Custom heat resistant round flat rubber sealing gaskets

Round flat rubber sealing gaskets sit between mating surfaces where controlled compression forms the sealing interface. The inner diameter, outer diameter and thickness all influence how the gasket is supported. A ring that extends beyond the available bearing surface can be squeezed unevenly when the joint is closed.

For a warm application, choose the compound using the local temperature and exposure duration together with the medium being contained. Custom materials and dimensions allow the gasket to be matched to the joint, but the complete assembly must establish its operating capability.

Check the flatness and cleanliness of both mating surfaces before installation. Follow the intended closing or fastening sequence so the gasket is not dragged out of position while one area is compressed first. After representative operation and cooling, inspect for extrusion or a strongly uneven contact imprint. These signs may indicate a problem with joint support or closing force rather than gasket thickness alone. Store replacement rings flat and protected from sharp edges so their sealing faces remain suitable for assembly.

Material options

Rubber. Custom formulation and color for the intended contact conditions.

Hardness selection

Rubber: 30–90 Shore A. Follow the intended closing or fastening sequence so the gasket is not dragged out of position while one area is compressed first.

Custom dimensions

The inner diameter, outer diameter and thickness all influence how the gasket is supported.

Fit & assembly

Check the flatness and cleanliness of both mating surfaces before installation.

Use & inspection

Store replacement rings flat and protected from sharp edges so their sealing faces remain suitable for assembly.

Photos illustrate structure or material only. The inner diameter, outer diameter and thickness all influence how the gasket is supported. ETOL directly manufactures custom-shaped silicone and rubber parts to your requirements.