Silicone Rubber Caps

Silicone Rubber Caps

Silicone rubber caps can mask selected areas during a surface-finishing process. The cap covers a projecting end or feature that must remain free of the finish. Its cavity, depth and sealing edge should match the part and the intended masking boundary.

For powder coating or e-coating, consider the full process cycle, including pretreatment, bath exposure and curing. Anodizing and abrasive blasting introduce different chemical or mechanical demands. Select the cap compound and construction for the actual process rather than assigning one temperature limit to every silicone cap.

When comparing cap inside diameters in the 1 mm to 47 mm range, also check wall thickness and usable depth. A diameter match alone does not establish retention during handling or removal after curing. Trial the selected cap on the component and inspect the masked boundary, cap condition and ease of removal before repeated use.

All dimensions are in mm​

Rubber Cap Size Catalog

Compare the internal and external dimensions of rubber caps against the part being covered.

Custom colors are available to your Pantone color code. Include the code in your inquiry.

Rubber Caps · RSE

Rubber Caps-RSE

Compare A (inner diameter), B (outer diameter), C (inner depth) and D (total height), in mm.

Dimension guide

Product appearance

Part No.	A	B	C	D
RSE3.7-7-9	3.7	7	9	11
RSE4.7-8-9	4.7	8	9	11
RSE5.7-9-10	5.7	9	10	12
RSE6.7-10-10	6.7	10	10	12
RSE7.7-11-11	7.7	11	11	13
RSE8.7-12-12	8.7	12	12	14
RSE9.7-14-13	9.7	14	13	15
RSE10.7-15-14	10.7	15	14	16
RSE11.7-16-15	11.7	16	15	17
RSE12.7-17-15	12.7	17	15	18
RSE13.7-18-15	13.7	18	15	18
RSE14.7-19-15	14.7	19	15	18
RSE15.7-20-16	15.7	20	16	19
RSE16.7-21-16	16.7	21	16	19
RSE17.7-22-16	17.7	22	16	19

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