Custom made FKM food grade soft silicone o ring

A soft silicone o ring can be developed for a joint that requires a compliant ring section, but softness needs to be considered with the groove and clearance around it. The ring must remain located while it makes the contact required by the assembly; choosing a softer material does not automatically improve every seal.

Silicone and FKM are distinct material families. Select the particular formulation for the medium, temperature and cleaning conditions, including the specific requirements of any food-contact application. The chosen compound should then be evaluated at the dimensions and hardness intended for production.

Fit the ring without twisting it or dragging it across a sharp edge. Check the full seating path before installing the opposing component. If the rubber moves into an unintended gap during assembly, inspect the geometry and compression conditions instead of simply reducing hardness again. During replacement, retain the specified material and section size so the new ring behaves within the joint configuration that was evaluated.

Material options

FKM / Silicone. Custom formulation and color for the intended contact conditions.

Hardness selection

Rubber: 30–90 Shore A. Silicone: 20–80 Shore A. A soft silicone o ring can be developed for a joint that requires a compliant ring section, but softness needs to be considered with the groove and clearance around it.

Custom dimensions

The chosen compound should then be evaluated at the dimensions and hardness intended for production.

Fit & assembly

Check the full seating path before installing the opposing component.

Use & inspection

If the rubber moves into an unintended gap during assembly, inspect the geometry and compression conditions instead of simply reducing hardness again.

Photos illustrate structure or material only. The ring must remain located while it makes the contact required by the assembly. ETOL directly manufactures custom-shaped silicone and rubber parts to your requirements.