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Key Differences
| Product Type |
|
|
| Mixed Viscosity | 500 cps | 80 cps |
| Pot Life | 1.5 minutes | 7 minutes |
| Cure Time | 2 hours | 30 minutes |
| Shore D Hardness | — | 70 |
| Specific Volume | 105 cu. in./lb. | 26.4 cu. in./lb. |
| Color | Beige | White |
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!™ 15 | Smooth-Cast™ 305 | |
|---|---|---|
| Product Type |
|
|
| Mixed Viscosity | 500 cps | 80 cps |
| Mix Ratio By Volume | 1A:1B | 1A:1B |
| Mix Ratio By Weight | 100A:87B | 100A:90B |
| Pot Life | 1.5 minutes | 7 minutes |
| Tack Free Time | 20 minutes | — |
| Cure Time | 2 hours | 30 minutes |
| Shore D Hardness | — | 70 |
| Expansion (approximate) | 4 times | — |
| Foam Density | 15 lb/ft³ | — |
| Specific Gravity | 0.24 g/cc | 1.05 g/cc |
| Specific Volume | 105 cu. in./lb. | 26.4 cu. in./lb. |
| Color | Beige | White |
| Tensile Strength | — | 3,000 psi |
| Tensile Modulus | — | 134,000 psi |
| Elongation @ Break | — | 7.5 % |
| Compressive Strength | — | 3,800 psi |
| Compressive Modulus | — | 44,900 psi |
| Flexural Strength | — | 4,000 psi |
| Flexural Modulus | — | 118,000 psi |
| Shrinkage | — | 0.0065 in. / in. |
| Heat Deflection Temp | — | 120 °F |
Product Description
FOAM-iT!™ 15
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!™ 15 is tack-free in about 4 - 6.5 minutes, developing handling strength in 20 minutes and full cure in 2 hours.
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-Cast™ 305
The Smooth-Cast™ 300 Series of liquid plastics are ultra-low viscosity casting resins that yield castings that are bright white and virtually bubble free. Vacuum degassing is not necessary. They offer the convenience of a 1A:1B by volume or 100A:90B by weight mix ratio. The differences between them are pot life and demold time.
These resins readily accept fillers (such as URE-FIL™ 3 from Smooth-On) and can be colored with SO-Strong™ or Ignite™ color tints (Smooth-Cast™ 325 series accepts pigments better than the Smooth Cast™ 300 series). Fully cured castings are tough, durable, machinable and paintable. They resist moisture and mild solvents. Applications for Smooth-Cast™ 300 Series Liquid Plastics include reproducing small to medium size sculptures, making prototype models, special effect props and decorative jewelry.