70 Durometer FDA Grade Solid Silicone
70 Durometer FDA Grade Solid Silicone is an FDA grade solid silicone sheeting rated at 70 Shore A, designed for food contact applications requiring a firm, load-resistant sealing material with broad thermal capability. It maintains continuous service from -80°F to 450°F, with intermittent capability to 500°F, and passes FDA 21 CFR 177.2600.
Key Properties
- Durometer / Hardness (Shore A): 70 ±5 — ASTM D2240
- Tensile Strength: 900 psi — ASTM D412
- Elongation: 400% — ASTM D412
- Tear Strength: 110 ppi — ASTM D624, Die B
- Specific Gravity: 1.42 g/cc — ASTM D297
- Service Temperature Range: -80°F to 450°F continuous; 500°F intermittent
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- Specifications
- Applications
- General Info
- FAQs
Physical Properties
| Property | Value | Test Method |
| Material / Substrate | Solid Silicone | — |
| Color | White (other colors by special request) | — |
| Specific Gravity | 1.42 g/cc | ASTM D297 |
| Thickness | 1/32″, 1/16″, 3/32″, 1/8″, 3/16″, 1/4″, 1/2″ | — |
Mechanical Properties
| Property | Value | Test Method |
| Durometer / Hardness (Shore A) | 70 ±5 | ASTM D2240 |
| Tensile Strength | 900 psi | ASTM D412 |
| Elongation | 400% | ASTM D412 |
| Tear Strength | 110 ppi | ASTM D624, Die B |
Thermal Properties
| Property | Value | Test Method |
| Low-Temperature Resistance | -80°F | — |
| High Temperature Resistance | 450°F | — |
| High Intermittent Temperature | 500°F | — |
Environmental Performance
| Property | Value | Test Method |
| Ozone Resistance | Excellent | — |
| UV Resistance | Excellent | — |
Regulatory / Compliance Data
| Property | Value | Test Method |
| FDA 21 CFR 177.2600 | Pass | — |
Compliance
- FDA 21 CFR 177.2600 — Compliant (Pass)
- Food contact gaskets and seals in food processing and food service equipment requiring firm, load-resistant profiles
- Die-cut sealing components for FDA-regulated environments under sustained compressive load
- Insulators and separators in food-grade high-temperature processing equipment
- General-purpose firm seals and gaskets across a broad thermal service range
- UV- and ozone-exposed food-grade sealing applications
Common industries: Food processing, food service equipment, pharmaceutical, HVAC, general industrial.
70 Durometer FDA Grade Solid Silicone is a firm FDA grade solid silicone sheeting at 70 Shore A, providing meaningful resistance to deformation under compressive load in food contact sealing environments. With 900 psi tensile strength and 110 ppi tear resistance, this grade offers a mechanically robust profile suited for gaskets and seals in food processing equipment where sustained pressure or physical handling demands greater material stiffness. Compliance with FDA 21 CFR 177.2600 qualifies it for food contact use.
The material exhibits excellent UV and ozone resistance and functions as an effective electrical insulator. At 400% elongation, it retains sufficient flexibility for die-cut fabrication. Low compression set is cited as a key feature, supporting long-term sealing integrity under load.
Compliant with FDA 21 CFR 177.2600 — Pass.
What differentiates 70 Durometer FDA Grade Solid Silicone from softer and firmer FDA grades in this series?
70 Durometer FDA Grade Solid Silicone delivers the highest tear strength among the mid-to-firm FDA silicone grades at 110 ppi alongside a 70 Shore A durometer. This combination of firm hardness and strong tear resistance makes it well suited for food contact gaskets in equipment where sharp edges or high contact stress are present during installation or service.
Why is compression set an important consideration for solid silicone elastomers?
Compression set measures how well an elastomer recovers its original thickness after sustained compression. In sealing applications, a material with high compression set will permanently deform over time, reducing sealing force and allowing leak paths to develop. Low compression set is listed as a key feature of this material, indicating it is formulated to maintain sealing integrity over extended service periods.
What is the service temperature range for 70 Durometer FDA Grade Solid Silicone?
70 Durometer FDA Grade Solid Silicone is rated for continuous service from -80°F to 450°F, with a high intermittent temperature resistance of 500°F, as listed on the TDS.
Is 70 Durometer FDA Grade Solid Silicone suitable for food contact environments?
Yes. This material passes FDA 21 CFR 177.2600 and is specifically designed for food contact applications, as stated on the TDS
How should 70 Durometer FDA Grade Solid Silicone be specified?
Specify grade (70 Durometer FDA Grade Solid Silicone), thickness, color (white standard; other colors by special request), compliance requirements, dimensional tolerances, and finished format.
