A blue fluorescent threadlocker with medium strength, which closes and locks bolts and nuts to prevent it comes loose with vibrations and shocks. Excellent alternative to Loctite 243. Suitable for stainless steel and galvanized steel. Medium strength which means removable with normal hand tools. Temperature resistant up to 150 °C. Clearances up to 0.25mm. Prevents loosening nuts and bolts. Very durable. Resistant to many alkaline solutions, solvents, oils, fuels and gases. Fluoresces under UV light for inspection and quality control.