#3500 Clear Urethane Casting / Coating Resin is perfectly water clear and won't yellow or discolor in high humidity environments or with UV exposure. This room temperature cure, two-part casting resin can be poured to create exceptionally rigid, durable, and impact resistant parts in applications that previously used acrylic or polycarbonate. Typical applications include: lenses, clear reproduction parts, decorative pieces, prototype models, tabletops, encapsulations, and as a UV resistant coating on epoxy parts. This resin can pour castings up to 3" deep at a time.

When Used as a Coating Resin
#3500 Clear Urethane Casting / Coating Resin can also be brushed on final epoxy parts or laminations to create a thin, tough, optically clear surface. This casting resin is self-leveling and can be applied to surfaces without leaving brush marks. However, the low viscosity and non-thixotropic nature of this resin make it better suited for flat surface applications or as a thin surface coat on parts with minimal vertical surfaces.

When mixed thoroughly, pour the clear urethane slowly to aid the release of air bubbles. When using Clear Urethane Casting / Coating Resin, avoid water and all types of moisture contamination. Avoid direct contact with wood. 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.

• Mix Ratio (parts by weight) – 100A:72B
• Work Life (100 gram mass) – 25 minutes
• Maximum Casting Depth* - 3 inches
  *Castings greater than 3 inches can be step cast
• Demold Time – 12-16 hours
• Complete Cure – 5-7 days
• Cured Color – Optically Water Clear
• Hardness – 80 Shore D

 

Pour tough, flexible parts with Urethane Casting Resin Shore A. Available in two hardness variations, 40 Shore A and 60 Shore A. These urethane casting resins offer ease of use for softer, resilient part requirements. These urethane casting resins have been designed specifically for the pouring of prototype and production parts and can accept pigments to achieve opaque colors in finished castings.

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

 

This 60 Shore D hardness Urethane Casting Resin is well suited for demanding industrial applications. Extremely tough, this urethane casting resin system exhibits very high tensile and tear strength, excellent elongation, and good abrasion resistance. Easily pour this amber, lower viscosity material in open casts and closed molds to produce incredibly durable foundry tools, patterns, or parts.

When mixed thoroughly, pour the urethane slowly to aid the release of air bubbles. When using Urethane Casting Resin – 60 Shore D 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.

#3460 Urethane Casting Resin – 60 Shore D can completely cure at room temperature, but can also be heat cured up to 165°F. Typically, full properties of this urethane casting resin develop in 7 days at room temperature (75°F). Temperatures below 75°F will lengthen the cure time, and if the ambient temperature is below 60°F, additional heat may be necessary for proper cure. Allow casting to set for 12 to 18 hours at room temperature before an oven post cure of 8 hours at 150°F to 165°F. Allow to cool before demolding.

• Mix Ratio (by weight) – 100:44
• Color – Amber
• Working Time, 4 fl. Oz. mass @ 77°F – 26 minutes

 

For final parts and short-run castings, this white Urethane Casting Resin with 75 Shore D hardness can create detailed parts with superior cosmetic qualities. #3475 Urethane Casting Resin has a simple 1:1 mix ratio, and its low mixed viscosity makes it an ideal material to fill complicated molds. Cured castings are bright white and have great physical properties including: good tensile strength and superior stiffness in thin sections.

#3475 Urethane Casting Resin is a great material for high performance parts and castings. It can be used for the casting of prototypes to simulate molded parts or for the preproduction checking of injection molds. As a low viscosity material, it can be hand injected into the most detailed cavities.

When mixed thoroughly, pour the urethane slowly to aid the release of air bubbles. When using Urethane Casting Resin – 75 Shore D 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.

#3475 Urethane Casting Resin can fully cure at room temperature. Demold time for heavier section castings is 4 to 6 hours @ 77°F. Castings will develop strength sufficient for most applications in 18 to 24 hours at 77°F, and reach full cure in 7 days at room temperature. The full cure can be accelerated by oven curing after the material gels at room temperature. Oven cure at 150°F for 2-3 hours or oven cure at 120°F for 4-6 hours. Heat curing will increase the heat distortion temperature, and therefore improve the heat stability of the cured material.

• Mix Ratio (by weight) – 100:100
• Color – White
• Working Time, 4 fl. Oz. mass @ 77°F – 30-40 minutes

 

#4113 Fast Set Tooling / Prototyping Urethane Kit is a two-part urethane casting system for molds or parts. This metallic grey urethane cures rapidly, so it can be mixed, poured, and demolded very quickly. Most castings made with #4113 Fast Set Tooling / Prototyping Urethane Kit can be demolded in 30 to 40 minutes and can be put into service within a day.

With low shrinkage and low exotherm during cure, this stable urethane kit is ideal for making medium to large complicated casts. Use this smooth, easy-pour system to quickly create tooling, patterns, molds, fixtures, and much more. This urethane has outstanding cured properties including: heat resistance, exceptional hardness, and excellent cured stability.

#4113 Fast Set Tooling / Prototyping Urethane Kit has a simple 1:1 mix ratio by weight or volume. Once mixed, this urethane has a 5-6 minute pot life. Pour the urethane very slowly to aid the release of air bubbles. When using #4113 Fast Set Tooling / Prototyping Urethane Kit, avoid water and all types of moisture contamination. Do not use this urethane kit with PVA Release Film. To ensure a proper release from a mold, use at least four layers of #4121 Non-Silicone High Temp Paste Wax.

• Mix Ratio – 1:1 (by weight and volume)
• Color – Gray
• Pot Life, 4 fl. Oz. Mass, @ 77°F – 5-6 minutes