There are 2 products.
Bel Ray Super DOT 4 Hydraulic Brake Fluid Formulated for hydraulic brake systemsMixes with all fluids meeting DOT 3 and DOT 4 specificationsBoiling point: dry 230C (446F), wet 155C (311F)For brake systems and hydraulic clutches, except systems using mineral base fluids
Bel Ray Silicone DOT 5 Hydraulic Brake Fluid Formulated for hydraulic brake systemsMixes with all fluids meeting DOT 5 specifications (not compatible with DOT 3 or DOT 4)Boiling point: dry 260C (500F), wet 185C (365F)Will not damage paint or absorb moistureFor brake systems and hydraulic clutches, except systems using mineral base fluids