Description
QM 128 is a two-component, room temperature, condensation cure silicone material. The cured rubber has excellent mechanical properties and shelf-life stability. This material is an excellent choice for the molding of intricate patterns, skin molding and applications where high durometer, dimensional stability and extremely tough rubber are required. A variety of catalysts are offered with this material.
| Packing | Weight | Mix Ratio |
| Gallon Pail Kit | 11 lbs | 10:1 |
| 5 Gallon Pail Kit | 44 lbs | 10:1 |
| 55 Gallon Drum Kit | 550 lbs | 10:1 |
KEY FEATURES
High tear strength
Low viscosity
Fast de-mold time
The standard catalyst for QM 128 is QM Cat Purple.
Additional catalysts include QM Cat Blue, QM Cat Red 3 QM Cat Clear, various thixotropic catalysts and QM Cat Clear FG for indirect food contact applications.
*Complies with FDA indirect food contact regulation CFR177.2600 only when used with QM Cat Clear FG. Refer to QM Cat Clear FG data sheet for typical properties. MAIN APPLICATIONS Molds for polyester, polyurethane and epoxy resin castings Molds for technical articles and prototypes Molds for small and large statues
| Uncatalyzed | ||||
| TEST | QM 113 | QM CAT PURPLE | QM CAT BLUE | QM CAT RED 3 |
| Color | Beige | Purple | Blue | Red |
| Viscosity | 35,000 cps | 100 csp | 100 cps | 100 cps |
| Specific Gravity | 1.31 | 1.00 | 1.00 | 1.00 |
| Catalyzed | |||
| Mix Ratio 10:1 by weight | |||
| PROPERTY | QM CAT PURPLE | QM CAT BLUE | QM CAT RED 3 |
| Color | Light Purple | Light Blue | Light Red |
| Viscosity | 30,000 cps | 30,000 cps | 30,000 cps |
| Specific Gravity | 1.30 | 1.30 | 1.30 |
| Work life at 25°C | 35 minutes | 45 minutes | 7 minutes |
| Durometer shore A, 24 hour | 24 | 24 | 24 |
| Tack-free time | 4-6 hours | 6-8 hours | 45-60 minutes |
| Demold time | 12-16 hours | 16-24 hours | 4-6 hours |
| Cured Properties | |
| 3 Days @ 25°C | |
| Durometer, Shore A | 28 |
| Tensile Strength | 500 psi |
| Elongation | 400% |
| Tear B | 140 ppi |
| Linear Shrinkage | <0.3% |
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