IRWIN makes permanent chalk in either black or red. Because it won't rub, fade or wash away, black or red chalk is perfect for use on subfloors, concrete, metal, and roofs. There is no need to polyurethane. Just snap a line, and it's set. Red, black and yellow chalks are not removable, so keep them away from finish material.
Articles in this section
- What is the process for sending an invention or idea to someone for consideration?
- What does the 'Bi-Metal' mean when referring to a utility blade?
- IRWIN Taps & Dies information:
- When would I use a tap and die set and how would I properly use them?
- When would I use a tap and die set and how would I properly use them?
- I was trying to tap a hole in aluminum with a 1/4" tap. Half of the tap broke off in the workpiece. How do I get it out?
- How do you support or validate the "3x Durability" Claim?
- Why is there a slot in the front of the end hook?
- Why the Optic-White(TM) blade color?
- What is the Diamond symbol every 19'-2" increment?
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