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Re: foam glue?

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  • szczowicz
    ... case ... Mike I ve always understood that an adhesive bonds when the solvent has evaporated. Foam is non porous so it might still take a while for the
    Message 1 of 18 , Jan 1, 2004
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      > if you used one of the tubed foam-safe adhesives and
      > you have wide pieces of foam to bond, it can take weeks, literally, for
      > it to set up enough to cut and shape it without shifting. This is a
      case
      > where I can see Formica #160 working better by instantly bonding.

      Mike

      I've always understood that an adhesive bonds when the solvent has
      evaporated. Foam is non porous so it might still take a while for the
      water in the 160 to find its way out through the edges and allow a
      bond especially in the middle of a large sheet.
      I wonder whether the most successful adhesive for bonding large pieces
      of foam are those which rely on a chemical reaction rather than
      evaporation of the solvent.
      Mark
    • MJ
      The advantage I see with the water based [blue-gren] contact cement is that after coating both pieces to be bonded one lets the solvent evaporate before
      Message 2 of 18 , Jan 1, 2004
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        The advantage I see with the water based [blue-gren] contact cement
        is that after coating both pieces to be bonded one lets the solvent
        evaporate before bonding the two adhesive coated pieces with
        pressure. I believe this would be the best method for large pieces
        of foam. I don't know what "formica 160" is, are we talking about
        the same material? mike
      • Mike Lehman
        Mark, I think the big difference is how the solvent, whatever it is in the two products, evaporates. With the tube foam board adhesive, you get a much thicker
        Message 3 of 18 , Jan 1, 2004
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          Mark,
          I think the big difference is how the solvent, whatever it is in the two
          products, evaporates. With the tube foam board adhesive, you get a much
          thicker product that evaporates mostly after the pieces are joined. With
          the contact cement, most of the evaporation occurs before the pieces are
          joined. And once they are joined, it going to take much longer for the
          remaining solvent/moisture of tube adhesive to work its way out from
          between the sheets than it is for the rather limited remaining
          solvent/moisture from the contact type adhesive.
          Mike Lehman
          Urbana, IL

          Mike Lehman wrote:
          >>if you used one of the tubed foam-safe adhesives and
          >>you have wide pieces of foam to bond, it can take weeks, literally, for
          >>it to set up enough to cut and shape it without shifting. This is a
          >
          > case
          >
          >>where I can see Formica #160 working better by instantly bonding.
          >
          szczowicz wrote:
          > Mike
          >
          > I've always understood that an adhesive bonds when the solvent has
          > evaporated. Foam is non porous so it might still take a while for the
          > water in the 160 to find its way out through the edges and allow a
          > bond especially in the middle of a large sheet.
          > I wonder whether the most successful adhesive for bonding large pieces
          > of foam are those which rely on a chemical reaction rather than
          > evaporation of the solvent.
          > Mark
        • szczowicz
          Mike, I agree but one of the main considerations is that most of the specialist solvents anticipate gluing the sheets together end to end rather than one on
          Message 4 of 18 , Jan 1, 2004
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            Mike,
            I agree but one of the main considerations is that most of the
            specialist solvents anticipate gluing the sheets together end to end
            rather than one on top of the other - this is building material and
            not made for the RR modeller. But I'll be interested how you fare when
            you try your glue out. I have to say that using my 'glue for all
            seasons', latex, was still soft after many days - ie it failed. So i
            went back to my wire mesh and plaster favorite and will avoid foam for
            the time being - messy stuff anyway
            Best wishes,
            Mark
          • Mike Lehman
            Mike, Formica #160 is, indeed, a sort of blue-green (turquoise?) water-based contact cement. My guess is that we are talking about the same thing. Mike Lehman
            Message 5 of 18 , Jan 1, 2004
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              Mike,
              Formica #160 is, indeed, a sort of blue-green (turquoise?) water-based
              contact cement. My guess is that we are talking about the same thing.
              Mike Lehman
              Urbana, IL

              MJ wrote:

              > The advantage I see with the water based [blue-gren] contact cement
              > is that after coating both pieces to be bonded one lets the solvent
              > evaporate before bonding the two adhesive coated pieces with
              > pressure. I believe this would be the best method for large pieces
              > of foam. I don't know what "formica 160" is, are we talking about
              > the same material? mike
            • MJ
              Thanks Mike, products often have different names up here in Canukland. mike
              Message 6 of 18 , Jan 2, 2004
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                Thanks Mike,
                products often have different names up here in Canukland.
                mike

                > Mike,
                > Formica #160 is, indeed, a sort of blue-green (turquoise?)
                > water-based
                > contact cement. My guess is that we are talking about the same
                > thing.
                > Mike Lehman
              • Payne,Brett
                Mike, For liquidnails you can assume this applies to any Wash Up with Water contact adhesive. I know there are multiple brands. Also there are alternates
                Message 7 of 18 , Jan 4, 2004
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                  Mike,
                  For "liquidnails" you can assume this applies to any "Wash Up with Water" contact adhesive. I know there are multiple brands.

                  Also there are alternates available at the craft stores that are similar to white glues that are designed to glue dissimilar materials including foam. The one I use is called a tacky glue. I find this sort of glue a lot more user friendly than Liquidnails.

                  Brett Payne

                  -----Original Message-----
                  From: Larry Smith [mailto:wooddale@...]
                  Sent: Thursday, 1 January 2004 4:42 AM

                  Mike
                  Liquidnails makes a product that is used for gluing extruded foam. It
                  can also be used to glue the foam to wood. Out club has used it an it
                  works quite well.
                  Larry Smith

                  MJ wrote:
                  > What are you finding is the best glue for joining extruded
                  > styrofoam, i.e. blueboard, to itself or wood?
                  >
                  > mike
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