Loctite 243 Medium Strength Surface Insensitive thread locker features a general purpose, medium strength, blue thread locker with a high oil tolerance. It has a higher temperature range than all the other blue thread locker...

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Product Review

Loctite 243 Medium Strength Surface Insensitive thread locker features a general purpose, medium strength, blue thread locker with a high oil tolerance. It has a higher temperature range than all the other blue thread lockers at 360F. For fasteners between 1⁄4" to 3⁄4" (6 mm to 19 mm). Parts can be separated using hand tools. Typical applications include Rocker studs, rocker adjustment bolts, bolts on valve and cam covers, oil pans, disc brake calipers, intakes and alternators, and pulley assemblies.

  • Trusted by Professionals: Our blue LOCTITE automotive thread locker products are not just OEM-specified, they are trusted by professionals because they are designed by auto manufacturers and lab tested (PN: 1330906)
  • Works on all metals: Works on all metals, including passive substrates such as stainless steel, aluminum, and plated surfaces; features enhanced minor oil tolerance for superior performance
  • Reliable & Durable Performance: Engineered for securing components that endure heavy shock, vibration, and extreme chemical or environmental conditions so it will requires localized heating and hand tools for easy disassembly
  • Multi-Application: Perfect for use on rocker studs, rocker adjustment bolts, bolts on valve and cam covers, oil pans, disc brake calipers, intakes and alternators, and pulley assemblies; Ideal for all nut and bolt applications ¼" to ¾" (6 mm to 20 mm)
  • Quick-setting for convenience: The product begins setting in just 10 minutes, giving you a quick start on your project, and reaches its full strength after 24 hours, ensuring a complete and durable cure by the next day and is temperature resistant up to 140 degrees

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