AI - 666
Asbestos Beater Jointings (Grade : AI-666)
A low Density facing material with Nitrile Rubber Binder & processed Fibres. Suitable for combining with Perforated Metal sheets for Cylinder Head and Manifold Applications. A low cost alternative to grade AI-666 with some differences in properties.
| S.No. | Particular | – | AI-666 |
| 1 | Density (gms/cc) | – | 1.10 ± 0.05 |
| 2 | Tensile Strength (kg/cm²) | (Minimum) | 55 |
| 3 | Compressibility at 5000 psi/ 350 kg/cm² (%) | – | 25-40 |
| 4 | Recovery (%) | (Minimum) | 25 |
| 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) | 55 | |
| Thickness increase (%) | (Maximum) | 5 | |
| 7 | After immersion in ASTM Fuel B for 5 Hrs. | – | – |
| Weight increase (%) | (Maximum) | 45 | |
| Thickness increase (%) | (Maximum) | 5 | |
| 8 | Dimensions | – | – |
| Thickness Availablity | – | 0.40 mm – 1.50 mm | |
| Standard Size | Rolls of 1220 mm width, Length according to thickness. | ||
| 9 | ASTM Specification Compliance | F126160E51M4 |
Overview & Challenge
AI-666 Asbestos Beater Jointing (Grade AI-666) is a premium low-density gasket material manufactured from high-quality asbestos fibers combined with a Nitrile Rubber (NBR) binder and processed fillers.
It offers enhanced strength, sealing efficiency, and temperature resistance, making it ideal for cylinder head gaskets, exhaust manifolds, and other heavy-duty industrial applications.
Compared to AI-555, this grade provides superior tensile strength and durability, ensuring consistent performance in demanding environments where high compression and heat are present.
Why Choose AI-666?
AI-666 is the preferred grade for industries that demand reliable, high-strength asbestos jointing materials.
It combines flexibility with exceptional sealing properties, ensuring performance under tough operating conditions such as engine heads, manifolds, and industrial flange joints.