Quick answer
If you need to secure loose hardware on your holster, blue thread lock is the clear choice. A Sharpie marker is better for marking targets or writing on gear, not for preventing screws from backing out.
Why they are often compared
Both blue thread lock and a Sharpie marker are small, inexpensive items that often end up in a range bag. But they serve completely different purposes. Blue thread lock is a liquid adhesive applied to screws to keep them from vibrating loose, while a Sharpie is a permanent marker for writing on surfaces.
The confusion usually comes from the word 'marker' in the product names. Blue thread lock is not a marker at all, and a Sharpie cannot secure hardware. Knowing what each does helps you avoid using the wrong tool.
The trade-off: security vs. visibility
Blue thread lock gives you peace of mind that your holster screws won't back out during daily carry. It is a semi-permanent solution: you can still remove the screws with a little extra pressure, but they stay put under normal use.
A Sharpie marker offers no mechanical security. It is useful for marking hits on a target or writing the time on a tourniquet, but it will not prevent hardware from loosening. If you need to mark a screw position for reference, a Sharpie can help, but it is not a substitute for thread lock.
Which one should you choose?
- Need to secure screws: Apply blue thread lock to the threads of your holster screws after final adjustment. It will keep them from loosening while still allowing removal with extra pressure. Reapply if you disassemble the holster.
- Need to mark gear or targets: Use a Sharpie marker to write on targets, tourniquets, or other gear. It is permanent and handy for quick notes. Test on a small area first if the surface is delicate.
- Need both functions: Keep both in your range bag. Blue thread lock handles hardware security, and the Sharpie handles marking. They are not interchangeable. Store thread lock in a cool, dry place and cap the Sharpie when not in use.
Product facts
-
Blue Thread Lock (Single use): Blue Thread Lock is a single-use adhesive designed to keep holster hardware from coming loose while still allowing adjustments with extra pressure. Use it once you have your holster fit dialed in, and you won't have to worry about screws backing out during everyday carry.
Blue Thread Lock (Single use)
-
SHARPIE PERMANENT MARKER: Sharpie Permanent Marker is a standard marker useful for marking hits on a target or writing the time on a tourniquet. It's a versatile writing tool for range and gear use, but it has no effect on hardware security.
SHARPIE PERMANENT MARKER
Who should choose what
Best for
- Blue thread lock: anyone who carries a holster daily and wants to prevent screws from backing out
- Sharpie marker: shooters and medics who need a reliable marker for targets, tourniquets, or gear labels
Not for
- Blue thread lock: people who frequently adjust their holster fit and prefer quick changes
- Sharpie marker: anyone expecting a marker to secure hardware
