Rubberized Cork BC351-207
Rubberized Cork BC351-207 is a natural cork and polymeric rubber composite sheeting (Cork Grade BC351, granule size 0.5–1 mm) providing a tough, high-wear material with excellent compression resistance and a high coefficient of friction. It delivers 110 psi min. tensile strength, compressibility of 20%–40% @ 400 PSI, and 70% min. recovery per ASTM F36, with a minimum density of 30 lb/ft³ per ASTM F1315. It is suited for gaskets, bumpers, shims, anti-skid applications, and glass wall assemblies.
Key Properties
- Compressibility @ 400 PSI: 20% – 40% — ASTM F36
- Recovery: 70% min — ASTM F36
- Tensile Strength: 110 psi min. — ASTM F152
- Density: 30 lb/ft³ min. — ASTM F1315
- Flexibility, Initial (F=5): No cracks — ASTM F147
Cork Granule Size: 0.5 – 1 mm — —
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- Specifications
- Applications
- General Info
- FAQs
Physical Properties
| Property | Value | Test Method |
| Material / Substrate | Rubberized Cork | — |
| Color | Natural/Black (Mixed) | — |
| Binder | Polymeric | — |
| Cork Grade | BC351 (207) | — |
| Cork Granule Size | 0.5 – 1 mm | — |
| Density | 30 lb/ft³ min. | ASTM F1315 |
| Thickness | 1/32″, 1/16″, 3/32″, 1/8″, 3/16″, 1/4″ | — |
Mechanical Properties
| Property | Value | Test Method |
| Tensile Strength | 110 psi min. | ASTM F152 |
| Compressibility @ 400 PSI | 20% – 40% | ASTM F36 |
| Recovery | 70% min | ASTM F36 |
| Flexibility, Initial (F=5) | No cracks | ASTM F147 |
Aging Performance — Fluid Immersion (ASTM F146)
| Property | Value | Test Method |
| Volume Change After Aging, ASTM #1, 70 Hours @ 100°C | -5% to 15% | ASTM F146 |
| Volume Change After Aging, Fuel A, 22 Hours @ RT | -5% to 15% | ASTM F146 |
| Volume Change After Aging, IRM 903, 70 Hours @ 100°C | +15% to 50% | ASTM F146 |
- Anti-skid gaskets and protective pads for glass wall assemblies requiring high coefficient of friction
- Awning operator gaskets and related architectural hardware sealing applications
- Bumpers and shims in industrial and construction assemblies requiring tough, compression-resistant cork composite
- Ruler backing and precision instrument surface protection requiring non-scratch, high-grip cork sheeting
- General-purpose gaskets in applications with exposure to petroleum-based oils and fuels
Common industries: Construction / architectural glazing, industrial equipment, precision instruments, window and door hardware, general manufacturing.
Rubberized Cork BC351-207 is a cork composite sheeting combining natural cork granules (0.5–1 mm) with a polymeric rubber binder to produce a tougher, higher-wear material than plain cork sheeting.
The addition of rubber binder increases resistance to compression, improves physical durability, and raises the coefficient of friction, making this grade well suited for anti-skid gaskets, awning operator gaskets, bumpers, shims, ruler backing, and glass wall applications where the material must maintain its geometry under higher compressive loads than plain cork can sustain.
Its compressibility is rated at 20%–40% @ 400 PSI — a substantially higher test load than plain cork grades — reflecting the firmer, more compression-resistant compound.
The material passes initial flexibility testing at F=5 with no cracks per ASTM F147. Fluid aging performance per ASTM F146 shows volume change of -5% to 15% after exposure to ASTM #1 oil (70 hours @ 100°C) and Fuel A (22 hours @ RT), and +15% to 50% after IRM 903 oil immersion (70 hours @ 100°C). Other cork grades are available by special request; longer lead times and minimum orders will apply.
What differentiates Rubberized Cork BC351-207 from Plain Cork MS113?
Rubberized Cork BC351-207 combines natural cork granules with a polymeric rubber binder, producing a significantly tougher and more wear-resistant material than plain cork. Its compressibility is rated at 400 PSI (vs. 100 PSI for plain cork), reflecting a firmer compound with greater resistance to compression under load. It also provides a higher coefficient of friction and includes fluid aging performance data for petroleum oils and fuel, making it appropriate for gaskets, bumpers, and anti-skid applications where plain cork would be too soft or too fragile. The cork granule size (0.5–1 mm) is also coarser than plain cork MS113 (0.5 mm), contributing to its tougher profile.
Why is compressibility an important property for rubberized cork gasket applications?
Compressibility determines how much the cork composite will deflect under a given seating load, which governs how well the gasket conforms to mating surfaces to create a seal. A material that is too stiff will not seal against surface imperfections; one that is too compliant will bottom out and extrude from the joint. Rubberized Cork BC351-207 achieves 20%–40% compressibility @ 400 PSI per ASTM F36, providing a controlled deflection range suited for higher-load gasketing applications such as awning operators and anti-skid structural pads, where the firmer rubberized compound outperforms plain cork grades.
How does Rubberized Cork BC351-207 perform in fluid exposure environments?
Fluid aging data per ASTM F146 shows volume change of -5% to 15% after ASTM #1 oil immersion (70 hours @ 100°C) and -5% to 15% after Fuel A exposure (22 hours @ RT), indicating limited swelling in light mineral oil and fuel environments. Volume change after IRM 903 oil immersion (70 hours @ 100°C) is +15% to 50%, indicating more significant swelling in severe oil environments — a factor to evaluate when selecting this material for continuous heavy oil contact applications.
Is Rubberized Cork BC351-207 suitable for industrial gasketing environments?
Yes. The material is designed for gaskets, bumpers, shims, and anti-skid applications and provides a high coefficient of friction with tough, high-wear performance. It demonstrates controlled fluid resistance to ASTM #1 oil and Fuel A per ASTM F146. No specific compliance standards are cited on the TDS.
How should Rubberized Cork BC351-207 be specified?
Specify grade (Rubberized Cork BC351-207), thickness, dimensional tolerances, and finished format. Note that other cork grades are available by special request with longer lead times and minimum order requirements.
