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Casting or Moulding Rubber

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Casting or Moulding Rubber

Home › Forums › General Questions › Casting or Moulding Rubber

Viewing 6 posts - 1 through 6 (of 6 total)
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  • 20 January 2022 at 07:59 #28536
    James A
    Participant
      @jamesalford67616
      20 January 2022 at 07:59 #581318
      James A
      Participant
        @jamesalford67616

        A slightly unusual question, perhaps, but has anyone any experience using casting or moulding rubber? I wish to try making some rubber mats for an old car; the type that mould over and around the transmission tunnel. I have been looking for a suitable product to use and am considering Devcon Flexane 80. However, it would be good to hear from anyone who used this, or a suitable alternative product, before spending £80.00.

        Regards,

        James.

        20 January 2022 at 08:56 #581321
        Ramon Wilson
        Participant
          @ramonwilson3

          I haven't used it in such a manner so this is just a suggestion but there are many silicone moulding rubbers available in varying degrees of flexibility that would probably give you what you want. Pigments are also available to colour it – to the degree you want – without affecting its properties.

          An eBay search would probably help but the name Alec Taranti as a supplier springs to mind.

          It's been a long time since using it for mould making but it will certainly flow and set to minimal thickness for what you describe

          Hope that's of help

          Tug

          20 January 2022 at 09:03 #581323
          Speedy Builder5
          Participant
            @speedybuilder5

            I have made a mold of a 14" high garden cherubim. I used 3 coats of silicone molding rubber and then a a backing cold of re-inforced plaster of Paris (in sections). The silicone is not rigid enough to support the Devcon or other product on its own as the silicone mold is probably only 3/16" thick or so.

            Bob

            20 January 2022 at 09:45 #581326
            James A
            Participant
              @jamesalford67616

              Thank you for the suggestions. The idea of using plaster of Paris to support the mould is a good one one of which I had not thought.

              I had not considered using silicone for the actual mats as the only silicone I have encountered it is too fragile to stand up to that type of use. However, I shall look at the suggested supplier to see whether there is a more robust style that would be appropriate.

              Thank you.

              James

              20 January 2022 at 10:09 #581331
              Russell Eberhardt
              Participant
                @russelleberhardt48058

                I would stick to polyurethane rather than silicone. Polyurethane looks and feels more like real rubber and is stronger. The disadvantage is that it will stick to anything and needs a good release agent on the mould.

                Russell

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