Skip Content

Want to pay an invoice? Please call us at 1-800-GRAINGER (1-800-472-4643).


Penetrant, Kit

  • Item# 3WU63
  • Mfr. Model# SK-416
  • Catalog Page# 3046
  • UNSPSC# 41111932
Penetrant,Kit close
close x

Using 360° Viewing:

  1. Rotate: Use top-to-bottom, side-to-side by use of mouse arrow.
  2. Zoom In: Double click on image.
  3. Zoom Out/Reset: Put photo at full zoom & then double click.
Megaphone How can we improve our Product Images?

Price $123.10 / each

Activate Now

to save with

Select AdvantageSM

Please sign in or register to access lists

Please sign in or register to access Quote

Jump to:
  • Shipping Weight 10.0 lbs.
Country of Origin USA Country of Origin is subject to change.
Note: Product availability is real-time updated and adjusted continuously. The product will be reserved for you when you complete your order. More

Product Details

This visible dye spot-check kit is part of a 4-step process to help detect leaks and stress and fatigue cracks in metal surfaces.

View More

Technical Specs

  • Item Spotcheck Kit
  • Application For Detecting Cracks and Leaks in Metal Surfaces, Lifting Devices, Automotive Parts, Valves, Pipes, Pressure Vessels and Tanks, Tool Shops, Fire Departments and Amusement Parks
  • Includes One Each of 3WU59 and 3WU60, Two Cans of 3WU61, Handy Paint Marker, Hand Wipes and Instructions
Megaphone How can we improve our Technical Specifications?

Compliance and Restrictions

  • Hazardous material - Other Regulated Material

  • This product contains a chemical that is regulated under California Proposition 65.

    Warning: This product contains a chemical known to the State of California to cause cancer.

    Warning: This product contains a chemical known to the State of California to cause birth defects or other reproductive harm.

Alternate Products

Alternate Products may not be identical in style or function to original selection. Please compare below for more information.

Customer Reviews

Rated 5 out of 5 by 3reviewers.
Rated 5 out of 5 by I was a NDT inspector in the Navy and used a ton of this stuff, it works as advertised. However it also works very well for removing old rusty nuts, bolts and, exhaust manifold bolts. The only requirement is you have to de-grease or clean the area around the bolt, it has to get into the tread to wet it. This stuff will make WD-40 or Pb blaster look like a joke. Be careful with the stuff, it will stain the heck out of your skin, it will not wash right off and will never come out of your clothes. Just spray it into an old aerosol can cap and apply with a flux brush that you can buy for fluxing sweat joints for copper fittings. Apply and let it sit for 30 minutes to an hour. A friend of mine just removed his 17 year old exhaust bolts on his Jeep and they came right out with no problem. The previous owner broke one of them off below the surface and after an application of this stuff and an easy out the, broken bolt came right out. Oh yes, it works great for detecting cracks too.....grin September 29, 2016
Rated 5 out of 5 by Product worked as advertised. Needed a way to test for cracks in marine cylinder block. Kit is a very good way for someone that needs to check things inexpensively once in a while. Kit contains enough to make a lot of test. August 12, 2013
Rated 5 out of 5 by Product worked as advertised. I was working on repairing cracks in a diesel engine block and did not have access to a magnetic Magnaflux unit. The nice thing about the dye, is that I could follow the dye in the crack as I ground my grove into the cast iron for welding. May 24, 2013
  • 2016-10-21 T19:16:35.448-05:00
  • bvseo_lps, prod_bvrr, vn_prr_5.6
  • cp-1, bvpage1
  • co_hasreviews, tv_3, tr_3
  • loc_en_US, sid_3WU63, prod, sort_default
1-3 of 3

Product Reviews Disclaimer:
Grainger is neither responsible for, nor does it endorse, the content of any product review or statement posted. Any statements posted constitute the statements of the poster and are not the statements of Grainger. The statements posted by Grainger employees with the Grainger employee badge represent the views of such employees and are not the statements of Grainger. Grainger makes no representations as to the appropriateness, accuracy, completeness, correctness, currentness, suitability, or validity of any product review or statements posted, including those posted by employees with the Grainger employee badge, and is not liable for any losses, injuries or damages which may result from any such product review or statements. Use of any linked web site provided in a product review or post is at the user's own risk.