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Key Differences
| Product Type |
|
|
| Mixed Viscosity | 300 cps | 30,000 cps |
| Mix Ratio By Volume | 1A:1B | N/A (gram scale required) |
| Pot Life | 1.5 minutes | 45 minutes |
| Cure Time | 2 hours | 16 hours |
| Shore A Hardness | — | 60 |
| Specific Volume | 420 cu. in./lb. | 22.2 cu. in./lb. |
| Color | Black | Green |
Disclaimer
Although we do our best to ensure accuracy, Smooth-On offers no warranties, promises, and/or representations of any kind, either expressed or implied, as to the accuracy, completeness, or reliability of the information contained on this Compare Tool, nor suitability of the information contained herein to your particular circumstances. Smooth-On assumes no liability for losses or damages of whatever nature (direct, indirect, consequential or other) associated with your use, or inability to use, the Compare Tool, or from your use (or failure to use) the information contained herein. Other useful tools include product technical bulletins and our extensive FAQ section. You can also contact our technical support team.All Technical Data
| FOAM-iT!™ 4 BLACK | Smooth‑Sil™ 960 | |
|---|---|---|
| Product Type |
|
|
| Mixed Viscosity | 300 cps | 30,000 cps |
| Mix Ratio By Volume | 1A:1B | — |
| Mix Ratio By Weight | 100A:87B | 100A:10B |
| Pot Life | 1.5 minutes | 45 minutes |
| Tack Free Time | 20 minutes | — |
| Cure Time | 2 hours | 16 hours |
| Shore A Hardness | — | 60 |
| Expansion (approximate) | 14 times | — |
| Foam Density | 4 lb/ft³ | — |
| Specific Gravity | 0.06 g/cc | 1.25 g/cc |
| Specific Volume | 420 cu. in./lb. | 22.2 cu. in./lb. |
| Color | Black | Green |
| Die B Tear Strength | — | 110 pli |
| Tensile Strength | — | 650 psi |
| Elongation @ Break | — | 270 % |
| 100% Modulus | — | 280 psi |
| Shrinkage | — | <.001 in. / in. |
| Useful Temperature (min) | — | -65 °F |
| Useful Temperature (max) | — | 450 °F |
Product Description
FOAM-iT!™ 4 BLACK
Smooth-On’s FOAM-iT!™ Series are two-component water blown rigid foams that are versatile and easy to use. FOAM-iT!™ products are available in 3lb., 4 lb., 5 lb., 8 lb., 10 lb.,15 lb. or 26 lb. per cubic foot densities. Parts A and B are measured and mixed in equal amounts by volume. The mixture is then poured into a mold or other form (apply release agent if necessary). The mixture will expand many times original volume (depending on which FOAM-iT!™ product you are using) and develop a uniform cell structure. FOAM-iT!™ 4 Black is pre-pigmented to a very deep black color.
All FOAM-iT!™ products can be used as a straight casting material, backfill material for hollow castings (adds structural strength) or as an encapsulation material, etc. They can be color pigmented with SO-Strong™, UVO™ or IGNITE™ colorants and are used for a variety of art/ craft, industrial design and special effects applications
› Click here for more FOAM-iT!™ rigid foam products.
Smooth‑Sil™ 960
Smooth-Sil™ 960 is a Shore 60A platinum cure silicone rubber developed for a variety of industrial applications. Compared to other 60A platinum silicones, Smooth-Sil™ 960 has a relatively low viscosity and is easy to mix, de-air and pour. Silicone cures in 16 hours with negligible shrinkage to a firm rubber with high tensile and tear strength.
Smooth-Sil™ 960 offers good chemical and heat resistance, making this a good choice for production casting of resins and expanding foams. Because of its firmness, Smooth-Sil™ 960 molds are also used for spin casting. It is also used for embedding and electrical applications. Smooth-Sil™ 960 is suitable for food related applications.
Note: This product will not cure against surfaces containing sulfur, even when sealed.