non-toxic when fully cured…. Do you think it's safe to use on a submerged project?

  28. I tried using the sealant you recommended on a 10 gallon and now after three years I've had no issues at fish dying and now they're dying. The sealant GE seems to be toxic to my fish and now need a new tank fast before they all die. That was a bad idea I think. All my water parameters are perfect and tank is cycled properly for a week.

  29. I dont know why i dont just go to your channel before i bother googling something. This is why you really are the King

  30. Can i use ge silicone 1 to seal a acrylic panel to glass panels? 3 of the panels are glass and one on the end is acrylic, none of it is sealed and i was hoping to try and make this into my next project tank if sealing acrylic to glass is possible

  31. Recommend any aquarium safe paint? Wanting to paint the pvc that I’m using to build a filtration system

  32. Any experience with fabric glues? Heard they are washable, curious if they will hold up submerged for a long time though, also whether they are safe?

    (Wilk only use for bonding plants, not really stones hehe)

  33. I'm in Toronto and you've mentioned you're from Canada. Where can I buy GE silicone I? Home depot only sells GE II.

  34. This is crazy…on the back of a tube of GE 1* All Purpose 100% Silicone it says “Not for underwater/aquarium use. Ten years sound like a lot of GOOD use. This is my first time to reseal a corner of my 55. What should I use, GE or Weather Shield? Thanks, I’m a worry wart (aka chicken’) because my wife will be pissed if it leaks!

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