General Characteristics
- ASTM D-2000 Classification: FK
- Military: MIL-R-25988, Amend. 2
- Chemical Definition: Fluorosilicone
- Durometer Range (Shore A): 50-80
- Tensile Range (P.S.I): 500-800
- Elongation (Max %): 300
- Compression Set: Good
- Resilience-Rebound: Excellent
- Abrasion Resistance: Poor
- Solvent Resistance: Fair
- Oil Resistance: Good
- Low Temperature Usage (F°): -80°
- High Temperature Usage (F°): 300°
- Aging Weather-Sunlight: Excellent
- Adhesion to Metals: Poor
Fluorosilicone is considerably more expensive than silicone, however it is developed for special applications where general resistance to oxidizing chemicals, aromatic and chlorinated solvent bases is required. Fluorosilicone is not recommended and is generally attacked when exposed to brake fluids, hydrazine and ketones. Fluorosilicone should not be confused with silicone in regard to high heat resistance.