Medium Strength Silicone
Medium Strength Silicone Sheets (30 to 80 Durometer)
- ESS30MS – 30 Durometer
- ESS35MS – 35 Durometer
- ESS40MS – 40 Durometer
- ESS50MS – 50 Durometer
- ESS60MS – 60 Durometer
- ESS70MS – 70 Durometer
- ESS80MS – 80 Durometer
Standard Sheet Sizes & Roll Dimensions
Commercial grade solid silicone sheet from ElastaPro is available in these sizes and roll dimensions.
Widths
- Standard: 36″ (914 mm) and 48″ (1219 mm)
- Custom: Up to 67″ (1701.8 mm) — among the widest available in the industry
Linear Lengths
- Continuous rolls up to 300+ yards depending on thickness
Thickness Range
- 0.005″ to 0.675″ (0.13 mm to 17.145 mm)
Cut Sheet Sizes
- 12″ × 12″
- 24″ × 24″
- 36″ × 36″
- 48″ × 48″
- Custom dimensions available
Medium Strength Silicone FAQs
What is medium-strength silicone rubber, and how does it compare to commercial-grade silicone?
Medium-strength silicone is a specialized formulation of solid silicone rubber engineered to provide higher physical endurance than commercial or general-purpose (GP) grades. While standard commercial silicone typically offers a tensile strength of 500 to 700 PSI, medium-strength silicone achieves 800 to 1,000+ PSI tensile strength along with significantly higher tear resistance. This prevents gaskets from tearing at bolt holes, cutouts, or sharp corners during installation and bolt-load compression.
What are the key performance benefits of medium-strength silicone sheeting?
Medium-strength silicone bridges the gap between commercial and high-strength grades by providing:
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Elevated Tear & Tensile Strength: Prevents tear propagation during die-cutting, stamping, and mechanical installation.
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Superior Compression Set Resistance: Maintains a tight environmental seal over long-term thermal cycling without losing elastic memory.
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Wide Thermal Operating Range: Operates continuously from −65°F to +450°F (−54°C to +232°C), with intermittent heat exposure up to +500°F (+260°C).
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Weathering & UV Resistance: Completely impervious to outdoor weathering, sunlight, UV radiation, and atmospheric ozone.
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FDA Compliance Options: Available in formulations compliant with FDA 21 CFR 177.2600 for repeated food and beverage contact.
What common industrial applications specify medium-strength silicone rubber?
Because it balances flexibility with physical toughness, medium-strength silicone is widely specified for:
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Industrial Enclosures: NEMA outdoor electrical cabinets, junction boxes, and HVAC access panels.
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Automotive & Transportation: Engine compartment seals, weatherproofing gaskets, and vibration-damping pads.
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Food & Beverage Processing: FDA-compliant hopper seals, conveyor belting strips, and sanitary gaskets.
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Electronics & Aerospace: Environmental dust seals, thermal isolation barriers, and protective cushioning pads.
Is medium-strength silicone suitable for custom die-cutting and fabrication?
Yes. Medium-strength silicone is specifically engineered for converting methods including steel-rule die-cutting, flash cutting, and waterjet cutting. Its elevated tear resistance yields clean cutout edges and structural stability, ensuring intricate gasket geometries do not rip under strain or torque during final assembly.
Can medium-strength silicone sheeting be supplied with an adhesive backing (PSA)?
Yes. Medium-strength silicone sheeting can be supplied in continuous rolls or press-cured sheets with factory-applied pressure-sensitive adhesive (PSA) backings—including high-tack acrylic or silicone-based adhesives—for fast peel-and-stick positioning.
Is medium-strength silicone available in FDA-compliant grades?
Yes. Specific medium-strength silicone formulations are manufactured using ingredients compliant with FDA 21 CFR 177.2600, making them safe and non-toxic for sanitary sealing and repeatable food, beverage, and drug processing applications.
