Hardness Hardness |
---|
Material Material |
---|
|
Maximum Temperature Maximum Temperature |
---|
|
Volume Volume |
---|
|
Time to Harden Time to Harden |
---|
|
|
|
Time to Cure Time to Cure |
---|
|
|
|
DFARS (Defense Acquisition Regulations Supplement) DFARS (Defense AcquisitionRegulations Supplement) |
---|
Time to Demold Time to Demold |
---|
|
|
|
RoHS (Restriction of Hazardous Substances) RoHS (Restriction ofHazardous Substances) |
---|
|
REACH (Registration, Evaluation, Authorization and Restriction of Chemicals) REACH (Registration,Evaluation, Authorization and Restriction of Chemicals) |
---|
|
Component Component |
---|
|
Particle Size Particle Size |
---|
|
Specifications Met Specifications Met |
---|
|
Performance Properties Performance Properties |
---|
|
Certificate Certificate |
---|
![]() | |
Machinable Casting Compounds

After these compounds cure, they're tough enough to be machined. They are easy-to-mix two-part compounds that capture intricate details when creating prototypes, molds, and linings.
View our selection of release agents. View additional information about the hardness of these materials.
Hardness | Time to Harden | Time to Cure | Time to Demold | Cure Temperature, °F | Max. Temperature, °F | Shrinkage | Color | Mixing Required | Volume, cu. in. | Weight, lbs. | Each | |
Epoxy | ||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|
Hard | ||||||||||||
Durometer 86D | 50 min. | 18 hrs. | 18 hrs. | 75° | 130° | 1.5% | Gray | Yes | 40 | 2.7 | 00000000 | 000000 |
Aluminum-Filled Urethane | ||||||||||||
Hard | ||||||||||||
Durometer 83D | 6 min. | 18 hrs. | 2 hrs. | 75° | 175° | 1.5% | Gray | Yes | 83 | 5 | 00000000 | 000000 |
Durometer 83D | 6 min. | 18 hrs. | 2 hrs. | 75° | 175° | 1.5% | Gray | Yes | 334 | 20 | 00000000 | 000000 |
Casting Compounds

Capture intricate details when creating prototypes, molds, and linings with these easy-to-mix two-part compounds. This urethane is water and abrasion resistant.
View our selection of release agents. View additional information about the hardness of these materials.
Hardness | Time to Harden | Time to Cure | Time to Demold | Cure Temperature, °F | Max. Temperature, °F | Shrinkage | Color | Mixing Required | Volume, cu. in. | Weight, lbs. | Each | |
Urethane | ||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|
Soft | ||||||||||||
Durometer 20A | 15 min. | 168 hrs. | 5 hrs. | 77° | 180° | 1.5% | Black | Yes | 25 | 1 | 0000000 | 000000 |
Durometer 20A | 15 min. | 168 hrs. | 5 hrs. | 77° | 180° | 1.5% | Black | Yes | 250 | 10 | 0000000 | 000000 |
Firm | ||||||||||||
Durometer 40A | 15 min. | 168 hrs. | 5 hrs. | 77° | 180° | 1.5% | Black | Yes | 25 | 1 | 0000000 | 00000 |
Durometer 40A | 15 min. | 168 hrs. | 5 hrs. | 77° | 180° | 1.5% | Black | Yes | 250 | 10 | 0000000 | 000000 |
Durometer 60A | 15 min. | 168 hrs. | 2 hrs. | 77° | 180° | 0.5% | Black | Yes | 25 | 1 | 0000000 | 00000 |
Durometer 60A | 15 min. | 168 hrs. | 2 hrs. | 77° | 180° | 0.5% | Black | Yes | 250 | 10 | 0000000 | 000000 |
Hard | ||||||||||||
Durometer 80A | 15 min. | 168 hrs. | 3 hrs. | 77° | 180° | 1.5% | Black | Yes | 6 | 1/4 | 0000000 | 00000 |
Durometer 80A | 15 min. | 168 hrs. | 3 hrs. | 77° | 180° | 1.5% | Black | Yes | 25 | 1 | 0000000 | 00000 |
Durometer 80A | 15 min. | 168 hrs. | 3 hrs. | 77° | 180° | 1.5% | Black | Yes | 250 | 10 | 0000000 | 000000 |
Durometer 94A | 15 min. | 168 hrs. | 2 hrs. | 77° | 180° | 1.5% | Black | Yes | 25 | 1 | 0000000 | 00000 |
Durometer 94A | 15 min. | 168 hrs. | 2 hrs. | 77° | 180° | 1.5% | Black | Yes | 250 | 10 | 0000000 | 000000 |
Durometer 60D | 15 min. | 168 hrs. | 2 hrs. | 77° | 180° | 1.5% | Black | Yes | 25 | 1 | 0000000 | 00000 |
Durometer 60D | 15 min. | 168 hrs. | 2 hrs. | 77° | 180° | 1.5% | Black | Yes | 250 | 10 | 0000000 | 000000 |
Durometer 85D | 5 min. | 2 hrs. | 1.5 hrs. | 77° | 180° | 1.5% | Blue-Green | Yes | 80 | 5 | 000000 | 00000 |
Durometer 85D | 5 min. | 2 hrs. | 1.5 hrs. | 77° | 180° | 1.5% | Blue-Green | Yes | 320 | 20 | 000000 | 000000 |
See-Through Casting Compounds

