TBR-series Viton Extreme is formulated for the widest base resistance across the Viton Extreme range — where ETP and GBL are tuned primarily around amine and steam/acid exposure respectively, TBR is the choice when a process chemistry spans multiple aggressive base chemicals rather than one specific attack mechanism. FITCO's application engineers can help map your actual fluid list against ETP, GBL and TBR before you commit to a grade.
| Temperature range | -20°C to +230°C |
|---|---|
| Hardness range | 70–90 Shore A |
| Relative cost | $$$$ |
| Resists | The broadest range of base/caustic chemicals within the Viton Extreme family, plus standard FKM's hydrocarbon/fuel resistance |
| Avoid with | Same general limits as standard FKM outside its improved base-resistance range |
| Standards | AS568 / ISO 3601 / BS 4518 |
Viton Extreme — TBR Series isn't a single formulation — the grade below matters as much as the base compound once your application gets specific.
The standard TBR-series compound — formulated to hold up across a wider span of aggressive base chemicals than either ETP-S or GBL-S, at the cost of being less optimized for any single one of them.
Not sure which sub-grade fits your application? Send us your fluid, temperature and pressure and our engineers will confirm — send an enquiry →
General-purpose seal for mineral oils, fuels and hydraulic fluids.
-20°C to +200°CHigh-temperature, chemical-resistant sealing for oil & gas and process industries.
-15°C to +327°CNear-universal chemical resistance for the most demanding process seals.
FEP encapsulated O-rings use standard Silicone or standard Viton FKM as the elastomer core — not specialty sub-grades. If you need FEP encapsulation, the core is standard FKM, not this specific grade.
Standard FKM details → Specialty ProductThin PTFE coating on the FKM O-ring surface — reduced assembly friction, anti-stick, dry lubrication for production line assembly without grease.
PTFE Coated O-Rings → Custom SizesNon-standard ID or cross-section? FITCO manufactures custom O-rings in all Viton grades to any dimension — send your drawing or ID × CS in mm.
Custom O-Ring sizes →Send us your fluid, temperature and pressure — our engineers will confirm the compound.
