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Permatex does not suggest adding any solvents, chemicals or fillers to any of our products that will change their formulas, characteristics or the way that the product was designed to perform. Permatex offers many other products that may work for your application.
Substituted with Ultra Black
Ultra Blue has served us well, but for those who demand more from their gasket maker, Ultra Black is here to deliver. Not just another RTV silicone gasket maker; it’s a leap forward in performance and reliability.
Permatex Ultra Blue is a multi-purpose sensor-safe, low-odour, non-corrosive RTV gasket maker. Ultra Blue is tested to OEM specifications and outperforms conventional silicones. Temperature range -54°C to 260°C (-65°F to 500°F) intermittent; resists auto and shop fluids and vibration.
