Marking Dyes | McMaster-Carr

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46 Products

Scribe-Enhancing Marking Fluids


Applicator-Top Can	Can	Bottle

Make scribe lines on surfaces easy to see with these fast-drying fluids.

Cannot Be Sold Outside United States—They cannot be sold outside the United States due to product labeling requirements.

Container Size	Fluid Type	Clarity	Container Type	Wt., oz.	Cannot Be Sold To	Choose a Color
2 fl. oz.	Liquid	Clear	Felt-Tip Bottle	—	Outside United States	Blue , Red	2131A74
4 fl. oz.	Liquid	Clear	Applicator-Top Can	—	Outside United States	Blue , Red	2131A61
8 fl. oz.	Liquid	Clear	Applicator-Top Can	—	Outside United States	Blue , Red	2131A62
16 fl. oz.	Aerosol	Clear	Can	12	Outside United States	Blue , Red	2131A64
1 qt.	Liquid	Clear	Bottle	—	Outside United States	Blue , Red	2131A65

Marking Fluids


Applicator-Top Can	Can

Stain metal items such as bearings, springs, nuts, and other components. These fluids repel oil, adhere without flaking and scaling, and won’t interfere with part performance.

Opaque—Opaque fluids conceal the color of the part.

Clear—Clear fluids allow the color of the part to show through and are thinner and dry faster than opaque fluids.

Cannot Be Sold Outside United States—Fluids that cannot be sold outside the United States exceed local regulatory limits on VOCs (volatile organic compounds).

Container Size	Fluid Type	Clarity	Container Type	Cannot Be Sold To	Choose a Color
8 fl. oz.	Liquid	Opaque	Applicator-Top Can	Outside United States	Dark Blue , Red , White , Yellow	2131A68
1 gal.	Liquid	Opaque	Can	Outside United States	Black , Dark Blue , Dark Green , Light Blue , Light Green , Red , White , Yellow	2131A73
1 gal.	Liquid	Clear	Can	Outside United States	Dark Blue	2131A202

Flaw Detecting Surface-Preparation Cleaners

Aerosol

Can

Remove oil, grease, and other contaminants that could alter results while inspecting for flaws. Originally made to meet aerospace standards, these cleaners dry fast without leaving a residue.

Container									Each
Type	Net Wt., oz.	Solution Type	Harshness	For Use On	For Removing	Specs. Met	Mil. Spec.		1-11	12-Up







			Sprays

			Aerosol Can	16	Solvent Based	Harsh	Carbide, Ceramic, Cobalt, Iron, Nickel, Stainless Steel, Steel	Dust, Grease, Oil	ASTM E1417	MIL-STD-2132, MIL-STD-271	1383T7	000000	000000

High Spot Blue Marking Paste

Identify high spots, interference points, and improper fit on bearings, gears, and valves. Apply this blue paste, also known as engineers’ blue, to parts or components and assemble them into working position. Any improper fit will show up as a blue streak. Remove paste with Marking Fluid Remover.

Cannot Be Sold Outside United States—Paste cannot be sold outside the United States because it exceeds local regulatory limits on VOCs (volatile organic compounds).

Container Size, fl. oz.	Fluid Type	Clarity	Container Type	Color	Cannot Be Sold To		Each
0.55	Paste	Opaque	Tube	Blue	Outside United States	6165K11	000000

Leak-Detecting Dye for Hydraulic Systems

Easy-to-see colors enable you to visually inspect for leaks.

Use 1 fl. oz. of dye for every 50 gallons of oil, solvent, wax, or other industrial fluid you're inspecting.

Fluorescent Red and Fluorescent Yellow—Fluorescent dye can be enhanced with a UV flashlight.