Create transparent molds to monitor fill levels, differentiate parts at a glance, and avoid damaging parts when cutting the mold away. These casting compounds are two parts that activate when mixed.
Urethane compounds create hard molds, which are good for delicate and intricate shapes because the small contours won't deform or collapse when the material is poured in. Although not required, curing urethane molds inside a vacuum chamber improves their clarity. By removing trapped air bubbles, the chamber prevents the finished mold from looking speckled.
Silicone compounds handle higher temperatures than urethane compounds—up to 570° F. Silicone also cures faster than urethane, and it won't shrink as it cures, which means you won't need to guess at the final size of your mold. Because silicone compounds trap air bubbles when mixed, they must be cured inside a vacuum chamber. The chamber removes the trapped air bubbles, strengthens the mold, and improves its clarity.
View our selection of release agents. View additional information about the hardness of these materials.
Hardness | Time to Harden | Time to Cure | Time to Demold | Max. Temperature, °F | Shrinkage | Color | Mixing Required | Volume, cu. in. | Weight, lbs. | Each | |
Urethane | |||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|
Hard | |||||||||||
Durometer 80A | 6 min. | 144 hrs. @ 77° F | 2 hrs. @ 77° F | 180° | 5% | Clear | Yes | 25 | 1 | 0000000 | 000000 |
Durometer 75D | 6 min. | 144 hrs. @ 77° F | 2 hrs. @ 77° F | 180° | 5% | Clear | Yes | 25 | 1 | 0000000 | 00000 |
Silicone Rubber | |||||||||||
Firm | |||||||||||
Durometer 40A | 10 min. | 1.5 hrs. @ 77° F, 30 min. @ 120° F | 1.5 hrs. @ 77° F, 30 min. @ 120° F | 570° | 0% | Blue | Yes | 57 | 2.2 | 0000000 | 000000 |
Fast-Setting Casting Compounds
Create detailed rubber shapes that are ready to use in fifteen minutes or less. Unlike traditional casting compounds, which can take up to 24 hours to set, these compounds harden after two minutes, and can be removed from molds within fifteen. Use them to make your own prototypes, molds, and linings.
Combine acrylic or silicone with a 69° cure temperature compounds in different ratios to adjust the consistency from thin to thick. Thin mixtures are easier to pour and better for filling small crevices. Thick mixtures will shrink less as they dry.
Silicone with a 70° cure temperature compounds are a putty that you can mix with your hands and form into any shape. Press an object into these compounds to create a mold for casting duplicates. They do not shrink as they dry, so textures and other fine details are captured faithfully. Soft silicone is more flexible and easier to peel off of molds than firm silicone, especially when making complex shapes.Firm silicone holds its shape better than soft silicone, so small ridges and channels are less likely to collapse or deform while making molds.
Compounds with dispenser gun come ready to use—no mixing required—and won’t leave a mess.


