Custom made waterproof FDA silicone hole plugs

Custom silicone hole plugs can be developed for openings where water control and food contact considerations both influence selection. The body profile should match the opening, while the finished silicone formulation should suit the intended contents and cleaning conditions. These requirements need to be considered together in the completed assembly.

Identify the contact surfaces that perform the closing function. A shoulder may control insertion depth while another section engages the hole. Check that the mating component supports those regions without a step, burr or trapped particle interrupting contact. Assess water exposure with the plug fitted in its working position rather than judging the closure by appearance alone.

If the plug is routinely removed for cleaning, leave enough accessible material for handling without puncturing or stretching it. Clean both the plug and the opening before refitting, and keep replacement variants matched to their specific locations. A damaged edge or a permanently changed profile should be corrected through replacement, not hidden by pushing the plug deeper. The intended seating geometry should remain recognizable after repeated use.

Material options

Custom silicone compound; formulation and geometry developed together.

Hardness selection

Silicone options: 20–80 Shore A. A shoulder may control insertion depth while another section engages the hole.

Custom geometry

Check that the mating component supports those regions without a step, burr or trapped particle interrupting contact.

Fit evaluation

The intended seating geometry should remain recognizable after repeated use.

Color & OEM

Custom colors; OEM identification positioned outside closure contact surfaces.

Photos illustrate structure or material appearance only. A shoulder may control insertion depth while another section engages the hole. ETOL directly manufactures custom-shaped silicone and rubber parts to your requirements.