Guangzhou Eric Wei Chemical Co., Ltd.
Guangzhou Eric Wei Chemical Co., Ltd.

Dow SILASTIC SE 1643 U Silicone Rubber

Dow SILASTIC SE 1643 U is a high-performance liquid silicone rubber (LSR) from Dow’s SILASTIC portfolio, offering excellent flow, low viscosity, rapid cure, and superior biocompatibility—ideal for precision medical device molding and demanding industrial applications.
  • dow silastic se 1643 u silicone rubber_8f21bffe
  • dow silastic se 1643 u silicone rubber_8f21bffe

Features Of Dow SILASTIC SE 1643 U Silicone Rubber

  1. High-consistency, addition-cure liquid silicone rubber (LSR) with excellent processability in injection molding.

  2. UL 94 V-0 rated for flame resistance, supporting stringent safety requirements in electronics and transportation.

  3. Outstanding thermal stability across –65 °C to +200 °C continuous service range.

  4. Low compression set and superior rebound resilience for long-term sealing performance.

  5. Biocompatibility compliant with ISO 10993-5 and USP Class VI, suitable for medical device components.

Typical Applications Of Dow SILASTIC SE 1643 U Silicone Rubber

  1. Medical tubing and fluid-handling components for diagnostic and therapeutic devices.

  2. Automotive sensors, gaskets, and under-hood sealing systems exposed to high temperatures and oils.

  3. Consumer electronics housings, buttons, and protective seals requiring tactile feedback and environmental resistance.

  4. Industrial connectors and encapsulation materials for power electronics and LED lighting modules.

Specifications Of Dow SILASTIC SE 1643 U Silicone Rubber

Chemical TypePlatinum-catalyzed addition-cure silicone rubber
Product FormTwo-part liquid (Part A + Part B), supplied as viscous liquids
AppearanceTranslucent to opaque, colorable with silicone pigments
Shore A Hardness (Cured)40 ± 3
Tensile Strength (ASTM D412)7.0 MPa typical
Elongation at Break (ASTM D412)550% typical
Cure SystemHeat-cured (150–180 °C for 1–5 min)
Primary ApplicationsMedical devices, automotive sealing, electronics encapsulation, industrial gasketing


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