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Viton™ B-651C is a precompounded fluoropolymer that offers excellent mold flow, high tear resistance, and improved bonding to metal inserts.
Viton™ B-651C is a fully precompounded fluoroelastomer composed of hexafluoropropylene (HFP), vinylidene fluoride (VF₂), and tetrafluoroethylene (TFE).
Viton™ B-651C is a B-family terpolymer with 68.5% fluorine content. Compared to Viton™ B-435C, Viton™ B-651C is featured with a higher viscosity while offering similar processing properties and tear resistance. It is an excellent choice for use in the injection molding of complex shapes and bonded metal inserts.
Physical Form: Slab
Appearance: Off-white
Odor: None
Nominal viscosity, ML1 + 10 at 121 °C (250 °F): 60
Specific gravity: 1.84
Storage stability: Excellent
Primary Chemistry: Terpolymer of hexafluoropropylene, vinylidene fluoride, and tetrafluoroethylene with cure chemicals
Fully precompounded with curative and metal adhesion promoter
Higher viscosity than other B-family grades
Scorch-free mold release with high mold fouling resistance
Fast cycle times and improved processing properties
Excellent tear strength and chemical resistance
Low viscosity of commercially available FKM and fluoroelastomer compounds
Limited resistance and tear strength in traditional rubber compounds
Cross-linking and curing difficulties of fluoroelastomer gums and rubber compounds
Injection molding of complex shapes
Molding of bonded elastomeric inserts
Gaskets, O-rings, and rubber parts
Engine crank and camshaft seals
Valve cover seals
Fuel sender seals
Rubber membranes and fuel duct expansion joints
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