Industrial Silicone Sealing Strips & Profiles: Mechanical Enclosure Guide

Manufacturer: Dongguan Yunze Silicone Products Co., Ltd. — industrial silicone & rubber components, custom tooling, RoHS / REACH / FDA grades.

Silicone sealing strips and profiles for mechanical enclosures

Extruded silicone sealing strips and profiles are used on equipment doors, control cabinets, hatches, windows and panel joints. They are specified where a compressible, UV- and temperature-stable seal is required over a long service life, typically from −40°C up to +200°C for standard grades and higher for specialist compounds.

What to specify

Profile geometry. Provide a cross-section drawing or a cut sample. Solid, hollow, sponge, lip and bulb profiles each suit different closing forces: hollow and sponge profiles need less compression force, solid profiles resist higher pressure.

Compression set and squeeze. Design for roughly 20–30% compression on the seal height so the profile continues to seal after aging. State the gap tolerance the seal has to absorb.

Hardness. Shore A 40–60 covers most enclosure seals; softer compounds follow uneven surfaces, firmer compounds resist extrusion under pressure.

Environment. Cleaning agents, oils, coolants, ozone and UV exposure all decide whether a standard silicone or a specialist compound is needed.

Attachment and installation

Strips can be supplied with adhesive backing, push-in barb, or as a plain extrusion for mechanical retention. Where the seal meets a corner, mitred or moulded corner pieces reduce leak paths. Confirm the retention method before tooling, because it often changes the profile.