			Container
	Color	Max. Amt. of Fluid Treated, gal.	Size	Type		Each
Liquid



		Red	200	4 fl. oz.	Bottle	1400T23	000000


		Red	800	1 pt.	Bottle	1400T101	00000
		Blue	200	4 fl. oz.	Bottle	1400T21	00000
		Blue	800	1 pt.	Bottle	1400T103	00000
		Fluorescent Red	200	4 fl. oz.	Bottle	1400T22	00000
		Fluorescent Red	800	1 pt.	Bottle	1400T102	000000
		Fluorescent Yellow	200	4 fl. oz.	Bottle	1400T104	00000
		Fluorescent Yellow	800	1 pt.	Bottle	1400T105	000000

Lights

		Each
UV Mini Flashlight for Fluorescent Dye	1159N2	000000

Natural Light Flaw-Detection Dye Kits

Use colored dye to reveal cracks and surface flaws in most nonporous material. Flaws become visible under natural light and appear as a bright red color. Commonly used for weld inspecting.

For Use On	Includes	Specs. Met	Mil. Spec.		Each
Carbide, Cast Iron, Ceramic, Stainless Steel, Steel	Four 16-oz. Aerosol Cans of Cleaner, Two 16-oz. Aerosol Cans of Developer, Two 16-oz. Aerosol Cans of Red Dye	ASTM E1417, SAE AMS2644	MIL-STD-2132, MIL-STD-271	1383T3	0000000

Replacements for Flaw-Detecting Dyes

		Each
Cleaner	1383T7	000000	000000
Visible Red Dye	1383T4	00000	00000
Developer for Visible Red Dye	1383T5	00000	00000

UV Light Flaw-Detection Dye Kits

More sensitive than natural light kits, these kits use UV light with colored dye to detect cracks, seams, and pores on machined surfaces.

		Light
For Use On	Includes	Bulb Type	Wattage, W	Voltage, V AC	Connection Type	Electrical Connection	No. of Blades	Cord Lg., ft.	Specs. Met	Mil. Spec.		Each
Carbide, Cast Iron, Ceramic, Stainless Steel, Steel	One 16-oz Aerosol Can of Fluorescent Green Dye, One 16-oz. Can of Developer, Two 16-oz. Aerosol Cans of Cleaner, UV Light	Ultraviolet	5	120	Plug In	Straight Blade	3	9	ASTM E1417, SAE AMS2644	MIL-STD-2132, MIL-STD-271	1387T46	000000000

Accessories and Replacements for Flaw-Detecting Dyes

		Each
Cleaner	1383T7	000000	000000
Developer for Fluorescent Green Dye	1387T22	00000	00000
Fluorescent Green Dye	1387T8	00000	00000

Leak-Detecting Dye for Gasoline and Diesel Fuel Systems


Bottle	Jug

Detect leaks in fuel systems and storage tanks. Add this fluorescent yellow dye to your system and use a UV flashlight (sold separately) to illuminate leaks. Use 1 fl. oz. of dye for every 10 gallons of fuel.

			Container
	Color	Max. Amt. of Fluid Treated, gal.	Size	Type		Each
Liquid



		Fluorescent Yellow	160	1 pt.	Bottle	7507N11	0000000


		Fluorescent Yellow	1,280	1 gal.	Jug	7507N12	000000

Lights

		Each
UV Mini Flashlight for Fluorescent Dye	1159N2	000000

Leak-Detecting Dye Kits for HVAC Systems

Dye Kit with Sealant

Dye Kit

With bright-colored dye and a fully equipped kit, you have everything you need to spot leaks in your HVAC system. These kits come with the correct amount of dye required for your system's size. Inject the dye into your system and scan it with the UV light—the dye is fluorescent, so it’s easy to spot most leaks right away. For small leaks, let the dye circulate for 24 hours and then inspect it again. Use the dye cleaner before you fix a leak. If the repair isn’t sufficient, you’ll be able to spot more dye.

Four 0.5 oz. UV Dye and Sealant Containers—Kits with UV dye and sealant are formulated to seal hard-to-find leaks from the inside of your system. The dye and sealant formula is non-polymer and oil soluble, making it safe to stay in your system indefinitely. Reinforce seals from the outside for a permanent fix.

