xToolBlack Laser Marking Spray 2.0, 8.5 oz - Advanced High Contrast Formula for CO2, Fiber & Diode Laser Engravers - New & Improved Version

Used it on brass plates and it works great. Did it with my Xtool F1, followed the instructions and it could not have come out any nicer

This spray is amazing. Goes on and dries quick. Washed off with ease. Leaves a great finish on what you are engraving

Works great on 304 stainless.20 Watt DiodeSpeed 65Power 40Pass 1Dpi 120

Does not work good I would recommend other brands they do work better

xTool Black Laser Marking Spray 2.0 Review – The Ultimate Engraving UpgradeThis 8.5 oz spray is a game-changer for laser engraving, delivering deep, high-contrast marks on metals, plastics, and other tough surfaces. The new & improved formula works flawlessly with CO2, fiber, and diode lasers, making it a must-have for hobbyists and professionals alike.Key Benefits:Sharper, Darker Engravings – Creates bold, permanent marks with crisp detailUniversal Compatibility – Optimized for all major laser types (no more guesswork)Easy Application – Spray-on, dry quickly, and engrave with precisionLong-Lasting Results – Resistant to fading, scratching, and wearNo Residue Hassle – Wipes off cleanly after engravingWhether you’re personalizing jewelry, tools, or industrial parts, this spray elevates your results without extra steps. A worthy upgrade from the original formula.

Tried this spray on some keychains that the supplier claims are stainless steel (it's non-magnetic, so not sure). As you can see from the photos, it didn't turn out uniformly well. These were wiped with 90% isopropyl alcohol, but there were still problems with adhesion in a few places. The laser is operating at about 130W at about 400mm/sec, well over the minimum 25W recommended in the instructions. I closed down the spacing of the raster lines between the star image and the letters to try to clear up the light lines, which seemed to help. There are still artifacts in the strokes of the letters though: notice the light lines paralleling the edges on the U and L. I have not tried competing products on this laser to see if they are better or worse, but not very impressed with this spray so far.

This item works exactly as it should. No problem with it. I highly recommend the seller.