Smooth-On Encapso K
- Rachel Vroman
- Caleb Marhoover (Unlicensed)
Owned by Rachel Vroman
Considerations for this method
PROS:
- 1:1 mix ratio of two components by volume
- High transparency/clarity
- Can be colored with special pigments
CONS:
- Incompatible with some materials (chemically inhibiting the curing process)
- Edges crumble easily; may be difficult to de-mold without damage
- Low Viscosity, requires water-tight mold
Material choices
| METHOD | MATERIAL | COST ($/cubic inch) | TIME: total | Production Steps | Time required | Special Equipment Needed | Conditions | Able to be colored? | health and safety | Chemical Composition | PPE | Where to Purchase | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Silicon Casting Rubber | Encapso K | $0.50 | 17 hours (1 hour preparation and 16 hours cure time) | Measure each component of the 2-part product into mixing container as specified by manufacturer's instructions. Stir thoroughly to combine two components. Pour into the lowest point of the model/mold to avoid trapping air bubbles. Allow 16 hours for substance to cure before handling. | Pot life is 120 minutes. Cure time is 16 hours, regardless of volume. Curing can be accelerated by applying mild heat (up to 60º C). | Clean mixing container with volume measurement marks and stir stick. Vacuum chamber to degas the mixed substance before it is poured into mold/model. | Product is a platinum-cure silicone rubber, and is incompatible with materials bearing platinum-cure inhibitors. Will not cure if ratio of two components is not accurately measured. Cured product tears easily; requires delicate handling and removal from mold to retain transparency. This is a low viscosity liquid: mold must be tightly sealed to contain the liquid substance before it cures. | Yes. Add a small amount of Silc Pig™ color pigment to Part A and mix thoroughly. Combine equal amount of Part B. | Part A: No data on possible toxicological effets available. Part B: No data on possible toxicological effets available. | Unlisted | Vinyl gloves to limit skin contact, splash goggles to prevent contact with eye. (latex gloves will inhibit cure of the product) | Reynolds Advanced Materials |
Mold preparation:
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