Plastic filler

Discussion in 'The Projects Forum' started by frenchie29, Jan 3, 2009.

  1. frenchie29

    Thread Starter Active Member

    Nov 28, 2008
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    What could be use to fill holes? Something like silicone but gets hard and uniform after curing?? I'm doing a few projects and I need to fill some holes I tried silicone but it still too soft after drying out, JB Weld gives a nice finish but doesn't stick on plastic or rubber. Is there such product out there?
     
  2. floomdoggle

    Senior Member

    Sep 1, 2008
    217
    2
    Hey Frenchie,
    Please explain what holes you are trying to fill, then maybe a response would be in order. What is the material?
    Dan
     
  3. frenchie29

    Thread Starter Active Member

    Nov 28, 2008
    134
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    Here's one
    http://caseyconnor.org/phantastic.html

    http://caseyconnor.org/phantastic.html

    I built one of those tonight and tried to make it as small as possible so I shaved the top of the rubber plug and now the 2 LED are just "floating" there I used silicone before but it's very messy and doesn't hardened. It has to be solid and sealed I am using those at work every single day at work
     
  4. Søren

    Senior Member

    Sep 2, 2006
    472
    28
    Hi,

    Use Araldite - preferably the slow hardening type (bake at around 60°C if you are in a hurry and/or want a very hard surface).
     
  5. frenchie29

    Thread Starter Active Member

    Nov 28, 2008
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    is it just a regular epoxy glue? I could only find adhesive and glue from them
     
  6. frenchie29

    Thread Starter Active Member

    Nov 28, 2008
    134
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  7. Søren

    Senior Member

    Sep 2, 2006
    472
    28
    Hi,

    Yes, If you can't find it locally, here is a couple of links...

    Blue Araldite http://www.dealextreme.com/details.dx/sku.5376

    Red Araldite (5 minutes hardening time) which need a quick hand http://www.dealextreme.com/details.dx/sku.5390

    Both are $4.71 incl. shipping.


    The blue (slow) type hardens up harder than the red type, but since you don't have to lift a car, hardening speed is the main factor.
    Blue is easier to work with for that reason.
     
  8. SgtWookie

    Expert

    Jul 17, 2007
    22,182
    1,728
    I've used Seal-All in a number of applications with reasonable results.
    http://www.eclecticproducts.com/sealall.htm
    It's commonly available at automotive supply stores in the US.

    One plus for your application is that it is clear, so even if you glop it over the LEDs, you'll still be able to see them. It isn't an epoxy, so there is no mixing. The surface will air-dry to the touch in a few minutes, but if you're trying to fill a cylinder with it, a full cure will take a long time.
     
  9. jpanhalt

    AAC Fanatic!

    Jan 18, 2008
    5,689
    901
    Not quite sure what you are trying to glue to what. Goop and E6000 (which are basically the same thing according to the manufacturer Eclectic and are probably the same or very similar to SgtWookie's suggested Seal-All) have good adhesion to a variety of plastics, dry by solvent evaporation, get quite strong, but remain flexible. They dry harder than silicone, but not as hard as most epoxies.

    PU casting is probably a bad choice, if you want good peel strength.

    If you are trying to fill holes you made in the plastic box, I would start with finding out what type of plastic it is.

    Alternatively, an extra hole or two may not look as bad as a botched up attempt to fix them. If it is a mounting hole that is too big, then I would consider masking a thin collar (like a fender washer) on both sides. Thin sheet plywood (e.g., 1/32" at model stores) works well.

    John
     
  10. frenchie29

    Thread Starter Active Member

    Nov 28, 2008
    134
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  11. frenchie29

    Thread Starter Active Member

    Nov 28, 2008
    134
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    That stuff is amazing i'm hooked on it now I am ordering silicone molding so I can make my own project boxes and other stuff the end result is identical as the ones you buy and is very easy to machine. Pretty good stuff I'm gonna buy it by the gallon when I am done with the kit I have :D
     
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