Color Color |
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![]() | Yellow |
Hardness Hardness |
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Hardness Rating Hardness Rating |
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Shrinkage Shrinkage |
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Time to Harden Time to Harden |
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Time to Cure Time to Cure |
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Material Material |
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Maximum Temperature Maximum Temperature |
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Volume Volume |
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Mixing Required Mixing Required |
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Time to Demold Time to Demold |
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Cure Temperature Cure Temperature |
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Weight Weight |
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DFARS (Defense Acquisition Regulations Supplement) DFARS (Defense AcquisitionRegulations Supplement) |
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RoHS (Restriction of Hazardous Substances) RoHS (Restriction ofHazardous Substances) |
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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 | ||||||||||||
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Firm | ||||||||||||
Durometer 45A | 60 min. | 24 hrs. | 16 hrs. | 77° | 200° | 0% | Yellow | Yes | 58 | 2.2 | 0000000 | 0000000 |