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7th Edition, March 2016

Complete Document

Sealant Compound, Adhesive, Anaerobic, Grade 242

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Product Details:

  • Revision: 7th Edition, March 2016
  • Published Date: March 2016
  • Status: Active, Most Current
  • Document Language: English
  • Published By: General Motors Company (GMNA)
  • Page Count: 5
  • ANSI Approved: No
  • DoD Adopted: No

Description / Abstract:

Material Description. A blue anaerobic, dimethylacrylate polyester resin base liquid compound that solidifies by polymerization (not by solvent evaporation) into a tough plastic when confined between closely fitted metal surfaces, producing an effective seal against leakage and medium shear strength resistance to loosening. This material may be used on slightly oiled cadmium and zinc plated, black oxide, and phosphate and oil coated parts and still obtain satisfactory properties. For maximum properties, parts must be cleaned.

Symbols. Not applicable.

Applicability. This material is intended for thread locking and sealing fasteners and studs for fluid pressure resistance or to prevent loosening under shock and vibration or a combination of both. May also be used for sealing hydraulic, pneumatic or pipe threaded fittings, and retaining keys and splines.

A material obtaining full thread locking strength with bond line thicknesses to 0.08 mm and seal with gap thicknesses to 0.15 mm using the Table 1 pin and collar test. The material curing time may be substantially reduced with accelerators or heat.

Temperature Use Range of -55 °C to +150 °C. Low temperature performance is based on maintaining 50% or more of the original minimum prevailing and breakaway torque after 2 h exposure (measure in 30 s or less). The low temperature test is not required for this standard. The upper temperature limit is based on Table 3 aging requirements.

Remarks. The words must, shall or will as used in this document mean a mandatory requirement.

Application of the product outside its use category (retaining and sealing) as defined by GMW16800, (Retaining and Sealing) is strictly prohibited.

Pre-applied thread form coatings have better uniform coverage and are ready to assemble for automotive production build. See GMW14657. Liquid products are mostly used for service repair.

Use of automated application dispensing system equipment designed for this product provides a measured uniform liquid coating. Contact the product manufacturer for equipment recommendations.

Finish Influence. Data in Table 1, Table 2 and Table 3 is based on standard test finishes listed in GMW16800. Production coatings and finishes are likely to provide different results.