Neoprene AMS 3208
Neoprene AMS 3208 Weather Resistant is a 50 Shore A durometer chloroprene (CR) sheet rubber engineered specifically to meet the SAE AMS 3208 aerospace material specification. Optimized for superior weather and ozone resistance, supporting reliable performance in outdoor and weather-exposed applications. Tensile strength is 1,200 psi typical with 300% ultimate elongation typical. Continuous service from −30°F to +220°F. Available in thicknesses from 1/64″ to 1/2″, with 36″ or 48″ standard widths (custom widths up to 55″). Standard color is black; smooth finish is standard with textured (fabric) and matte finishes available. Made in the USA. Talc present.
Key Properties
- Durometer Hardness: 50 Shore A (±5)
- Tensile Strength (Typical): 1,200 psi
- Ultimate Elongation (Typical): 300%
- Temperature Range: −30°F to +220°F
- Compliance: SAE AMS 3208
- Thickness Range: 1/64″ to 1/2″
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Mechanical Properties
| Property | Value | Test Method |
| Durometer Hardness (Shore A ±5) | 50 | — |
| Tensile Strength (Typical) | 1,200 psi | — |
| Ultimate Elongation (Typical) | 300% | — |
Thermal Properties
| Property | Value | Test Method |
| Temperature Range | −30°F to +220°F | — |
Physical Properties
| Property | Value | Test Method |
| Material / Substrate | Chloroprene (CR) — Neoprene | — |
| Thickness Range | 1/64″ – 1/4″ (extended thicknesses to 1/2″ available) | — |
| Width | 36″ or 48″ standard (custom widths up to 55″; untrimmed rolls measure approximately 3″ wider) | — |
| Standard Color | Black (custom colors and color matching available) | — |
| Standard Finish | Smooth (textured / fabric and matte finishes available on most materials) | — |
| Surface Treatment | Talc present | — |
| Country of Origin | Made in the USA | — |
| Estimated Weight (1/8″ × 36″ per linear foot) | 2.51 lb | — |
Standard Roll Lengths (Approximate ±10%)
| Thickness | Standard Roll Length |
| 1/64″ | 180 feet |
| 1/32″ | 150 feet |
| 1/16″ | 100 feet |
| 3/32″ | 65 feet |
| 1/8″ | 50 feet |
| 3/16″ | 30 feet |
| 1/4″ | 25 feet |
| 5/16″ | 20 feet |
| 3/8″ | 16.5 feet |
| 1/2″ | 12.5 feet |
Sheet Rubber Thickness Tolerances — Standard RMA
| Thickness Range | Tolerance |
| 0.031″ & thinner | ±0.010″ |
| 0.032″ to 0.061″ | ±0.012″ |
| 0.062″ to 0.124″ | ±0.016″ |
| 0.125″ to 0.186″ | ±0.020″ |
| 0.187″ to 0.374″ | ±0.031″ |
| 0.375″ to 0.500″ | ±0.047″ |
| 0.501″ to 0.750″ | ±0.094″ |
| 0.751″ & thicker | ±10% |
Physicals presented are typical values — H-O certifies to the minimum value. Closer tolerances and custom thicknesses are available and can be priced on request. Test reports including short-form test results and basic physicals are available upon request at the time of order. Certifications are sent with your order upon request at no charge.
Compliance
- SAE AMS 3208 (Aerospace Material Specification — Chloroprene Sheet Rubber, Weather Resistant) — Compliant
- Aerospace and automotive sealing applications requiring SAE AMS 3208 compliance and weather/ozone exposure resistance
- Outdoor weather-exposed gasketing where long-term ozone resistance is required
- Sheet rubber fabrication into custom weather-resistant gaskets, seals, and converted parts
- Industrial sealing applications subject to outdoor or weather-exposed service
- Weather-resistant pads and barrier components for exterior installations
Common industries: Aerospace, automotive, outdoor industrial sealing, building envelope, weather barrier fabrication, gasket converting.
