Hardscape adhesive - The Planted Tank Forum
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post #1 of 11 (permalink) Old 08-23-2019, 02:53 PM Thread Starter
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Hardscape adhesive

I want to permanently attach some wood and rock together in one large structure.

Does that aquarium epoxy putty work well or should I use aquarium silicone?

The superglue I use for other applications isn't permanent and neither is 5 minute epoxy.


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post #2 of 11 (permalink) Old 08-23-2019, 03:22 PM
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Check out the super glue and cigarette filter method:


I recently used it to put together hardscape.

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post #3 of 11 (permalink) Old 08-23-2019, 07:16 PM Thread Starter
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Originally Posted by AcidGambit View Post
Check out the super glue and cigarette filter method:



https://www.youtube.com/watch?v=GBv_gsFRS3A



I recently used it to put together hardscape.


I've looked into this method before a bit.... How long have you had it in your tank? Superglue hasn't proved to be very permanent in my tank... Maybe a month or two before it falls apart. I need something permanent or else the wood will start floating


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post #4 of 11 (permalink) Old 08-23-2019, 07:23 PM
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Have a look at Max1 German super glue

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post #5 of 11 (permalink) Old 08-23-2019, 09:02 PM
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I do not favor any glues if the wood is large and still tends to float. One big problem is that wood tends to change as it fully soaks and part of that change is the surface getting softer, which can lead to the glue only holding the surface and letting the rest go shooting to the top to tear out covers, lights, etc.
If it's large and any chance of floating, I screw it solidly. Plastic ties are also an easy out if we drill the rock.
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post #6 of 11 (permalink) Old 08-23-2019, 09:22 PM
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My preference for rock-based structures: reef epoxy.

Silicone also helps.

For wood? All of the above. But also zip ties, fishing line, slate tiles, screws. Sometimes everything.


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post #7 of 11 (permalink) Old 08-23-2019, 10:52 PM
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Quote:
Originally Posted by jaz419 View Post
I've looked into this method before a bit.... How long have you had it in your tank? Superglue hasn't proved to be very permanent in my tank... Maybe a month or two before it falls apart. I need something permanent or else the wood will start floating


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I have no experience using it long term, but a lot of prominent aquascapers use it. In addition, superglue by itself may not be as good because you need the surfaces to mate up well. The cigarette filters help with that task, but conforming between the two surfaces that you are gluing.

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post #8 of 11 (permalink) Old 08-24-2019, 03:46 PM Thread Starter
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I do not favor any glues if the wood is large and still tends to float. One big problem is that wood tends to change as it fully soaks and part of that change is the surface getting softer, which can lead to the glue only holding the surface and letting the rest go shooting to the top to tear out covers, lights, etc.

If it's large and any chance of floating, I screw it solidly. Plastic ties are also an easy out if we drill the rock.


Yeah maybe I'll go this route. Screw all the wood together in a way that I can just set rocks in and around it to keep the whole thing down


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post #9 of 11 (permalink) Old 08-24-2019, 08:09 PM
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You can get a disposable food tub, cut off about 1 tall, put some river stone/gravel in it, do your arrangement and then use that clear water acrylic cast they sell at hobby shops. Stones/gravel make ballast to hold it down and rock and wood are cast into base. You can sprinkle top before it dries with actual gravel used in aquarium so it blends in. But once done its there permanently.

Think this, just with your aquarium decor and plastic tray at bottom, will take about a week cure.
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post #10 of 11 (permalink) Old 08-24-2019, 10:00 PM
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I used silicone to keep my driftwood from floating and it's working really well so far. I picked a few unobtrusive places to squeeze silicone between the rocks and driftwood. Then I sprinkled fine sand that matches the hardscape over the silicone bead. The effect is really nice - it's hard to tell where the silicone is unless you know where to look. This was with relatively thin branches, so I don't know how it would work with a really large piece of driftwood.

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post #11 of 11 (permalink) Old 08-25-2019, 03:32 PM
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Quote:
Originally Posted by PlantedRich View Post
I do not favor any glues if the wood is large and still tends to float. One big problem is that wood tends to change as it fully soaks and part of that change is the surface getting softer, which can lead to the glue only holding the surface and letting the rest go shooting to the top to tear out covers, lights, etc.
If it's large and any chance of floating, I screw it solidly. Plastic ties are also an easy out if we drill the rock.
I will eco this.
Sometimes the best option for large pieces is to use a 'dove tail' or 'plug' or otherwise in combination with glue method. Zip ties for security and a bit of moss of the top and you will never know.

I will also add- I have used Zoo-grade materials. But they dont adhere to much other than itself. I have a tank journal where I did 'coral' in a freshwater tank. But it was a hassle.

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