Full definition
A continuous-length rubber piece with a constant cross-section produced by extrusion through a precision die, then continuously vulcanized in a hot-air tunnel, microwave oven, salt bath, or LCM (liquid curing medium). Standard cross-section shapes: P-profile (bulb seal for doors/hatches), D-profile (half-round for surface contact sealing), E-profile (symmetrical for window channels), U-channel (edge trim/protection), J-profile (hook seal), rectangular/square, round cord, and hollow tubular. Custom profiles are designed to meet specific sealing, protection, or mounting requirements. Materials: EPDM (most common — for outdoor, weatherstrip, and general sealing), silicone VMQ (high-temperature, food-grade, medical), neoprene CR (oil + weather + flame resistance), NBR (oil-resistant), and TPE (thermoplastic, no vulcanization needed). Dimensions: from 3 mm to 200+ mm across. Tolerance: ±0.2-0.5 mm on critical dimensions. Surface finish: smooth, textured, or flocked (for low-friction sliding contact). Sold by the meter, spool, or cut to length. Adhesive-backed options available. Per ASTM D2000 for material, company-specific drawings for dimensions. Applications: door and window seals, cabinet gaskets, hatch seals, edge protectors, and equipment enclosure weatherstripping.