Silicone O-Ring 20mm x 2.5mm for Engine Seals

Silicone O-Ring 20mm x 2.5mm for Engine Seals delivers unmatched durability and precision in high-stress environments. Engineered with premium-grade silicone, this o-ring resists extreme temperatures (-40°C to 250°C) and harsh chemicals like oil, coolant, and solvents—critical for preventing leaks in automotive engines or industrial machinery. Its exact dimensions (20mm inner diameter × 2.5mm thickness) ensure a snug fit in cylinder heads, valve covers, or hydraulic systems, reducing vibration-related wear and extending component lifespan.

Key Advantages vs. Standard Rubber O-Rings:
| Feature | Silicone O-Ring | Standard Rubber |
|————————-|—————-|—————–|
| Temperature Resistance | -40°C to 250°C | Up to 150°C |
| Chemical Resistance | Excellent | Moderate |
| Compression Set | <10% after 70hrs | >25% |
| Reusability | High | Low |

Perfect for mechanics tackling stubborn oil leaks or engineers designing heat-resistant systems, this o-ring eliminates costly downtime by maintaining airtight seals under pressure fluctuations. Certified ASTM D3457 and ISO 3601 standards ensure reliability for heavy-duty applications like motorcycle engines or agricultural equipment pistons.

Upgrade your sealing solution—choose precision-engineered silicone over generic alternatives to protect sensitive engine parts and reduce maintenance frequency.