Effect on rubber seals
Bell Hammer Seven is a metal-surface reforming additive designed to improve lubrication and reduce friction in metallic wear areas.
It does not contain components that swell, soften, or restore rubber or resin materials.
Therefore, it does not have any direct effect on restoring seal performance or preventing oil leaks.
Compatibility with other additives
It can generally be used together with seal-improvement additives (rubber-swelling agents, etc.).
However, chemical interference between different additives may alter the base oil’s viscosity or reduce its performance.
If combining additives, follow these precautions:
・Start with a small amount to test compatibility.
・Monitor oil condition (color, viscosity), engine noise, and compression.
・If any irregularities occur, perform an oil change immediately.
Summary
・Bell Hammer Seven does not restore rubber seals or stop oil leaks.
・It can be combined with seal-restoring additives, but test in small amounts and monitor engine condition carefully.