Bsc Preferred MK503YE Permanent Marking Stick Yellow 12pk

Product Description

The BSC PREFERRED MK503YE is a permanent marking stick formulated for marking on dark surfaces where standard markers fail to show. The opaque, quick-drying ink adheres to wet and oily surfaces, making it practical in field conditions where surfaces are not clean or dry. The non-refillable barrel carries a large ink reservoir for extended use before replacement. Ink is waterproof, smearproof, and fade-resistant, delivering consistent legibility on non-porous materials including concrete, glass, and metal. Sold as a case of 12 sticks, this product suits tradespeople, maintenance technicians, and job-site crews who mark pipe, conduit, structural members, or equipment on a regular basis.

This marking stick is suited for use across construction, HVAC, plumbing, and electrical trades where permanent, readable marks are needed on dark or non-porous surfaces. Typical applications include labeling conduit runs, marking cut lines on pipe, identifying equipment panels, and annotating metal ductwork. Because the ink is formulated for wet and oily conditions, it remains effective even after surface contact with condensation, cutting fluids, or light oils commonly encountered during installation and service work.

Key Features

• Opaque ink delivers visible marks on dark surfaces where standard markers are unreadable
• Quick-drying formula adheres to wet and oily surfaces without smearing
• Waterproof, smearproof, and fade-resistant ink maintains legibility after exposure
• Works on non-porous surfaces including concrete, glass, and metal
• Large ink reservoir in a non-refillable barrel for extended field use
• Case quantity of 12 sticks reduces reorder frequency on active job sites

Compatibility

The MK503YE is equivalent to part number H-763Y. Designed for use on non-porous, dark, wet, or oily surfaces across general trade and industrial marking applications.

Installation Notes

No installation required. Store caps on when not in use to prevent ink from drying at the tip. Keep away from extreme heat sources that could affect ink viscosity or barrel integrity. Dispose of spent markers according to local regulations for marker and solvent-based products.