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Key Differences
| Product Type |
|
|
| Mixed Viscosity | 300 cps | 1,400 cps |
| Pot Life | 1.5 minutes | 30 minutes |
| Cure Time | 2 hours | 16 hours |
| Shore A Hardness | — | 50 |
| Specific Volume | 420 cu. in./lb. | 26.7 cu. in./lb. |
| Color | Black | Clear Amber |
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 | PMC™-121 50/WET | |
|---|---|---|
| Product Type |
|
|
| Mixed Viscosity | 300 cps | 1,400 cps |
| Mix Ratio By Volume | 1A:1B | 1A:1B |
| Mix Ratio By Weight | 100A:87B | 1A:1B |
| Pot Life | 1.5 minutes | 30 minutes |
| Tack Free Time | 20 minutes | — |
| Cure Time | 2 hours | 16 hours |
| Shore A Hardness | — | 50 |
| Expansion (approximate) | 14 times | — |
| Foam Density | 4 lb/ft³ | — |
| Specific Gravity | 0.06 g/cc | 1.04 g/cc |
| Specific Volume | 420 cu. in./lb. | 26.7 cu. in./lb. |
| Color | Black | Clear Amber |
| Die C Tear Strength | — | 85 pli |
| Tensile Strength | — | 350 psi |
| Elongation @ Break | — | 500 % |
| 100% Modulus | — | 82 psi |
| Shrinkage | — | < .001 in. / in. |
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.
PMC™-121 50/WET
The PMC™-121 Series urethane rubbers feature convenient one-to-one by volume mix ratios. PMC™-121/50 is a “wet-only” mold rubber that is long lasting and durable when used in a variety of applications including reproduction of ornamental plaster, precast concrete and ceramic case molds. Note: “wet” rubber has a higher net shrinkage value vs. “dry” rubber.