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High tear strength and excellent elongation for demanding dynamic sealing applications.
Outstanding resistance to compression set, ensuring long-term sealing performance under continuous stress.
Good adhesion to common substrates including metals, plastics, and coated surfaces without primer.
Wide service temperature range from –55 °C to +200 °C (short-term peak up to 250 °C).
Low volatility and low extractables, meeting stringent requirements for automotive and medical-adjacent applications.
Automotive under-hood gaskets and vibration-damping mounts.
Industrial fluid-handling seals exposed to oils, coolants, and brake fluids.
Electrical enclosures requiring environmental protection and thermal stability.
Appliance door seals and thermal interface pads in HVAC and cooking equipment.
Medical device housings where biocompatibility support and cleanroom compatibility are critical.
| Chemical Type | Platinum-cured addition-cure silicone elastomer |
| Product Form | Two-part liquid system (Part A: base; Part B: catalyst) |
| Appearance | Translucent to milky viscous liquid (Part A); colorless to pale yellow liquid (Part B) |
| Primary Applications | High-performance molded seals, gaskets, and encapsulation components |
| Key Features | Fast cure at elevated temperatures, low shrinkage, excellent dimensional stability |
| Benefits | Reduced cycle times, minimal post-cure requirements, consistent part-to-part reproducibility |
| Cure System | Platinum-based addition reaction (inhibitor-free, no byproducts) |
| Shelf Life | 12 months at ≤25 °C in unopened original packaging |
Q1: What is the primary function of DOWSIL SE 960 in silicone formulations?
A: DOWSIL SE 960 is a high-performance silicone elastomer designed to enhance surface softness, improve slip and abrasion resistance, and provide durable anti-blocking properties in cured silicone rubber systems—particularly in medical-grade and high-purity elastomer applications.
Q2: Is DOWSIL SE 960 compatible with both addition-cure and condensation-cure silicone systems?
A: Yes, DOWSIL SE 960 demonstrates broad compatibility with platinum-catalyzed (addition-cure) silicone elastomers and is also suitable for use in select tin-catalyzed (condensation-cure) systems, though formulation testing is recommended to confirm performance and cure kinetics.
Q3: How should DOWSIL SE 960 be incorporated into a silicone compound?
A: It is typically added during the mixing stage—either before or after base polymer incorporation—using standard high-shear mixers. For optimal dispersion, pre-mixing with a portion of the base polymer or diluting in a low-viscosity silicone fluid may be beneficial.
Q4: Does DOWSIL SE 960 affect the mechanical properties of the final cured elastomer?
A: When used at typical dosage levels, it maintains good retention of tensile strength and elongation while significantly improving surface characteristics. Excessive loading may reduce crosslink density, so optimization based on end-use requirements is advised.
Q5: Is DOWSIL SE 960 suitable for applications requiring biocompatibility or regulatory compliance?
A: DOWSIL SE 960 is formulated for use in healthcare and personal care applications where purity and inertness are critical. While it is not itself certified to ISO 10993 or USP Class VI, it is commonly selected in formulations intended for such evaluations—final compliance depends on the complete system and processing conditions.
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