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      HomeMold-makingCasting Compound

      Casting Compound

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      20 article   /   51 Variants
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      • Alpa Sil EH 10:1
        addition-crosslinked precison silicone rubber mould material, medium soft (26 - 28 Sh-A), highly elastic, good mechanical stability, low viscosity (pours well), cures to an opaque light blue colour, mixing ratio of...
        4 Variants
        Alpa Sil EH 10:1
        from 10,50 €
      • Alginat universal moulding material
        quick-setting powered casting material, made from algae extracts, little mechanical stability, high viscosity (does not pour), odorless, cures to an opaque brown colour, mixing ratio of powder to water is 1:2,...
        2 Variants
        Alginat universal moulding material
        from 8,80 €
      • Latex Moulding Material
        natural rubber-based air drying single component casting material (dispersion), pre-vulcanized with ammonia (0.3%), very soft (no Sh-A data available), extremely elastic, very low viscosity, cures to a translucent...
        3 Variants
        Latex Moulding Material
        from 9,20 €
      • Latex paste
        natural rubber based air drying single component casting material (dispersion), pre-vulcanized with ammonia, medium hard, very elastic, very high viscosity (can be brushed and troweled), cures to a opaque amber...
        2 Variants
        Latex paste
        from 14,60 €
      • Köraform K 31 100:2 moulding material
        condensation-crosslinked silicone rubber moulding material, medium soft (ca. 23 Sh-A), highly elastic, very high degree of mechanical rigidity, low-viscosity (pourable), white and opaque when cured; mixing ratio of...
        2 Variants
        Köraform K 31 100:2 moulding material
        from 10,50 €
      • Gedeo latex
        air-curing, one-component, natural rubber based moulding material, pasty consistency, extremely elastic, applied in 4 layers, drying time is 6 hours
         
        Gedeo latex
        from 19,00 €
      • Alpa Sil V 66 1:1
        addition-crosslinked precison casting silicone, medium hard (25 Sh-A), highly elastic, good mechanical stability, very high viscosity (can be brushed and troweled), cures to an opaque green colour, mixing ratio of...
        2 Variants
        Alpa Sil V 66 1:1
        from 33,00 €
      • Alpa Megaplast 1:1
        addition-crosslinked precison casting silicone, medium hard (approx. 35 Sh-A), elastic, relatively little mechanical stability, very high viscosity (pasty, kneadable), cures to an opaque skin colour, mixing ratio of...
        2 Variants
        Alpa Megaplast 1:1
        from 16,90 €
      • Protosil RTV 245 silicone
        addition-crosslinked precision silicone for moulds, medium hard (app. 42 Sh-A), highly elastic, very high degree of stability, high viscosity (limited pourability), when cured the material is transparent, mixing...
        4 Variants
        Protosil RTV 245 silicone
        from 11,90 €
      • Gedeo Siligum moulding paste
        quick setting two-component silicone moulding paste for making casting moulds for small and flat objects using plaster, casting resin, wax, etc., very pasty consistency (kneadable), light blue appearance, mixing ratio...
        2 Variants
        Gedeo Siligum moulding paste
        from 14,00 €
      • Neukasil RTV 22 F
        Shore hardness
        soft, ca. 22 Sh-A
        Colour
        opaque beige-red when hardened
        Mixing rati ...
        1:1
        Pot life
        ca. 5 minutes
        4 Variants
        Neukasil RTV 22 F
        from 52,80 €
      • Silicone oil V50
        polydimethyl siloxane, low viscosity (50 mPa), colourless, density is 0.95 g/cm³
         
        Silicone oil V50
        from 9,90 €
      • Köraform A 50 T 10:1
        addition-crosslinked precison casting silicone that is temperature-resistant (short term up to 250 °C), medium hard (approx. 43 Sh-A), highly elastic, good mechanical stability, low viscosity (pours well), cures to...
        2 Variants
        Köraform A 50 T 10:1
        from 14,90 €
      • Talcum powder
        white
         