Hardness | Time to Harden | Time to Cure | Time to Demold | Cure Temperature, °F | Max. Temperature, °F | Shrinkage | Color | Mixing Required | Volume, cu. in. | Weight, lbs. | Each | |
Acrylic | ||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|
Hard | ||||||||||||
Durometer 85D | 2 min. | 11 min. | 11 min. | 69° | 350° | 1.5% | Light Blue | Yes | 20 | 1 | 0000000 | 0000000 |
Durometer 85D | 2 min. | 11 min. | 11 min. | 69° | 350° | 1.5% | Light Blue | Yes | 62 | 3 | 0000000 | 000000 |
Silicone | ||||||||||||
Soft | ||||||||||||
Durometer 27A | 2 min. | 15 min. | 15 min. | 70° | 650° | 0% | Light Blue | Yes | 4 | 0.2 | 0000000 | 00000 |
Durometer 27A | 2 min. | 15 min. | 15 min. | 70° | 650° | 0% | Light Blue | Yes | 46 | 2.2 | 0000000 | 000000 |
Durometer 30A | 2 min. | 10 min. | 10 min. | 69° | 250° | 0% | Green | Yes | 8 | 0.5 | 0000000 | 00000 |
Durometer 30A | 2 min. | 10 min. | 10 min. | 69° | 250° | 0% | Green | Yes | 23 | 1.1 | 0000000 | 000000 |
Firm | ||||||||||||
Durometer 40A | 2 min. | 15 min. | 15 min. | 70° | 600° | 0% | Green | Yes | 4 | 0.2 | 0000000 | 00000 |
Durometer 40A | 2 min. | 15 min. | 15 min. | 70° | 600° | 0% | Green | Yes | 46 | 2.2 | 0000000 | 000000 |
Durometer 50A | 2 min. | 10 min. | 10 min. | 69° | 250° | 0% | Light Blue | Yes | 13 | 0.8 | 0000000 | 000000 |
Durometer 50A | 2 min. | 10 min. | 10 min. | 69° | 250° | 0% | Light Blue | Yes | 32 | 1.75 | 0000000 | 000000 |

Hardness Rating | Hardness | Time to Harden | Time to Cure | Time to Demold | Color | Cure Temperature, °F | Max. Temperature, °F | Shrinkage | Mixing Required | Weight, lbs. | Includes | Each | |
Silicone | |||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Soft | Durometer 30A | 2 min. | 10 min. | 10 min. | Green | 69° | 250° | 0% | No | 4 | Carrying Case, Six each 3 cu. in. Disposable Cartridges | 0000000 | 0000000 |
Soft Firm | Durometer 30A Durometer 55A | 2 min. 2 min. | 10 min. 6 min. | 10 min. 6 min. | Green Orange | 69° | 250° | 0% | No | 4 | Carrying Case, Six each 3 cu. in. Disposable Cartridges | 0000000 | 000000 |
Firm | Durometer 55A | 2 min. | 6 min. | 6 min. | Orange | 69° | 250° | 0% | No | 4 | 15 Disposable Nozzles, 2 Snap-On Nozzles, Carrying Case, Six each 3 cu. in. Disposable Cartridges | 0000000 | 000000 |
Fine-Detail Casting Compounds

Replicate even the most complex details when creating prototypes, molds, and linings. This easy-to-mix two-part compound flows smoothly into crevices.
View our selection of release agents. View additional information about the hardness of these materials.
Easy-to-Work Casting Compounds

Combine the liquid components to form a putty that can be molded into or around any shape. Use these compounds to capture intricate details when creating prototypes, molds, and linings.
View our selection of release agents. View additional information about the hardness of these materials.
Hardness | Time to Harden | Time to Cure | Time to Demold | Cure Temperature, °F | Max. Temperature, °F | Shrinkage | Color | Mixing Required | Volume, cu. in. | Weight, lbs. | Each | |
Urethane | ||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|
Firm | ||||||||||||
Durometer 60A | 15 min. | 168 hrs. | 3 hrs. | 75° | 180° | 1.5% | Black | Yes | 25 | 1 | 0000000 | 000000 |
Durometer 60A | 15 min. | 168 hrs. | 3 hrs. | 75° | 180° | 1.5% | Black | Yes | 100 | 4 | 0000000 | 000000 |
Hard | ||||||||||||
Durometer 85A | 15 min. | 168 hrs. | 3 hrs. | 75° | 180° | 1.5% | Black | Yes | 25 | 1 | 0000000 | 00000 |
Durometer 85A | 15 min. | 168 hrs. | 3 hrs. | 75° | 180° | 1.5% | Black | Yes | 100 | 4 | 0000000 | 000000 |
Long-Life Casting Compounds