ANSI/ASHRAE Standard 86 and ANSI/ASHRAE Standard 97—Kits that meet ANSI/ASHRAE adhere to standards for chemical stability.

SAE J2297—Kits that meet SAE J2297 include dye that was originally made to detect leaks in automotive AC systems.

	Dyes							Replacement Dyes
	Color	For Max. HVAC System Size, BTU/hr	Container Size, fl. oz.	Includes	Specs. Met		Each		Each
Liquid



		Fluorescent Blue/Green	168,000	0.5	Four 0.5 oz. UV Dye and Sealant Containers, Adapter, Carrying Case, Cleaner, Hose Assembly, Injector, UV Light, UV Protective Glasses	ANSI/ASHRAE Standard 86, ANSI/ASHRAE Standard 97	7546N13	0000000	7546N14	000000


		Fluorescent Yellow	760,000	8	One 8 oz. UV Dye Container, Adapter, Carrying Case, Cleaner, Hose Assembly, Injector, UV Light, UV Protective Glasses	SAE J2297	7546N11	000000	7546N12	00000

Leak-Detecting Dye for Water Systems


Liquid, 1 pt. Container	Liquid, 1 gal. Container	Powder, 1 lb. Container Net Weight

2 Tablets	200 Tablets

Easy-to-see colors enable you to visually inspect for leaks without ultraviolet light.

One gallon of water occupies 0.1337 cubic ft. Calculate the number of gallons a tank holds by dividing the tank volume by 0.1337.

Tablets—Tablets are easy to use for small volumes of water, such as toilets and septic systems. They dissolve in five minutes. Tablets that come in a packet include instructions for detecting a toilet leak.

Liquid—Liquid is a good choice for larger volumes of water, such as sewers. It disperses faster than tablets and powder.

Powder—Powder is the best choice for the largest volumes of water, such as ponds, piping systems in power plants, and cooling towers.

Fluorescent Orange, Fluorescent Red, and Fluorescent Yellow/Green—Fluorescent dye can be enhanced with a UV flashlight.

				Container
	Color	Max. Amt. of Fluid Treated, gal.	No. of Tablets	Size	Net Wt., lb.	Type	Food Industry Std.	Includes		Each
Tablets



		Blue	4	2	—	—	Packet	NSF/ANSI 60	Instructions	1400T33	00000


		Blue	4,000	200	—	—	Jar	NSF/ANSI 60	—	1400T32	00000
		Fluorescent Orange	7,000	200	—	—	Jar	NSF/ANSI 60	—	1400T31	00000
		Fluorescent Red	12,000	200	—	—	Jar	NSF/ANSI 60	—	1400T43	00000
		Fluorescent Yellow/Green	12,000	200	—	—	Jar	NSF/ANSI 60	—	1400T12	00000


		Liquid



				Blue	12,500	—	1 pt.	—	Bottle	NSF/ANSI 60	—	1400T36	00000


				Blue	100,000	—	1 gal.	—	Jug	NSF/ANSI 60	—	1400T37	00000
				Fluorescent Orange	4,000	—	1 pt.	—	Bottle	NSF/ANSI 60	—	1400T34	00000
				Fluorescent Orange	32,000	—	1 gal.	—	Jug	NSF/ANSI 60	—	1400T35	00000
				Fluorescent Red	3,125	—	1 pt.	—	Bottle	NSF/ANSI 60	—	1400T44	00000
				Fluorescent Red	25,000	—	1 gal.	—	Jug	NSF/ANSI 60	—	1400T46	000000
				Fluorescent Yellow/Green	12,500	—	1 pt.	—	Bottle	NSF/ANSI 60	—	1400T45	00000
				Fluorescent Yellow/Green	100,000	—	1 gal.	—	Jug	NSF/ANSI 60	—	1400T49	00000


				Powder



						Fluorescent Red	60,000	—	—	1	Jar	NSF/ANSI 60	—	1400T38	000000


						Fluorescent Yellow/Green	120,000	—	—	1	Jar	NSF/ANSI 60	—	1400T52	000000

Lights