Clearco Products

3430 G Progress Drive - Bensalem, PA 19020 - Telephone: 1-800-533-5823 U.S. & Canada 215-639-2640 International: 1-011-215-639-2640 Fax: 215-639-2919

Specialty Silicones by Application

Products Description: Clearco’s STO-50 silicone transformer oil may be considered for use in all types of transformer applications, where safety, toxicity, and environmental hazards are of primary concern. The DOT 5 Silicone Brake Fluid meets Mil-PRF-4617B * SAE J 1705.

Clearco STO-50 may be considered for use in all types of transformer applications, where safety, toxicity, and environmental hazards are of primary concern.

Synonyms: transformer oil, silicone transformer oil, transformer fluid, silicone transformer fluid, dielectric fluid, dielectric oil, silicone dielectric oil, power distribution transformer oil, railroad precipitator oil, electrostatic precipitator oil, pulse transformer oil, dielectric coolant, liquid filled transformer oil, GE SF97-50, GE SF97, Dow Corning® 561, DC 561

STO-50 Silicone Transformer Oil

Dielectric silicone fluid for transformers

Product Equivalent: GE SF97-50 and Dow Corning® 561

Use: Clearco Silicone Transformer Oil is a 50cSt polydimethylsiloxane dielectric fluid, which has been processed and controlled to meet certain electrical specifications. Although dimethyl silicones are available in a wide range of viscosities, the 50cSt fluid provides an optimum combination of relative flammability* and heat transfer.

Clearco STO-50 exhibits excellent dielectric, thermal and chemical properties, which makes it a high performance, environmentally safe replacement for PCB containing askarels as the dielectric coolant for liquid-filled transformers.

*STO-50 fluid has an oxygen index of 21.4 and when tested, has self-extinguishing in air when the flame source was removed. The oxygen index is the minimum amount of oxygen required to sustain burning of a material after it has been ignited.

Availability: 5 & 55-gallon containers


DOT 5 Silicone Brake Fluid meets Mil-PRF-4617B * SAE J 1705

Synonyms: DOT 5 Silicone, DOT5 Silicone, DOT 5 Silicone brake fluid, silicone brake fluid, high temp brake fluid, low temp brake fluid, high temp silicone brake fluid, DOT 5 Brake Fluid, Brake fluid, SAE J 1705 Brake Fluid, SAE J 1705 Silicone Brake fluid, Mil-PRF-4617B brake fluid, Mil-PRF-4617B silicone brake fluid, non-glycol brake fluid, BFS fluid, BFS silicone brake fluid, purple brake fluid, blue brake fluid, Si brake fluid, DOT-5 brake fluid, DOT-5 silicone brake fluid, 100% silicone brake fluid, NATO code No. H-547 silicone brake fluid, Department of Transportation 5 Silicone Brake Fluid, Department of Transportation Brake Fluid 5

DOT 5 Silicone Brake Fluid

Use: Clearco DOT 5 Silicone Brake Fluid is a bluish-purplish viscous fluid formulated for use in hydraulic brake systems at ambient temperatures ranging from –55∞C to 55∞C. The fluid is identified by military symbol BFS and NATO code No. H-547.

Meets Mil-PRF-46176, Mil-PRF-46176B, DOT 5 & SAE J 1705 (Society of Automotive Engineers)

DOT 5 provides corrosion protection and lubrication of the brake system components. In comparison to DOT 3 & 4 fluids (glycol-based fluids), Clearco DOT 5 it is a highly compressible fluid. In addition, it has a higher dry boiling point (260∞C) and wet boiling point (180∞C). Clearco DOT 5 will not damage paint as well.

Clearco DOT 5 Silicone Brake Fluid is compatible with SBR, EP, Neoprene, Natural Rubber and other brake material systems.

Features & Benefits:

  • Blue-Viscous Fluid
  • Silicone Based
  • Non-Flammable
  • Highly Compressible
  • High Temp Serviceability: 55C
  • Low Temp Serviceability: -55C
  • Will not damage paint
  • Will not absorb moisture

Availability: 5 & 55-gallon containers