Urethane Casting Resin - Shore A

Details

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 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 or in paper mixing containers. #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

What Is Shore A Urethane Casting Resin?

Shore A Urethane Casting Resin is a two-part urethane for pouring tough, flexible parts and molds, available in two hardness options: 40 Shore A (#3340) and 60 Shore A (#3360). These urethanes are designed for prototype and production parts and flexible tooling, and they can also make fast flexible molds with undercuts or negative draft.

Why Choose Shore A Urethane Casting Resin?

Where silicone can make flexible, lower-cost molds, Shore A Urethane offers superior tear strength and 3 to 4 times the mold life, which is the main reason to choose it for flexible tooling. The two hardnesses let you tune flexibility: 40 Shore A is softer, 60 Shore A is firmer. Shore A resins accept pigments for opaque colors in finished castings and are popular in automotive applications. For rigid castings, the 75 Shore D #3475 or 60 Shore D #3460 are the right choice instead.

What Are the Best Applications for Shore A Urethane Casting Resin?

Shore A Urethane Casting Resin is designed for flexible prototype and production parts and for flexible molds with undercuts or negative draft that need long mold life and high tear strength. Choose 40 Shore A for softer parts and 60 Shore A for firmer ones.

How Should Shore A Urethane Casting Resin Be Used for Best Results?

Shore A Urethane Casting Resin is mixed thoroughly and poured slowly to release air bubbles. Avoid water and all moisture contamination, and do not use PVA Release Film, wooden stir sticks, or paper containers. Use #2333 Plastic Paint Stirrers and release with at least four layers of #4121 Non-Silicone High Temp Paste Wax. These urethanes cure fully at room temperature or can be heat cured up to 150 degrees F for faster production. The 40 Shore A mixes 100:75 by weight with about 25 minutes of working time on a 4 fl oz mass at 77 degrees F. The 60 Shore A mixes 100:55 by weight with about 15 minutes of working time.

Technical Specifications

Type: Two-part flexible urethane casting resin, light amber; accepts pigments

40 Shore A (#3340): mix 100:75 by weight; working time about 25 minutes; demold 2.5 to 3 hours at 75 degrees F, or 30 to 40 minutes with 150 degree F cure

60 Shore A (#3360): mix 100:55 by weight; working time about 15 minutes; demold 2 to 2.5 hours at 75 degrees F, or 30 to 40 minutes with 150 degree F cure

Offers superior tear strength and 3 to 4 times the mold life of silicone

Available Sizes and SKUs

#3340-A - 40 Shore A quart kit (Part A quart, Part B pint)

#3340-B - 40 Shore A gallon kit

#3360-A - 60 Shore A quart kit (Part A quart, Part B pint)

#3360-B - 60 Shore A gallon kit

Every product Fibre Glast sells is First Quality Guaranteed, so you can pour flexible parts and molds with confidence.

Data Sheets

Product Data Sheet 3340 Safety Data Sheet 3360 Safety Data Sheet

Shipping

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.

Sizes

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.

WARNING: Reproductive Harm. For more information go to www.P65warnings.ca.gov/

Pricing

Product pricing and order quantities for Urethane Casting Resin - Shore A
Item	Quantity and line total	Description	Price	Quantity and line total
3340-A	Quart Kit - 40 Shore A (Part A: 2 lbs/Part B: 1.5 lbs)	3340-AQuart Kit - 40 Shore A (Part A: 2 lbs/Part B: 1.5 lbs) $169.69/ea	$169.69/ea	Quantity for 3340-A Line total 3340-A $0.00

3340-B	Gallon Kit - 40 Shore A (Part A: 8 lbs/Part B: 6 lbs)	3340-BGallon Kit - 40 Shore A (Part A: 8 lbs/Part B: 6 lbs) $424.31/ea	$424.31/ea	Quantity for 3340-B Line total 3340-B $0.00

3360-A	Quart Kit - 60 Shore A (Part A: 2 lbs/Part B: 1.1 lbs)	3360-AQuart Kit - 60 Shore A (Part A: 2 lbs/Part B: 1.1 lbs) $190.91/ea	$190.91/ea	Quantity for 3360-A Line total 3360-A $0.00

3360-B	Gallon Kit - 60 Shore A (Part A: 8 lbs/Part B: 4.4 lbs)	3360-BGallon Kit - 60 Shore A (Part A: 8 lbs/Part B: 4.4 lbs) $466.75/ea	$466.75/ea	Quantity for 3360-B Line total 3360-B $0.00