Item Price Qty
3340-A
Quart Kit - 40 Shore A
$79.95
3340-B
Gallon Kit - 40 Shore A
$199.95
Quantity Discounts
4+ $ 189.95  
3360-A
Quart Kit - 60 Shore A
$79.95
3360-B
Gallon Kit - 60 Shore A
$199.95
Quantity Discounts
4+ $ 189.95  
2333-A
Plastic Paint Stirrers for Urethanes
$0.95
Urethane Casting Resin - Shore A

Create Flexible, Tear-Resistant Parts and Molds

Pour tough, flexible parts and molds with Urethane Casting Resin Shore A. Available in two hardness variations, 40 Shore A and 60 Shore A. These urethane casting resins make it easy to create softer more resilient parts and tooling. These urethane casting resins have been designed specifically for the pouring of prototype and production parts. They can also be used to create fast flexible molds with good life. They offer some undercut or negative draft. While silicone can be used to create more flexible and lower cost molds, Urethane offers superior tear strength and offer 3-4 times the mold life. Shore A resins can accept pigments to achieve opaque colors in finished castings. These Urethanes are used in many common mainstream products, but are especially popular in automotive applications.

When mixed thoroughly, pour the urethane slowly to aid the release of any air bubbles. When using Urethane Casting Resin Shore A kits, avoid water and all types of moisture contamination. Do not use any urethane kit with PVA Release Film, and do not mix with wooden mixing sticks. #2333 Plastic Paint Stirrers for Urethanes are recommended. To ensure a proper release from a mold, use at least four layers of #4121 Non-Silicone High Temp Paste Wax.

Urethane Casting Resins with Shore A hardness can completely cure at room temperature, but can also be heat cured up to 150°F for faster production rates.

    #3340 Urethane Casting Resin 40 Shore A

  • Mix Ratio (by weight) – 100:75
  • Color – Light Amber
  • Working Time, 4 fl. Oz. mass @ 77°F – 25 minutes
  • Demold Time

    (75°F) – 2.5 - 3 hrs

    (150°F Cure) – 30-40 minutes

    #3360 Urethane Casting Resin 60 Shore A

  • Mix Ratio (by weight) – 100:55
  • Color – Light Amber
  • Working Time, 4 fl. Oz. mass @ 77°F – 15 minutes
  • Demold Time

    (75°F) – 2 – 2.5 hrs

    (150°F Cure) – 30-40 minutes

Quart kits (#3340-A, #3360-A) will typically ship in a small box. Where possible, we will combine ordered items to reduce the number of boxes shipped.

Gallon (#3340-B, #3360-B) kits will typically ship in a medium or large boxes.
Urethane Casting Resin - Shore A

40 Shore A resin is available as a two-part kit, meaning it is one product made up of two containers. It is available in a variety of sizes that include:
One quart kit, 40 Shore A (#3340-A); Part A comes in a quart container, Part B in a pint container.
One gallon kit, 40 Shore A (#3340-B); Part A comes in gallon container, Part B in a smaller than gallon-sized container.

60 Shore A resin is available as a two-part kit, meaning it is one product made up of two containers. It is available in a variety of sizes that include:
One quart kit, 60 Shore A (#3360-A); Part A comes in a quart container, Part B in a pint container.
One gallon kit, 60 Shore A (#3360-B); Part A comes in gallon container, Part B in a smaller than gallon-sized container.

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