Blast® 139 Natural Rubber
Blast® 139 Natural Rubber is a 40 Shore A natural rubber sheeting with high tear resistance and self-healing qualities, designed for positioning between targets and bullet traps or on the walls of shooting ranges. It delivers 2000 min. psi tensile strength and 400% min. elongation with a compression set of 50% max. (22 hours @ 158°F). The material is rated for service from -20°F to 180°F and is available in four colors.
Key Properties
- Durometer / Hardness (Shore A): 40 — ASTM D2240
- Tensile Strength: 2000 min. psi — ASTM D412
- Elongation: 400% min. — ASTM D412
- Compression Set, 22 Hours @ 158°F: 50% max. — ASTM D395B
- Specific Gravity: 1.14 gr/cc — —
- Temperature Range: -20°F to 180°F
We want to help!
Enter your information and we'll get you in touch with our knowledgable staff. We know how important to the right product for your project.
Request a Consultation
- Specifications
- Applications
- General Info
- FAQs
Physical Properties
| Property | Value | Test Method |
| Material / Substrate | Natural Rubber | — |
| Color | Black, Beige, Red & White | — |
| Specific Gravity | 1.14 gr/cc | — |
| Thickness | 1/8″, 1/4″, 3/8″ | — |
Mechanical Properties
| Property | Value | Test Method |
| Durometer / Hardness (Shore A) | 40 | ASTM D2240 |
| Tensile Strength | 2000 min. psi | ASTM D412 |
| Elongation | 400% min. | ASTM D412 |
| Compression Set, 22 Hours @ 158°F | 50% max. | ASTM D395B |
Thermal Properties
| Property | Value | Test Method |
| Cold Temperature | -40°F | ASTM D2137 |
| Temperature Range | -20°F to 180°F | — |
Aging Performance — Heat Aging (70 Hours @ 158°F)
| Property | Value | Test Method |
| Durometer / Hardness Change | ±15 | ASTM 573 |
| Tensile Change | ±30% max | ASTM 573 |
| Elongation Change | -50% max | ASTM 573 |
- Rubber curtains positioned between targets and bullet traps in indoor and outdoor shooting ranges
- Wall coverings and ballistic containment panels in shooting range facilities
- Bullet trip bin covers requiring self-healing, high-tear-resistance natural rubber
- Ballistic impact surfaces where long service life and self-healing performance reduce replacement frequency
- Safety panel and barrier applications in shooting range environments requiring multi-color availability
Common industries: Shooting range construction and equipment, law enforcement training facilities, military range infrastructure, recreational shooting.
Blast® 139 Natural Rubber is a high-performance natural rubber sheeting engineered specifically for shooting range and ballistic containment applications. Its defining characteristic is a self-healing quality — bullet holes and tears close back together after penetration — which dramatically extends service life compared to conventional materials and provides a safer, cleaner shooting environment.
Combined with high tear resistance at 40 Shore A and 400% min. elongation, this material is well suited for rubber curtains positioned between targets and bullet traps, wall coverings in shooting ranges, and bullet trip bin covers. It is available in four standard colors — Black, Beige, Red, and White — to accommodate range design and safety marking requirements.
The material provides 2000 min. psi tensile strength and a cold temperature rating of -40°F per ASTM D2137. Heat aging at 158°F for 70 hours yields hardness change of ±15, tensile change of ±30% max., and elongation change of -50% max. per ASTM 573.
What differentiates Blast® 139 Natural Rubber from standard natural rubber sheeting?
Blast® 139 Natural Rubber is specifically engineered for ballistic applications, with self-healing qualities that cause bullet holes and tears to close back together after penetration. This property — combined with high tear resistance at 40 Shore A and 400% min. elongation — provides a longer-lasting, cost-effective alternative to conventional range materials that must be replaced after repeated penetration. It is available in four colors to support range design and safety marking requirements.
Why is compression set an important consideration for natural rubber sheeting in ballistic applications?
Compression set measures how well an elastomer recovers its original thickness after sustained compression. In shooting range curtain and barrier applications, a material with high compression set will permanently deform under sustained tensile or compressive load, reducing its ability to self-heal after bullet penetration and maintain its protective function over time. Blast® 139 is rated at 50% max. compression set (22 hours @ 158°F per ASTM D395B), appropriate for natural rubber applications operating within the stated temperature range.
What is the temperature range for Blast® 139 Natural Rubber?
Blast® 139 Natural Rubber is rated for service from -20°F to 180°F, with a cold temperature rating of -40°F per ASTM D2137, as listed on the TDS.
Is Blast® 139 Natural Rubber suitable for professional and regulated shooting range environments?
The TDS does not cite specific compliance standards for this material. It is designed and marketed for shooting range applications — rubber curtains, wall coverings, and bullet trip bin covers — and its self-healing, high-tear-resistance properties support safe, long-lasting performance in those environments. End-users should verify any facility-specific compliance requirements independently.
How should Blast® 139 Natural Rubber be specified?
Specify grade (Blast® 139 Natural Rubber), thickness, color (Black, Beige, Red, or White), dimensional tolerances, and finished format.
