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Rubber extrusion tolerances directly determine sealing performance and assembly compatibility for custom rubber profiles. This article explains core definitions, widely‑used RMA and ISO 3302‑1 standards, material‑process‑design influencing factors, common defects, and practical guidance for specifying tolerances during procurement of extruded rubber seals.

Core difference: Rubber (EPDM/NBR etc.) is "thermoset", requiring vulcanization after extrusion. PVC is "thermoplastic", only melt + cool, no curing step. Both use multiple extruders feeding one shared die to make one integrated multi-hardness/multi-layer profile (like your pinch weld seals).

our EPDM extruded profile can be welded according to customer's requirement.

Leading Chinese manufacturer of custom rubber molded parts, offering precision compression, injection, transfer molding services. ISO 9001:2015 certified, diverse rubber materials for automotive, medical, aerospace, industrial HVAC sectors. Get fast custom quotes.

EPDM rubber extrusion is a high-precision continuous manufacturing method for producing durable sealing and protection profiles. Featuring outstanding UV resistance, weather aging resistance and stable compression performance, custom solid, sponge and co-extruded EPDM profiles are widely used in automotive, construction, HVAC, household appliances and industrial machinery. This article details the complete extrusion process, product types, core advantages and mainstream industrial application scenarios of EPDM extruded rubber seals.

Qingdao Todo Rubber has completed the shipment of one full 40HQ container of extruded glazing seals for the Northern Europe market.