Create rubber molds that retain their shape for decades—they won’t soften, degrade, or warp, so you can continue to replicate intricate parts. Because these compounds don’t shrink as they cure, they are more accurate and predictable than other compounds.
View our selection of release agents. View additional information about the hardness of these materials.
Hardness | Time to Harden | Time to Cure | Time to Demold | Cure Temperature, °F | Max. Temperature, °F | Shrinkage | Color | Mixing Required | Volume, cu. in. | Weight, lbs. | Each | |
Urethane | ||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|
Firm | ||||||||||||
Durometer 45A | 60 min. | 24 hrs. | 16 hrs. | 77° | 200° | 0% | Yellow | Yes | 58 | 2.2 | 0000000 | 0000000 |
Food Industry Casting Compounds

These food-grade compounds comply with FDA 21 CFR. They are easy-to-mix two-part compounds that capture intricate details when creating prototypes, molds, and linings.
View our selection of release agents. View additional information about the hardness of these materials.
Hardness | Time to Harden | Time to Cure | Time to Demold | Cure Temperature, °F | Max. Temperature, °F | Shrinkage | Color | Mixing Required | Specifications Met | Volume, cu. in. | Weight, lbs. | Each | |
Urethane | |||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Firm | |||||||||||||
Durometer 60A | 8 min. | 12 hrs. | 2 hrs. | 120° | 180° | 5% | White | Yes | FDA Compliant 21 CFR 175.105, FDA Compliant 21 CFR 177.1680 | 25 | 1 | 0000000 | 000000 |
Durometer 60A | 8 min. | 12 hrs. | 2 hrs. | 120° | 180° | 5% | White | Yes | FDA Compliant 21 CFR 175.105, FDA Compliant 21 CFR 177.1680 | 250 | 10 | 0000000 | 000000 |
Hard | |||||||||||||
Durometer 78A | 4 min. | 12 hrs. | 2 hrs. | 120° | 180° | 5% | White | Yes | FDA Compliant 21 CFR 175.105, FDA Compliant 21 CFR 177.1680 | 25 | 1 | 0000000 | 00000 |
Durometer 78A | 4 min. | 12 hrs. | 2 hrs. | 120° | 180° | 5% | White | Yes | FDA Compliant 21 CFR 175.105, FDA Compliant 21 CFR 177.1680 | 250 | 10 | 0000000 | 000000 |
Durometer 88A | 4 min. | 12 hrs. | 2 hrs. | 120° | 180° | 5% | White | Yes | FDA Compliant 21 CFR 175.105, FDA Compliant 21 CFR 177.1680 | 25 | 1 | 0000000 | 00000 |
Durometer 88A | 4 min. | 12 hrs. | 2 hrs. | 120° | 180° | 5% | White | Yes | FDA Compliant 21 CFR 175.105, FDA Compliant 21 CFR 177.1680 | 250 | 10 | 0000000 | 000000 |
Durometer 75D | 5 min. | 12 hrs. | 2 hrs. | 120° | 180° | 5% | White | Yes | FDA Compliant 21 CFR 175.105, FDA Compliant 21 CFR 177.1680 | 25 | 1 | 0000000 | 00000 |
Durometer 75D | 5 min. | 12 hrs. | 2 hrs. | 120° | 180° | 5% | White | Yes | FDA Compliant 21 CFR 175.105, FDA Compliant 21 CFR 177.1680 | 250 | 10 | 0000000 | 000000 |
High-Temperature Casting Compounds

