Custom Rubber Extrusions: Profiles, Trim & Seals

Custom rubber extrusions are continuous profiles—seals, trim, gaskets, and tubing—formed by forcing uncured compound through a die, then cured in a steam, salt-bath, or microwave line. They are ideal for long, uniform runs on enclosures, doors, windows, and machinery. At Anlintech we extrude EPDM, silicone, NBR, neoprene, and TPE in solid, sponge, and co-extruded profiles with steel or fabric carriers.

Extrusion Profile Types

• Solid profiles – dense seals and edge trim for compression sealing.
• Sponge / cellular – open- or closed-cell EPDM and silicone for low-closure-force gaskets.
• Co-extruded – two materials (e.g., dense skin over sponge core, or rubber over a metal/plastic carrier).
• Self-adhesive trim – profile with a pressure-sensitive backing for quick installation.
• Tubing & cord – round or custom hollow sections for fluid and protective use.

Material Selection

Dimensions and cell-structure requirements are defined by ASTM and ISO; we hold profile tolerances to ISO 3302-1.

How to Specify an Extrusion

1. Cross-section drawing or sample (we can reverse-engineer from a sample).
2. Material and hardness (Shore A for solid, density for sponge).
3. Durometer and color (including UV-stable and food-grade).
4. Continuous length and splice/corner requirements.
5. Carrier or adhesive options if needed.

For cured-property trade-offs across materials, see our EPDM vs NBR vs FKM and silicone vs EPDM guides.

Typical Applications

• Building & enclosures – door, window, and cabinet edge trim.
• Automotive & transport – weatherstripping and glazing seals (see EPDM automotive seals).
• Electronics – IP-rated gasket strips (see IP67/IP68 sealing).
• Industrial – machine guards, ducting, and protective trim.

Manufacturing & Splicing

After extrusion and cure we can splice profiles into frames (hot-air, microwave, or vulcanized joints), punch holes, and apply adhesive. For short runs or complex shapes, compare with molded rubber components and compression vs injection molding.

Frequently Asked Questions

What is the difference between solid and sponge extrusions?

Solid profiles are dense and best for high-compression seals; sponge (cellular) profiles seal at very low closure force and suit uneven surfaces and doors.

Can you match an existing extruded seal?

Yes. Send a sample and we reverse-engineer the cross-section, then extrude a match in your chosen compound and hardness.

Which material is best for outdoor weatherstripping?

EPDM sponge is the standard for outdoor UV and weather resistance; silicone is chosen when temperatures exceed EPDM limits or food/medical contact applies.

Can extrusions be joined into a frame?

Yes. We vulcanize or hot-air splice corners and ends into closed frames with joints matched to the parent profile.

Get a Quote

Send your cross-section drawing or sample with length and material needs. Request an extrusion quote → or see our FAQ. Back to custom rubber parts.