Medium Strength Silicone Sheeting & Uncured Compounds
Medium Strength Silicone Sheets: Made in USA
Medium strength silicone sheeting from ElastaPro deliver an optimal balance of durability, tear resistance, and mechanical flexibility. Engineered to bridge the performance gap between general-purpose and high-strength grades, this commercial-grade silicone provides reliable tensile strength, low compression set, and continuous thermal stability from −80°F to +450°F (−62°C to +232°C).
It is a cost-effective choice for die-cut industrial gaskets, enclosure seals, thermal insulation pads, and vibration-damping components. Every batch is Made in USA under ElastaPro’s ISO 9001:2015 / AS9100D quality system and shipped with a complete Certificate of Analysis (COA)
Need Medium Strength Silicone Sheeting or Rolls?
We supply continuous rolls, pre-cut sheets, and uncured compounds with low minimums and fast lead times.
Request a Quote (RFQ)Medium Strength Silicone Sheets (30 to 80 Durometer)
Choose from these durometers (Shore A).
Standard Sheet Sizes & Roll Dimensions
Solid silicone sheet from ElastaPro is available in these sizes and roll dimensions.
| Measurement | Type | Imperial | Metric |
|---|---|---|---|
| Width | Standard | 36" | 914 mm |
| Width | Standard | 48" | 1219 mm |
| Width | Custom | Up to 67" | Up to 1701.8 mm |
| Thickness | Range | 0.020" to 0.375" | 0.508 mm to 9.525 mm |
| Cut Sheet | Standard | 12″ × 12" | 30.48 cm x 30.48 cm |
| Cut Sheet | Standard | 24″ × 24″ | 60.96 cm x 60.96 cm |
| Cut Sheet | Standard | 36″ × 36″ | 91.44 cm x 91.44 cm |
| Cut Sheet | Standard | 48" x 48" | 121.92 cm x 121.92 cm |
| Cut Sheet | Custom | — | — |
| Linear Length | Continuous | Up to 300" ft | Up to 91.44 m |
Medium Strength vs. High Strength Silicone
Medium-strength silicone sheeting typically offers a tensile strength ranging from roughly 600 to 900 PSI, making it a reliable, general-purpose material for standard industrial gasketing, sealing, and insulation applications that face moderate physical stress.
In contrast, high-strength silicone sheeting delivers significantly higher tensile strength—often reaching 1,200 to 1,500+ PSI or more—along with vastly superior tear resistance, durometer stability under flexure, and elongation capabilities.
While medium-strength grades excel in static applications where extreme mechanical forces are absent, high-strength silicone is engineered for demanding dynamic environments, high-stress mechanical seals, and repeated flexing where ordinary silicone would tear, crack, or suffer premature failure.
Medium Strength Silicone Sheeting 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 this material?
Medium-strength silicone bridges the gap between commercial and high-strength grades by providing:
Elevated Tear & Tensile Strength: Prevents tear propagation during die-cutting, stamping, and mechanical installation.
Superior Compression Set Resistance: Maintains a tight environmental seal over long-term thermal cycling without losing elastic memory.
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).
Weathering & UV Resistance: Completely impervious to outdoor weathering, sunlight, UV radiation, and atmospheric ozone.
FDA Compliance Options: Available in formulations compliant with FDA 21 CFR 177.2600 for repeated food and beverage contact.
Where is this material commonly used?
Because it balances flexibility with physical toughness, medium-strength silicone is widely specified for:
Industrial Enclosures: NEMA outdoor electrical cabinets, junction boxes, and HVAC access panels.
Automotive & Transportation: Engine compartment seals, weatherproofing gaskets, and vibration-damping pads.
Food & Beverage Processing: FDA-compliant hopper seals, conveyor belting strips, and sanitary gaskets.
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 this material 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.