IRWIN Strait-Line Marking Chalk, Permanent Staining, Midnight Black, 4 Lbs

IRWIN Strait-Line Marking Chalk, Permanent Staining, Midnight Black, 4 Lbs

Marsoni

M251S

$17.95

Get it in 3 business days with 1 day shipping. Friday, May 29

IRWIN Strait-Line Marking Chalk, Permanent Staining, Midnight Black, 4 LbsIRWIN STRAIT LINE has manufactured chalk reels designed with the end user in mind for more than 50 years. The new expanded chalk reel range features larger chalk fill openings designed for ease and speed and delivers best in class line strength and reel durability to hold up to jobsite wear and tear. Features Reduces need for additional sealant Hi Flow Nozzle Cap: For improved chalk flow, quicker chalk fills, and less clumping Withstands months of

Easy Shipping

Quick Dispatch:

Your IRWIN Strait-Line Marking Chalk, Permanent Staining, Midnight Black, 4 Lbs orders ship within 1-2 business days.

Delivery Options:

Standard: 3-7 business days
Fast: 2-3 business days
Express: 1-2 business days

Order Tracking:

You'll receive a tracking link by email once your IRWIN Strait-Line Marking Chalk, Permanent Staining, Midnight Black, 4 Lbs ships.

Need Help?
Questions about IRWIN Strait-Line Marking Chalk, Permanent Staining, Midnight Black, 4 Lbs, sizing, or delivery? We're just an email away.

Live Shipping Estimates:
Enter your location at checkout to see available shipping methods and costs for IRWIN Strait-Line Marking Chalk, Permanent Staining, Midnight Black, 4 Lbs in your area.

Get Shipping Estimates

Country Zip/Postal Code

Exchange/Return Notes

We offer a 30-day return/exchange service after receiving.
Final sale items are not eligible for returns or exchanges.
To process your return/exchange, please contact us at [email protected]
Please click here for more details>>> Return & Exchange Policy

This works really well! I used it several times and really saw a difference. Unfortunately I had a root canal done and the following day I decided to whiten and I thought I was going to die! I didn’t know my front tooth was going to be that sensitive from the tooth canal. That was my fault and only telling this story as a warning! Do not use this after dental work unless your dentist says ok! Otherwise it works amazingly!

WAS THIS REVIEW HELPFUL?YesReportShare

Reviewed in the United States on May 2, 2026

Verified Purchase

Zero

Omaha, US

★★★★★ 4

Easy to use

Size: 4 Count (Pack of 1)

Continued use is needed for best results

WAS THIS REVIEW HELPFUL?YesReportShare

Reviewed in the United States on May 14, 2026

Verified Purchase

Nicole

Belleville, US

★★★★★ 5

No sensitivity issues and works!

Size: 4 Count (Pack of 2)

I have what I would consider sensitive teeth and this doesn’t bother them one bit. I have used nightly for about 5 nights and can see a difference in color but again, no pain or sensitivity problems! I would recommend to anyone who asks what product to get for whitening teeth.

WAS THIS REVIEW HELPFUL?YesReportShare

Reviewed in the United States on February 25, 2026

Verified Purchase

Julian Barrett

Bozeman, US

★★★★★ 5

Impressive work...

I've used those whitening kit and it's my first time with something like this. I've done the charcoal toothpaste and working toothpaste and they made small changes to my teeth over a long period of time, but the whitening kit was a bit different. I applied the gel on my teeth and used the LED mouthpiece. There was a small change and a bit of sensitivity in my teeth so I waited a few days for the pain to reduce. I didn't realize that the sensitivity feel for for that very purpose. After a few days I applied another coating and used the sensitivity gel. The results were significant my teeth were two chart shades different. I was very impressed. I would recommend this for whitening your teeth, but if you feel a bit of sensitivity after use, use the sensitivity gel and red light setting on the mouthpiece. It really does help.

WAS THIS REVIEW HELPFUL?YesReportShare

Reviewed in the United States on February 7, 2026