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

Dow XIAMETER RBB-6640-40 Silicone Rubber

Dow XIAMETER® RBB-6640-40 is a high-consistency silicone rubber (HCR) from Dow’s XIAMETER® portfolio offering excellent mechanical strength thermal stability and compression set resistance ideal for automotive medical and industrial molding applications. It cures rapidly via platinum-catalyzed addition curing delivers consistent flow and enables efficient high-volume production with low volatility and outstanding dimensional stability.
  • dow xiameter rbb 6640 40 silicone rubber_cc4eeecb
  • dow xiameter rbb 6640 40 silicone rubber_cc4eeecb

Features Of Dow XIAMETER RBB-6640-40 Silicone Rubber

  1. High-consistency, two-part addition-cure silicone rubber with excellent processability in compression and transfer molding.

  2. Offers outstanding thermal stability and long-term performance across a wide temperature range (–50 °C to +200 °C).

  3. Low compression set and superior resilience for durable sealing and dynamic gasket applications.

  4. Meets ISO 10993-5 and USP Class VI biocompatibility requirements for medical device manufacturing.

  5. Consistent batch-to-batch quality with controlled rheology and minimal volatile content.

Typical Applications Of Dow XIAMETER RBB-6640-40 Silicone Rubber

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

  2. Seals, gaskets, and diaphragms in pharmaceutical processing equipment.

  3. Custom molded parts for wearable health monitors and implantable device housings.

  4. High-reliability elastomeric components in analytical instrumentation and lab-on-a-chip systems.

  5. Food-contact compliant seals and liners for beverage and dairy processing machinery.

Specifications Of Dow XIAMETER RBB-6640-40 Silicone Rubber

Chemical TypePlatinum-catalyzed addition-cure silicone rubber
Product FormTwo-part liquid system (Part A: base; Part B: catalyst)
AppearanceOpaque, off-white to light tan paste (Part A); translucent amber liquid (Part B)
Shore A Hardness (ASTM D2240)40 ± 2
Tensile Strength (ASTM D412)8.5 MPa (typical)
Elongation at Break (ASTM D412)450% (typical)
Cure SystemHeat-activated (150 °C for 5 min typical)
ComplianceISO 10993-5, USP Class VI, FDA 21 CFR 177.2600


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