Dykem Cross Check Plus


Direct replacement for F-925. Use on all critical fittings and locknuts during OEM and maintenance procedures

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Cross Check Plus Tamper Proof Torque Mark+ has been formulated for the exacting standards of the aviation industry. Organic Products’ F-925 Skydrol-Resistant Seal was the industry standard for decades and Cross Check Plus is designed to fill that void and meet the needs of today’s aviation environment. 

Cross Check Plus dries to the touch quickly and is highly visible with fluorescent colors. The marks offer excellent adhesion to substrates and provide you with the peace of mind knowing your critical fasteners remain torqued.


  • Highly visible fluorescent color paste that dries fast.
  • Passes RTCA-DO-160 Skydrol PE-5 solvent susceptibility test.
  • Mark will be easily broken if parts are tampered with or become loose.
  • Provides a convenient visual method for identification of vibratory loosening or tampering on nuts, bolts, fasteners and assemblies.
  • Easily detects when torque has changed.
  • Provides warranty protection against tampering.
  • Withstands Skydrol PE-5, and industrial cleaning agents.
  • Highly visible under ambient light and fluorescent under UV light.
  • Excellent adhesion to metal and other substrates.

Physical properties

Apparence: Opaque viscose liquid.
Odor: Mild
Specific gravity: 1.02
VOC level: <50.00% by weight
Flash point: 33°F
Dry Time*: <120 Seconds for dry to touch. Completion of curing takes 7-10 days.
Heat Resistance: 400°F
Shelf Life Two years
*Note: Curing time can be accelerated by exposing marked substrate to 130°F for over-night.
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