Neoprene AMS 3208 Weather Resistant is a chloroprene (CR) elastomer sheet rubber product engineered specifically to meet the SAE AMS 3208 aerospace material specification — a published industry standard for chloroprene sheet rubber optimized for weather and ozone resistance.
The defining performance characteristic that distinguishes this grade from general-purpose neoprene and from the companion AMS 3205 Low Temperature variant is superior weather and ozone resistance, supporting reliable long-term performance in outdoor and weather-exposed sealing applications including aerospace external surfaces, automotive exterior gasketing, and weather barrier components.
Mechanical properties at the 50 Shore A durometer (±5 tolerance) include 1,200 psi tensile strength typical and 300% ultimate elongation typical — the trade-off for weather optimization is somewhat lower tensile and elongation than the AMS 3205 Low Temperature variant (1,600 psi / 400%), reflecting different formulation priorities for weather/ozone resistance versus low-temperature flexibility. Continuous service temperature spans −30°F to +220°F.
The product is supplied as standard sheet rubber roll stock in thicknesses from 1/64″ to 1/2″, with standard roll widths of 36″ or 48″ (untrimmed rolls measure approximately 3″ wider; trimmed roll rubber available on request; custom widths to 55″ available). Standard color is black; custom colors and color matching are available. Standard finish is smooth, with textured (fabric) and matte finishes available at additional cost on most materials.
Talc is present on the rubber surface as a typical anti-block treatment.
The TDS publishes detailed standard roll lengths by thickness (180 ft for 1/64″ down to 12.5 ft for 1/2″, approximate ±10%) and Standard RMA thickness tolerances scaled to nominal thickness. Closer tolerances and custom thicknesses available on request. Test reports including short-form test results and basic physicals are available upon request at the time of order; certifications sent with order upon request at no charge. Physicals presented are typical values; H-O certifies to the minimum value. Made in the USA. Samples available upon request.
Compliant with SAE AMS 3208 (Aerospace Material Specification — Chloroprene Sheet Rubber, Weather Resistant).
What differentiates Neoprene AMS 3208 from AMS 3205 and from general-purpose neoprene?
The two AMS-grade neoprenes are formulated for different priorities. AMS 3208 is optimized for superior weather and ozone resistance — the appropriate selection for outdoor and exterior applications. AMS 3205 is optimized for low-temperature service to −40°F (vs −30°F for AMS 3208), with higher tensile strength (1,600 vs 1,200 psi) and higher elongation (400% vs 300%) — but without the dedicated weather/ozone optimization. Both meet their respective SAE AMS specifications. General-purpose neoprene typically meets neither specification.
Why is durometer selection important when specifying AMS 3208?
The 50 Shore A durometer is a balanced mid-range hardness suitable for general sheet rubber applications — soft enough for conformable sealing, firm enough for dimensional stability in gaskets and converted parts. The ±5 Shore A tolerance is consistent with industry practice for sheet rubber and supports predictable sealing-pressure performance across production lots.
What is the operating temperature range for AMS 3208?
Neoprene AMS 3208 has a temperature range of −30°F to +220°F.
Is AMS 3208 suitable for aerospace, outdoor, or regulated industrial applications?
Yes. The product is engineered specifically to meet the SAE AMS 3208 aerospace material specification — a formal industry standard for chloroprene sheet rubber optimized for weather and ozone resistance. Test reports and certifications are available with order at no charge upon request, supporting documentation requirements for aerospace and regulated industrial supply.
How should AMS 3208 be specified?
Specify product (Neoprene AMS 3208 Weather Resistant), thickness (1/64" through 1/2", or custom), width (36" / 48" / custom up to 55"), trimmed or untrimmed roll, finish (smooth / textured / matte), color (black or custom), tolerance class (standard RMA or closer custom tolerance), compliance requirement (SAE AMS 3208), and certification request if needed.
