AI - 888
Asbestos Beater Jointings (Grade : AI-888)
AI-888 is a high-density asbestos beater jointing sheet manufactured using premium-grade chrysotile fibres blended with selected fillers and a heat-resistant binder system. This grade is specially developed for demanding applications requiring high mechanical strength, reliable sealing performance, and stability under variable pressure and temperature conditions.
| S.No. | Particular | – | AI-888 |
| 1 | Density (gms/cc) | – | 1.20 ± 0.05 |
| 2 | Tensile Strength (kg/cm²) | (Minimum) | 65 |
| 3 | Compressibility at 5000 psi/ 350 kg/cm² (%) | – | 20-30 |
| 4 | Recovery (%) | (Minimum) | 30 |
| 5 | Loss on Ignition at 800 °C(%) | (Maximum) | 40 |
| 6 | After immersion in ASTM Oil No. 3 for 5 Hrs. @ 150 °C | – | – |
| Weight increase (%) | (Maximum) | 50 | |
| Thickness increase (%) | (Maximum) | 10 | |
| 7 | After immersion in ASTM Fuel B for 5 Hrs. | – | – |
| Weight increase (%)td> | (Maximum) | 40 | |
| Thickness increase (%) | (Maximum) | 10 | |
| 8 | After immersion in water. | – | – |
| Weight increase (%) | (Maximum) | 40 | |
| Thickness increase (%) | (Maximum) | 10 | |
| 9 | Dimensions | – | – |
| Thickness Availablity | – | 0.40 mm – 1.50 mm | |
| Standard Size | Rolls of 1220 mm width, Length according to thickness. | ||
| 10 | ASTM Specification Compliance | F125160E51M4 |
Overview & Challenge
AI-888 provides excellent resistance to oils, fuels, and water, making it suitable for a wide range of industrial sealing applications. Its balanced compressibility and recovery ensure long-term sealing effectiveness, even under vibration and thermal cycling.
It is recommended for use in gaskets and joints for steam, oils, fuels, and general engineering services where higher sealing efficiency and durability are required.
Why Choose AI-888?
AI-888 offers a balanced combination of performance, affordability, and reliability.
It is especially suited for OEM and maintenance applications where standard sealing is required without the added cost of high-density or premium-grade jointing materials.