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Home Tools & Equipment Casting Castaldo® Mold Rubber

Guide to mould rubbers:


Castaldo White Label®, the less expensive and firmer of our two grades, has a high concentration of pure natural gum rubber, which makes it resilient and pliable, qualities that the experienced mold-maker values in his efforts to produce high-quality molds in the shortest reasonable time.

Castaldo Gold Label® contains even more pure natural gum rubber, making it even softer and more pliable. Experienced mold-makers know that this compounds superior qualities can save them substantially on labour costs when used for difficult molds containing undercuts, where a stiffer mold would break delicate wax patterns or would make their production impossible altogether.
Castaldo® Now you can make high-volume, heat-cured production molds directly from CAD/CAM or rapid prototyping patterns quickly and without damage to the pattern from heat or pressure. Castaldo VLT vulcanizes at temperatures as low as 160°F (71°C). At this low temperature you can even make a mold from a wax pattern. And shrinkage is only 1.4%, because of the low curing temperature. Since it is silicone rubber, Castaldo VLT produces highly detailed wax injections with extremely smooth surfaces that require less finishing. Waxes are self-releasing and need no release agents, and molds are easy to pack and cut. Castaldo VLT is sold by the pound in 18" long x 3/8" thick strips. Two widths are available: 2 7/8" and 5 3/4". Curing time is as follows. 160°F (71°C) 90 minutes : 180°F (82°C) 45 minutes : 170°F (76°C) 60 minutes : 190°F (88°C) 30 minutes
  Code Price ex. GST  
  RUB2 $140.00
Strips measure 2 7/8" x 18" x 1/8". Gold Label: Softer and more flexible than White Label, Gold Label is ideal for fine, delicate pieces and filigree.
  CodeDescription Price ex. GST  
  RUBCAST25 lbs. Gold Label® $125.00
Castaldo Gelato Super High Strength Molding Rubber Castaldo Super High Strength Silicone Jewelry Molding Rubber is available in strips 3/8" x 2 7/8" x 18" ( 6 mm x 7.3 cm x 45.7 cm ). Packed in boxes containing 5 lbs. Molds self release! There is no need for messy mold release spray. Castaldo Super High Strength Silicone Jewelry Molding Rubber gives waxes a smooth, shiny finish that won’t stick to the mold. And shiny waxes mean less finishing! Mold packing is easy! All you have to do is spread and press it in with your fingers. Just like putty.
  CodeDescription Price ex. GST  
RUBCAST4Castaldo Gelato 7 Colour Assortment $145.00
No Shrink Pink©: No Shrink Pink is a vulcanizing rubber that produces wax castings of exactly the same size of your original model in approximately 90 minutes, depending on size. Strips measure 2 7/8" x 18" x 1/8".
  CodeDescription Price ex. GST  
  RUBCAST45 lbs. No Shrink Pink® $145.00
Economical way to buy mold rubber. Rolls measure 18" wide x 1/8" thick. The 5 lb. roll is 3 1/2' long and the 50 lb. Roll is 35' long. Lined with white cloth (White Label) or golden colored cloth (Gold Label) one side and blue plastic on the other side. Castaldo White Label®, the less expensive and firmer of our two grades, has a high concentration of pure natural gum rubber, which makes it resilient and pliable, qualities that the experienced mold-maker values in his efforts to produce high-quality molds in the shortest reasonable time. Castaldo Gold Label® contains even more pure natural gum rubber, making it even softer and more pliable. Experienced mold-makers know that this compounds superior qualities can save them substantially on labor costs when used for difficult molds containing undercuts, where a stiffer mold would break delicate wax patterns or would make their production impossible altogether.
  CodeDescription Price ex. GST  
  RUBCASTCastaldo Rubber Gold Label 5lb roll $140.00
  RUBCAST3Castaldo Rubber White Label 5lb roll $140.00
A safe, non-toxic two part silicone rubber-mix that is pliable. Cures in about 15 minutes at room temperature. The rubber must be pressed or clamped in order to provide good detail. Good tear resistance with minimal shrinkage. Castaldo Quick-Sil is a revolutionary new 0% shrinkage jewelry molding rubber material that makes tough, long-lasting production molds with a high-shine finish ALMOST INSTANTLY. No careful measuring No messy liquids No 12-24 hour wait for finished molds No vulcanizer needed No release sprays needed -- its self lubricating Can be used for direct casting of pewter & other low-temperature metals! Quick-Sil molds are not weak, delicate prototype molds that can be used only once or twice. They will last for hundreds of uses and dozens of years.
  CodeDescription Price ex. GST  
  RUBCAST6Castaldo Quick Sil RTV 1 kg Kit $168.00
Castaldo LiquaFastICE RTV Silicone Jewelry Molding Rubber No Heat - No Pressure - No Shrinkage - No Waiting! New LiquaFast ICE from CASTALDO is a transparent two-part 0% shrinkage RTV silicone molding rubber that cures very rapidly at normal room temperatures and cures even faster at slightly warmer temperatures. That means that you can make a mold from your CAD CAM, RP and SLA models in the morning, shoot waxes 30 minutes later and cast them that afternoon. No more waiting. New LiquaFast ICE makes strong, tough, tear-resistant permanent molds that last and last and do not become soft with age. Normal cure time is only 60 - 90 minutes. Faster cure is possible at only 50 degrees C. LiquaFast ICE is economical, costing far less than traditional silicone RTV materials.
  Code Price ex. GST  
  RUBCAST7 $150.00
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