Product Overview
90 Durometer Commercial Grade Solid Silicone — Technical Overview & FAQs
Product Overview
90 Durometer Commercial Grade Solid Silicone Rubber is an extremely firm, high-strength silicone elastomer engineered for applications requiring maximum rigidity, minimal deflection, and exceptional mechanical stability.
At 90 Shore A, this is one of the firmest silicone rubber grades available, offering near-plastic rigidity while maintaining silicone’s hallmark benefits—broad temperature resistance, chemical stability, UV/ozone durability, and long-term resilience.
This ultra-firm silicone is ideal for high-load compression seals, structural interface components, vibration isolation pads, mechanical supports, and industrial or aerospace assemblies requiring very low compression and high mechanical strength.
Applications
Ultra-firm, high-pressure industrial gaskets
Load-bearing silicone components
Structural interface pads and mechanical supports
High-stress transportation and aerospace sealing
Equipment mounting and anti-vibration isolators
Electrical enclosure and equipment housing barriers
Heavy-duty die-cut and machined silicone parts
Key Properties
Durometer: 90 Shore A (ultra-firm silicone grade)
Mechanical Strength: Very high tensile and tear resistance
Compression Resistance: Maximum load support with minimal deflection
Elongation: Lower than softer grades but maintains controlled flexibility
Temperature Range: –80 °F to +450 °F (–62 °C to +232 °C)
Environmental Resistance: Excellent resistance to UV, ozone, humidity, and outdoor exposure
Chemical Resistance: Good resistance to oils, solvents, and oxidation
Electrical: Reliable dielectric insulation properties
Formats Available: Sheets, rolls, strips, extrusions, die-cut parts, PSA-backed
Compliance: RoHS | REACH
FAQs
What is 90 Durometer Solid Silicone used for?
It is used for high-pressure sealing, load-bearing components, rigid gasket interfaces, and mechanically demanding industrial applications where maximum firmness is required.
How firm is 90 durometer silicone?
90A silicone is extremely firm, providing:
Minimal compression under high loads
Near-plastic rigidity
Maximum dimensional stability
Superior mechanical durability
It is the firmest commonly used commercial silicone grade.
Is 90 durometer silicone suitable for outdoor use?
Yes. Silicone provides exceptional UV, ozone, and weather resistance, ensuring reliability in harsh and long-term outdoor environments.
Can 90 durometer silicone withstand high temperatures?
Absolutely. It performs reliably from –80 °F to +450 °F, making it suitable for high-heat industrial, automotive, aerospace, and electrical applications.
Can this material be die-cut, machined, or PSA-backed?
Yes — H-O Products manufactures die-cut gaskets, machined silicone parts, PSA-backed seals, strips, and custom-engineered ultra-firm silicone components for OEM use.
Contact H-O Products for 90 Durometer Commercial Grade Solid Silicone samples, application engineering support, or custom-fabricated sealing solutions - contact us.
