HS-937 Gun and Bore Coatings

HS-937 nano-ceramic gun and bore coating is a solvent-based product that is made specially for coating the inside of firearm barrels and any and all of their other components filling all the metal’s micro-pores .  This product protects the entire surface from corrosion from the elements, leaving them sealed and slick, and easy to clean.

This single component, ambient air cured product is easily wiped-on application that creates a covalent bond to the substrate and a permanent part of the metallic substrate’s structure.  It is an extremely tough coating, and it is direct flame and high temperature resistant.  It also offers extreme corrosion resistance, has hydrophobic properties, helps to prevent carbon build-up in gas ports, greatly reduces or even eliminates bore cleaning time, and doesn’t change velocity or trajectory of fired rounds. HS-937 is a super-slick dry film lubricating coating that works with or without the use of oils.

This coating is a micro-thin nano-ceramic that, when cured, is clear, hard, and hydrophobic.  It is extremely UV resistant, corrosion resistant, and weather resistant.

The product is normally applied via a bore mop or lint-free cloth, leaving a 2-3 micron hard and slick thin film on the surfaces coated.  Ambient cure and short dry time.  Cure inside the barrel bore is completed by firing one or more live rounds through the barrel, any time after the coating is dry to the touch.  This not only conforms the coating to the barrel, but leaves tolerances measurably unchanged.  The intense heat and pressure, caused by the round being fired, sinters the nano-ceramics to an extremely super slick and tough material that often is beyond that of the metal itself.

The micro pores, when filled with a hard, slick ceramic material, will help to prevent the corrosion and helps eliminate powder and copper fouling within the barrel.  This greatly reduces the need for cleaning and lubricating, if not totally eliminating the need.  Normal firearms lubricants will not harm the cured coating.

HS-937 Properties


Color Clear
Viscosity 16-18 sec. #2 Zahn
Percent of Solids 18%
Odor (liquid) Slight Solvent
Odor (cured) None
V.O.C. Exempt per CFR 51.100/regulation 8
RoHS Compliant
REACH Compliant
Halogens None
Thermal Stability (cured) 1200+ degrees F (648.8 degrees C)
Conical Bond (1/8 inch mandrel) Passed (ASTM D522-93a)
Cross cut adhesion 5B (ASTM D3359)
Coefficient of Friction 0.03 microns (ASTM D2047)
Specific Gravity 0.889 (ASTM D891-09)
Pencil Hardness 8h (ASTM D3363)
Average applied dry film thickness 2 to 5 microns
Est. Coverage Rate @ 3 microns 4200 sq ft / gal
Transfer to surrounding material Zero (0) transfer of contaminates
Dry to Touch (time @ ambient) 15-25 minutes (average)
Ambient cure (full properties) 5 days
Ambient cured properties normally exceed those of oven cure
Oven cure (convection type-airflow) 350 degrees F 30 minutes (part temperature)