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Thread: 2 part foam and vertical surfaces

  1. #1
    Senior Member RCR's Avatar
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    2 part foam and vertical surfaces

    What is the best method for using 2-part foam on a vertical surface? I'd like to use this stuff, but I don't want to cover the floor with it.

    Bob
    Bob custom '84 Fiero SE --->>> custom F408
    http://www.madmechanics.com/forum/cu...ilepic37_1.gif

  2. #2
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    >>> need more details .. is this an enclosed vertical surface or open vertical surface ??
    are you trying to spray foam your walls to insulate them ?


  3. #3
    Senior Member MacGyver's Avatar
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    Bob,

    Iím assuming your trying to use foam to shape a vertical body panel

    In my experience, there really isnít a great way to do it without wasting a lot of foam. I generally just use pieces of cardboard to lightly direct the foam into the area I want without letting too much of it spill onto the floor. The more you disturb it while itís curing the more uneven the deniably will be. Which makes it hard to shape later on with sandpaper for an even surface.

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    Yes, you need to create a box of cardboard or thin, rigid plastic sheet to contain the foam when you mix and pour it. Really no other way to do it and get a consistent foam density that can be worked with.

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    Senior Member RCR's Avatar
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    Thanx guys. Kind of what I thought. From what I've read, multiple pours will be needed also.

    Is there a preferred not stick surface to use on the "box", or just cut it off?

    Carbuilder: it's the rear section of my 308 build, currently open, and pourable foam (not spray).

    Bob
    Bob custom '84 Fiero SE --->>> custom F408
    http://www.madmechanics.com/forum/cu...ilepic37_1.gif

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    If you use plastic sheet that is flexible enough to form whatever curves you need you can wax the surface of it and it will peel right off when the foam is set.

  7. #7
    Senior Member RCR's Avatar
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    Cool

    Packing tape seems to work very well, too.
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    Bob custom '84 Fiero SE --->>> custom F408
    http://www.madmechanics.com/forum/cu...ilepic37_1.gif

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    It's a pain in the butt to do pour-foam vertical. You may just want to make a cardboard form and pour it horizontally, then strip off the cardboard and cut to fit the space you want. Although I have found it to be insanely cheaper and easier to use the pink foam from Home Depot.
    My Scratch-built Countach LP400 build: http://projectcountach.blogspot.com/

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    Depending on how strong an expandable foam your using you can try this....
    use double sided tape to outline the outside of the area your going to foam then cover that area with a heavy thickness of plastic sheeting leaving it loose to allow for expansion to the depth of foam you want. Inject the foam and it should stick, expand and not fall all over your garage floor. Kind of a poor mans vacuum bagging.


  10. #10
    Senior Member RCR's Avatar
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    Quote Originally Posted by cr1978 View Post
    It's a pain in the butt to do pour-foam vertical. You may just want to make a cardboard form and pour it horizontally, then strip off the cardboard and cut to fit the space you want. Although I have found it to be insanely cheaper and easier to use the pink foam from Home Depot.
    It is a PITA, but I've had it with sheet foam and glue: RCR's body mods... - Pennock's Fiero Forum
    My local HD/Lowes/Menards no longer carries the brand I originally used and poly foam is out if I have to coat it before doing a layup.

    Carbuilder: I pondered doing it that way, but I think it's just as much setup as doing it with cardboard, and cardboard provides a little more "control" on the final shape.

    Bob
    Bob custom '84 Fiero SE --->>> custom F408
    http://www.madmechanics.com/forum/cu...ilepic37_1.gif

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