| Indicators | Standard | Sample number | Reference | 1 | 2 | 3 | 4 |
| Nominal strength (MPa) (kg(f)/cm2) | At least 7,0 (71,4) | 8,26 | 8,43 | 8,04 | 7,88 | 8,39 | Relative elongation (%) | At least 250 | 287 | 297 | 283 | 280 | 300 | Residual elongation (%) | No more than 20 | 11 | 9 | 14 | 13 | 10 | Shore hardness (nominal units) | 58-73 | 63 | 64 | 69 | 71 | 64 | Nominal strength after thermal aging in air at a temperature of 90°C for 72 hours (MPa) (kg(f)/cm2) | | 6,53 | 6,62 | 6,29 | 6,23 | 6,61 | Change in nominal strength after thermal aging in air at a temperature of 90°C for 72 hours (%, not less) | Minus 25% | -20,9% | -21,5% | -21,8% | -20,9% | -21,2% | Elongation at break after thermal aging in air at 90°C for 72 hours (%) | | 227 | 233 | 223 | 220 | 237 | Change in elongation at break after thermal aging in air at a temperature of 90°C for 72 hours (%, not less) | Minus 30% | -20,9% | -21,5% | -21,2% | -21,4% | -21,0% |
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