        Talcum powder
        from 2,20 €
      • Moulding set
         
        Moulding set
        from 30,50 €
      • Neukasil RTV 29
        addition-crosslinked precision silicone for moulds, very soft (app. 30 Sh-00), highly elastic, high mechanical stability, very low viscosity (good pourability), when cured the material is opaque white, mixing ratio...
        4 Variants
        Neukasil RTV 29
        from 11,90 €
      • Dyes for silicone
        highly concentrated pigment paste for colouring silicone casting material, non-poisonous
        7 Variants
        Dyes for silicone
        from 18,50 €
      • Alpa Tix A
        thixotropic agent for addition-crosslinked RTV-2 silicone (yellowish liquid), dosage is 0.2% of the whole amount, density at 23 °C is 1.03 g/cm³, viscosity is approx. 1.500 mPa, shelf life with proper storage is at...
         
        Alpa Tix A
        from 22,20 €
      • Alpa Tix C
        thixotropic agent for condensation-crosslinked RTV-2 silicone (yellow-orange liquid), dosage is 2 % of the whole amount, density at 23 °C is 1.04 g/cm³, viscosity is approx. 150 mPa, shelf life with proper storage...
         
        Alpa Tix C
        from 21,80 €
      • Gedeo Modellierset
        various set for casting and moulding projects
        5 Variants
        Gedeo Modellierset
        from 21,90 €
      Page 1 of 1
      Information about Casting Compound

      In order to reproduce objects – for example, sculptures, models, surface textures or body parts – a mould must be made from the so-called “master pattern”. Elastic materials are the most suitable for making these moulds. We have assembled a list of them under the heading “Moulding materials” which can be found under the category “Modelling, Moulding, Casting”. They are:

      • RTV 2 mould silicone rubber
      • elastic polyurethane resin
      • Latex milk
      • Alginate

      The following tables can provide you with an overview of the advantages and disadvantages of the various moulding materials.

       

      Comparison of elastic moulding materials


      Attributes Comp./Treatment

      RTV 2 mould silicone

      Elastic PUR resin

      Latex milk

      Alginate
      Number of components two two one one + water
      Time and effort required very little very little very much very very little
      Linear shrinkage very little very little very much very very little4)
      Curing
      • reaction of 2 components
      • no heat produced
      • reaction of 2 components
      • heat produced
      • through drying

      • through “gelling”

      Risk of inhibition yes no no no
      Shelf life of the components (minimum) 6 to 12 months 12 months 24 months no information
      Toxicological/hazard info as a rule, hazardous label NOT required2) as a rule, hazardous label required
      hazardous label NOT required

      hazardous label NOT required
      Price high medium low low
      Attributes when cured        
      self-releasing yes no no no
      Time before first use of the mould 1 day to 1 week approx. 4 days approx. 3 days approx. 20 minutes
      Heat resistance high as a rule low low very low
      UV resistance conditional low no no
      Service life of the mould medium to long1) long short very short

      Comments
             
      Special features
      • can also be used as casting material


      • PUR components are sensitive to moisture
      • can also be used as casting material

      • smells like ammonia



      • mould must be kept wet
      • only good for a few pourings
      Intended uses flexible and block moulds for all pouring materials flexible and block moulds for all pouring materials flexible moulds for non-aggressive pouring materials body casts without extensive quality demands

      All the information refers primarily to the materials on offer at Modulor.
      1) depending on the type of crosslink
      2) Some hardeners require a hazardous label
      3) at room temperature (annealing possible if applicable)
      4) As long as pouring takes place within 20 minutes of making the mould

       

      The listed materials can of course be used for other purposes – for example, silicone is used to make temperature resistant seals, elastic polyurethane to make foams and latex to make examination gloves.

      Then again, hard, elastic materials like plaster are often used to make casts of objects. As a rule, very intricate moulds must be made for this work (see also the entry “Undercuts” in the “Small Lexicon” in the chapter “Silicone”).

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