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Thread: Solvent adhesives... why don't more people use them?

  1. #21
    Raw Wave EsKALad's Avatar
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    I was wondering would the abs plastic from radio install kits would work good. What do you all think? And can this be sanded down like bondo?

  2. #22
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    I was going to use glass reinforced bondo to fuse my bezels, but I found a place that sells bulk abs regrind today and will be picking up a bunch after work to try this method instead, since I live in arizona and summer is coming.

  3. #23
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    Ok this is good stuff. I've got a can of acetone in my garage already, so I just have to look for plastic stuff around the house to melt. Ought to be easy for a pack rat like me to find something lol

    the dust from bondoglass is about the nastiest stuff around. itchy and it Fs my sinuses up even with a dust mask. I'll be glad to never touch the stuff again if I can.

  4. #24
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    I went out at lunch to home depot and found this product:



    it contains MEK, acetone, and some ABS resin already. Plus it was about 6 bucks for 32 oz. I should be able to just thicken this a bit with some more abs and go to town

  5. #25
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    link doesn't seem to be working right. whats it called?

  6. #26
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    man - just my luck with pics today - it's oatey black abs cement - I found it in the plumbing section at home depot.

  7. #27
    Jesus Freak antimatter's Avatar
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    Hey Coach...

    Can you elaborate on the mixing process a little further. I am trying to pin down actual quantities.

    I know it depends on how thick or thin you want your mixture to be but can you give us some guidlines.

    Do you start with the acetone and then add the shavings or visa versa?

    I guess those pictures would be very helpful here.

    BTW this is a great idea. My friggen bondo (not the one with fiberglass hairs) is cracking. It cracked on one side and i fixed that side with the BondGlass and now the other side cracked. Arggg
    -Jesus- King of Kings Lord of Lords

  8. #28
    Low Bitrate
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    I'll share a couple other ideas.
    Liquid plexiglas is a liquid acrylic that you can pour and sets up clear, plus it doesn't need any strengthening material like the fiberglass mat. The reason we use fiberglass with epoxy is that the resin doesn't cure stable, it cracks very easy and only has strength in thick blocks.
    Also, MEK methyl ethyl ketone is polyester resin hardener. You can find it at any marine supply shop, along with fiberglass stores and plastic depot, like TAP plastics.
    They will also have acrylic sheets and acrylic bonding solvents at TAP, and most of the pourable plastics.

    The main reason people use fiberglass and bondo is because they don't pour, they spread. It's very difficult to make a reverse mold that you can FILL with an acrylic or ABS formula where it will come out smooth. It's much easier to sand bondo. That said, you can come up with some cool results using the acrylics.
    I've used all of these methods extensively, and if anyone needs help with them, please ask.

  9. #29
    Constant Bitrate coachreed's Avatar
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    Mixing process elaboration... hmmm... lemme see just how specific I can get...

    Get your handy-dandy condiment bottle from Walley-World and fill it up loosely with ABS shavings (lets stick with shavings because they are ideal as opposed to chunks)... pour a small amount (maybe a tablespoon or so) of solvent into the bottle... better to start off with a little and add as you go... much easier to thin it out than it is to thicken it up... you will see that your shavings don't go very far as you add the solvent... cap your bottle off and shake. Now you will probably have about 1/4 of a bottle of sludge... add more shavings and shake it up... you want a nice smooth, pudding consitency (for lack of better description). As I said, if you put too much solvent into the bottle, you may have a hard time adding enough ABS to thicken it up... if you want to test the consitency, just try squirting a little out of the bottle onto a paper towel or piece of scrap cardboard or the such.

    Keep in mind also, if the mixture is thicker (less solvent), it isn't going to penetrate the plastic of the parts you are glueing together... at the same time, if the mixture is too thin (too much solvent), it will just seep through any crack or hole it can find and you'll have a big mess on your hands. I have found that once you have your parts set together, use masking tape to mask off the back side of your project to close off any holes that might let the glue ooze through.

    I'll post pictures in a few minutes... brb...
    Coach... aka Randy! (I often forget who I really am!) ;)

    ***Too many pieces and parts to list... maybe someday I'll show'm to ya!***

  10. #30
    Constant Bitrate coachreed's Avatar
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    Here are a few pictures... again, sorry I didn't take pictures as I was doing this... its a real biotch when you can't find the digital camera! BTW, I noticed that I actually paid 25 for the condiment bottles during a seasonal closeout at Walmart... I bought a few sets... anyway... you can see in the picture entitled "back", that on the left side there is a glob of plastic... that is what happens when you don't mask things off and squeeze a thin mixture onto the project... I didn't realize it was that bad until a minut ago... the good news is that I can just grind it back off quickly and easily... and when I'm done, I won't be itching... try that with fiberglass! lol

    Later!

    Coach!
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