Capture intricate details when creating prototypes, molds, and linings with these easy-to-mix compounds.
Alumina is high strength.
High-purity alumina resists shrinking in casts, has a low level of contamination, and is a strong electrical insulator. It’s often used for constructing furnaces and handling liquid metal.
Silicon carbide has a high heat transfer rate, making it ideal for use in metal casting molds. It has the added benefit of excellent erosion and oxidation resistance.
Silica withstands rapid changes in temperature without cracking and has a low rate of thermal expansion.
Zirconium oxide is often used in metal handling applications. In addition to its high temperature resistance, it’s also chemical resistant.
View our selection of release agents.
Time to Harden | Time to Cure | Time to Demold | Cure Temperature, °F | Max. Temperature, °F | Shrinkage | Color | Mixing Required | Volume, cu. in. | Weight, lbs. | Each | |
Alumina | |||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|
20 min. | 24 hrs. | 24 hrs. | 77° | 3000° | 1.5% | White | Yes | 38 | 4 | 0000000 | 000000 |
20 min. | 24 hrs. | 24 hrs. | 77° | 3000° | 1.5% | White | Yes | 96 | 10 | 0000000 | 000000 |
High-Purity Alumina | |||||||||||
25 min. | 24 hrs. | 24 hrs. | 77° | 3200° | 1.5% | White | Yes | 98 | 10 | 0000000 | 000000 |
Silicon Carbide | |||||||||||
20 min. | 24 hrs. | 24 hrs. | 77° | 2700° | 1.5% | Black | Yes | 47 | 4 | 0000000 | 00000 |
20 min. | 24 hrs. | 24 hrs. | 77° | 2700° | 1.5% | Black | Yes | 119 | 10 | 0000000 | 000000 |
Silica | |||||||||||
20 min. | 24 hrs. | 24 hrs. | 77° | 2700° | 1.5% | White | Yes | 62 | 4 | 0000000 | 00000 |
20 min. | 24 hrs. | 24 hrs. | 77° | 2700° | 1.5% | White | Yes | 155 | 10 | 0000000 | 000000 |
Zirconium Oxide | |||||||||||
20 min. | 24 hrs. | 24 hrs. | 77° | 4000° | 1.5% | Tan | Yes | 27 | 4 | 0000000 | 000000 |
20 min. | 24 hrs. | 24 hrs. | 77° | 4000° | 1.5% | Tan | Yes | 69 | 10 | 0000000 | 000000 |
Chemical-Resistant Casting Compounds

This silicone compound offers good resistance to acids, oils and salt water. Use it to capture intricate details when creating prototypes, molds, and linings with this easy-to-mix two-part compound. It is a durable and tear-resistant silicone, which easily demolds.
View our selection of release agents. View additional information about the hardness of these materials.
Nonporous Alumina Ceramic Powder

- Color: White
- Temperature Range: 0° F to 3,630° F
- Fabrication: See table
Alumina ceramics withstand higher temperatures than any other ceramic and are highly chemical resistant. This powder is high purity, so it’s inert even at high temperatures. Because alumina is ultra hard, it can be used in applications that require superior strength. It is also wear resistant, making it suitable for high-wear applications. Both thermally and electrically insulating, alumina can also be used in high-temperature and high-power electrical applications. Finished products made from alumina powder are nonporous, so they will seal out air and gas. Powder is often used in casting processes. Add it to slurries to create custom parts and tools such as crucibles, cutting tools, and laboratory ware. Alumina powder also is often used as a friction material, such as in brake linings.
Choose a particle size based on the application of your finished piece. Finer powders can be processed into finished pieces that will be harder, stronger, and more wear-resistant than those made with coarse grains. They may also have a finer finish. Parts made with coarse grain powders can be processed into pieces that are more porous and thermally shock-resistant than pieces made with finer grains. Mixing sizes can combine these properties.
99.3% aluminum oxide powder is slightly more reactive than 99.5% aluminum oxide powder because it’s less pure. It’s commonly used for polishing, lapping, and buffing.
99.5% aluminum oxide powder is more pure than 99.3% aluminum oxide, so it’s less reactive. It’s often used in the ceramic, glass, and foundry industries.
Certificates with a traceable lot number are available for these products. Download certificates from ORDER HISTORY after your order ships.
5 lb. Pail | 10 lb. Pail | 25 lb. Pail | ||||||
---|---|---|---|---|---|---|---|---|
Particle Size | Particle Mesh Size | Fabrication | Each | Each | Each | |||
99.3% Aluminum Oxide | ||||||||
Fine Grit | ||||||||
4-7 microns | __ | Heat Treated | 00000000 | 000000 | 00000000 | 000000 | 00000000 | 000000 |
70 microns | __ | Heat Treated | 00000000 | 00000 | 00000000 | 00000 | 00000000 | 00000 |
99.5% Aluminum Oxide | ||||||||
Fine Grit | ||||||||
45 microns | -325 | __ | 00000000 | 00000 | 00000000 | 00000 | 000000 | 00 |
150 microns | -100 | __ | 00000000 | 00000 | 00000000 | 00000 | 000000 | 00 |
Medium Grit | ||||||||
300 microns | -48 | __ | 00000000 | 00000 | 00000000 | 00000 | 000000 | 00 |
300-600 microns | 28-48 | __ | 00000000 | 00000 | 00000000 | 00000 | 000000 | 00 |
Coarse Grit | ||||||||
600-1400 microns | 14-28 | __ | 00000000 | 00000 | 00000000 | 00000 | 000000 | 00 |