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Mounting acrylic to brick wall options

Discussion in 'Installation Equipment & Techniques' started by K Chez, Sep 4, 2018.

  1. K Chez

    K Chez Member

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    I have a project where I need to mount a routed shape (in this case a paw print about 15" x 14") to a brick wall. The obvious choice is to drill into the brick but was wondering if there is an adhesive solution that would be durable long term.
     
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  2. SoCal

    SoCal Member

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    Sign Grade Silicone? I think drilling into it and using stand-offs would look the absolute best, however.
     
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  3. Billct2

    Billct2 Major Contributor

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    Yes, stand offs is nice, but mounting tape combined with adhesive would work.
     
  4. Moze

    Moze Very Active Member

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    You mention acrylic and that it's 15"x14" but you don't mention how thick it is - that's going to influence what you use.

    Stud-mounting would be the best option.

    If they don't want a lot of penetrations, drill and tap for one stud at the top and use tape and Lexel on the rest.

    Not sure what 'sign grade silicone' is, but silicone doesn't adhere well to bare acrylic. Spend the few extra bucks for Lexel (available at Lowe's).
     
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  5. bannertime

    bannertime "You guys do banners, right?"

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    I was going to assume they meant GE Silicone II because I've never seen a tube of silicone say anything about signs. I just Googled for the heck of it, and there is a "sign supply" that sells their own branded silicone. o_O
     
  6. rossmosh

    rossmosh Active Member

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    [​IMG]
     
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  7. visual800

    visual800 Very Active Member

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    is this interior or exterior? what thickness of acrylic?
     
  8. Robbie Moore

    Robbie Moore New Member

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    2 sided vhb tape and globs of silicone.
     
  9. ams

    ams Very Active Member

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    Don't use silicone or VHB tape for brick. You need to do stand offs.
     
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  10. Robbie Moore

    Robbie Moore New Member

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    BS stand offs are for decoration to hide hardware. If they want a cheap install without screws in brick this the best solution.
     
  11. Moze

    Moze Very Active Member

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    I wish people would stop recommending silicone for acrylic. It's adhesion to bare acrylic is nothing to write home about.
     
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  12. ams

    ams Very Active Member

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    It'll fail
     
  13. DerbyCitySignGuy

    DerbyCitySignGuy Very Active Member

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    No, it won't. The right adhesive plus VHB will work just fine and last for years. Moze is right about silicone, but even silicone will work for interior installations.

    Lexel, PowerGrab, Gripfill, and most other construction adhesives will work just fine as long as they're rated for plastics and concrete.
     
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  14. ams

    ams Very Active Member

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    You think Acrylic is going to sit perfectly flat on this brick?

    R10961_image1.jpg
     
  15. DerbyCitySignGuy

    DerbyCitySignGuy Very Active Member

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    Is that the only type of brick wall that exists?

    You don't own a level?

    [Edit: I'd bet dollars to donuts it's going on a flat brick wall, probably in a school or university.]

    [Edit 2: Will stand offs look better? Yes. Is it the only solution, or even the most cost effective solution? No.]
     
  16. ams

    ams Very Active Member

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    I am just suggesting not to do it that way, if they want to and it falls off later that's on them. I would rather turn down the job than to do that.
     
  17. DerbyCitySignGuy

    DerbyCitySignGuy Very Active Member

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    That's your prerogative, but if you honestly think that construction adhesive and VHB won't hold a tiny piece of acrylic to a brick wall, I'm not sure what to you tell you.
     
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  18. Gino

    Gino Premium Subscriber

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    There is/are no replacements for physical fasteners........ hidden, stand-off or whatever. Any adhesive or double sided tape can come loose for any number of reasons. Other than a hurricane or earthquake, the physical fasteners have a far better chance of not having something land on some unsuspecting pedestrian.

    The question isn't whether something will hold OR not, but if it doesn't, the consequences you'll pay for not making sure no one is ever hurt from YOUR installation.
     
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  19. SoCal

    SoCal Member

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    Signmart here in Southern California sells "HIGH PERFORMANCE SILICONE FOR THE SIGN INDUSTRY" and we have never had a problem with it adhering to acrylic.
    I would still try to convince my customer against it though since it is being mounted onto bricks.
     

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  20. Moze

    Moze Very Active Member

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    I'm curious what additive that has that makes it adhere to plastics/acrylic. Your typical neutral-cure or acid (acetoxy)-cure silicones on smooth, unfinished acrylic can usually be peeled off pretty easily. It doesn't mean a sign installed with it will fall down, but it doesn't guarantee that it won't. If his sign is 1/2" thick, there's no way I'd trust silicone. I'd even be leery if it was 1/4". Lexel welds/etches itself into acrylic and is well worth the peace of mind.
     
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