Recently, the Aluda Fluorosilicone (ALUDA FVMQ) has completed full performance testing and verification in the private laboratory of a Russian customer. The tests covered key indicators such as material basic physical properties, heat aging resistance, oil resistance, coolant resistance, and fuel resistance, and multiple batches of repeated tests were conducted. 

I. Test Background 

Fluorosilicone (FVMQ) combines the chemical resistance of fluororubber with the low-temperature resistance of silicone rubber. It is widely used in fuel systems, turbocharger pipes, exhaust valve diaphragms, and other high-temperature oil medium sealing components in automotive, aerospace and other fields. To ensure that the material meets the strict requirements of the international market, Russian customers independently tested the Adula fluorosilicone brand at their own laboratories. 

II. Testing Methods and Standards 

Test material: Aluda fluorosilicone (hardness 70 Shore A grade) 

Sample type: Same formula, two separate batches 

Sulfurization process: First stage sulfurization: 170°C for 15 minutes (test sheet) / 20 minutes (test tube, test ring); Second stage sulfurization: 200°C for 4 hours 

Test basis: ASTM and relevant Russian standards 

Core test items: 

Basic physical properties (hardness, tensile strength, elongation at break, tear strength, compressive permanent deformation) 

Heat resistance aging (150°C × 72 hours, in air) 

Resistant to engine oil (SAE 15W-40, 125°C × 72 hours) 

Resistant to coolant (Tosol A-40, 105°C × 72 hours) 

Gasoline-resistant (AI-92, 23°C × 24 hours) 

Low-temperature resistance (compression elastic recovery coefficient at -60°C, brittle temperature) 

III. Test Results 

Basic physical properties 

Indicator          Required Range  Batch 1  Batch 2  Result 

Hardness: Shore A 70 ± 10/-5  75  73  Pass 

Tensile strength, MPa  6–12  10.80  9.82  Qualified 

Tensile elongation, %  200–500  269  276  Qualified 

Tear strength, N/mm  15–28  37.2  35.9  Qualified (better than upper limit) 

Permanent deformation after compression (150°C × 24 hours, 25% compression) % ≤ 15  4.3     4.8   Qualified (significantly superior) 

Density, kg/m³  1410–1550  1462  1487  Qualified 

2. Heat resistance aging (150°C × 72 hours, in air) 

Indicator  Required Range  Batch 1  Batch 2  Result 

Hardness variation, Shore A: 0 to +3, 0 to +1, qualified. 

Stress strain rate change, %  ≤ ±5  +0.9  -1.7  Qualified 

3. Resistant to engine oil (SAE 15W-40, 125°C × 72 hours) 

Indicator  Required Range  Batch 1  Batch 2  Result 

Hardness variation, Shore A  0 to -5  -1  -1  Qualified 

Volume change rate, %  0 to +5  0.48   0.56  Qualified 

Compression permanent deformation (30% compression), %  ≤ 30  16.2  15.9  Qualified 

4. Resistant to coolant (Tosol A-40, 105°C × 72 hours) 

Indicator  Required Range  Batch 1  Batch 2  Result 

Hardness variation, Shore A: 0 to -5, -2, -2 - Qualified 

Volume change rate, %  -2 to +3  0.71   0.65  Qualified 

Compression permanent deformation (30% compression), %  ≤ 40  15.2  20.7  Pass 

5. Resistant to gasoline (AI-92, 23°C × 24 hours) 

Indicator  Required Range  Batch 1  Batch 2  Result 

Hardness variation, Shore A: -10, -9, -8. Pass. 

Volume change rate, %  0 to +20  18.0  18.2  Qualified 

Rate of quality change, %  —  9.0  9.0  Stable 

6. Low-temperature resistance performance 

Indicator    Measured Value    Requirement    Result 

-60°C compression elastic recovery coefficient  0.11  ≥ 0.11  Qualified 

Brittleness temperature           -60°C  -60°C  Pass 

IV. Batch Stability 

Two independent batches of the same formula were subjected to parallel tests. There were extremely small differences in all key indicators between the two batches, and the core data such as compression permanent deformation, volume change rate, and quality change rate were highly consistent, which proved the batch stability of the Aludara fluorosilicone material formula. 

V. Conclusion 

Based on the test report from the Russian customer's own laboratory: 

Adulafosil rubber passed all the tests with 100% success rate. 

The compression permanent deformation (4.3–4.8%) is significantly better than the upper limit of 15%. 

The tear strength (35.9–37.2 N/mm) exceeds the specification limit of 15–28 N/mm. 

The products have fully met the standards for heat resistance aging, resistance to engine oil, resistance to coolant, resistance to fuel, and low-temperature resistance. 

The two batches of data are highly consistent and have good stability. 

This brand can meet the performance requirements for sealing components in high-temperature oil media such as those in the engine compartment, fuel system, turbocharger piping, and exhaust gas recovery system of automobiles. 

VI. Regarding Aludra 

Aluida is a specialized manufacturer of special rubber materials such as fluororubber (FKM), fluorosilicone (FVMQ), and hydrogenated nitrile (HNBR). Based on real application scenarios and third-party test data, it provides customers with verifiable and traceable alternative and customized solutions. 

Note: All the data in this article are based on the test reports from the Russian customer's own laboratory. The original reports are archived for future reference. The actual application results may vary depending on the specific working conditions. It is recommended to conduct targeted verification.