Cross-Check provides a convenient visual method for identification of vibratory loosening or tampering in nuts, bolts, fasteners, and assemblies. Provides protection against tampering. Marks will be easily broken if parts are tampered with or become loose. Highly visible under ambient light. Excellent adhesion to metal and other substrates. Its like a wax seal for critical holds and fastening, Tamper-Proof Torque Mark, Safe for most surfaces, Highly visible, Excellent adhesion, Visually detects loose nuts And bolts, Provides protection, Dries to the touch 1-2 hours, Fully cured: 24 hours, GHS compliant labeling, Two year shelf life.