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

Dow SYLGARD 1-4128 Silicone Rubber

Dow SYLGARD 1-4128 Silicone Rubber is a two-part platinum-cured elastomer offering exceptional thermal stability, low compression set, and outstanding electrical insulation. Ideal for encapsulation, potting, and soft-touch applications, it cures at room temperature or with mild heat, delivering high elongation, tear resistance, and biocompatibility per ISO 10993. Trusted in medical, automotive, and electronics industries.
  • dow sylgard 1 4128 silicone rubber_99f62efa
  • dow sylgard 1 4128 silicone rubber_99f62efa

Features Of Dow SYLGARD 1-4128 Silicone Rubber

  1. Two-part, platinum-cured liquid silicone rubber offering excellent flow and low viscosity for precise mold filling.

  2. Fast room-temperature cure with optional heat acceleration—enabling high throughput in production environments.

  3. Exceptional biocompatibility, compliant with ISO 10993-5 and USP Class VI for medical device applications.

  4. Outstanding thermal stability across -65 °C to 200 °C with minimal compression set retention.

  5. Low extractables and low volatility, supporting stringent regulatory requirements for implantable and drug-contact components.

Typical Applications Of Dow SYLGARD 1-4128 Silicone Rubber

  1. Medical-grade tubing and catheters requiring flexibility, kink resistance, and sterilization compatibility.

  2. Implantable sensors and encapsulated electronic assemblies for long-term in-body performance.

  3. Drug delivery device components, including pump diaphragms and valve membranes.

  4. Soft-touch overmolding on rigid substrates for ergonomic medical and diagnostic equipment housings.

  5. Microfluidic device fabrication where high-resolution replication and chemical inertness are critical.

Specifications Of Dow SYLGARD 1-4128 Silicone Rubber

Chemical TypePlatinum-cured addition-cure liquid silicone rubber
Product FormTwo-component (Part A + Part B) liquid system
AppearanceClear to translucent viscous liquids (Part A and Part B separately)
Primary ApplicationsMedical devices, implantables, drug delivery systems, microfluidics
Key FeaturesLow viscosity, fast cure, biocompatible, low extractables, high purity
BenefitsExcellent detail reproduction, consistent mechanical properties, autoclave & EtO compatible
Cure SystemPt-catalyzed hydrosilylation (inhibition-free at room temperature)
Regulatory StatusISO 10993-5 tested; USP Class VI compliant; meets FDA 21 CFR 177.2600


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