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Irwin Strait-Line 4 lb Permanent Marking Chalk Indigo Blue

Permanent staining chalk that holds its line through rain, sun, and rough outdoor job sites.
Irwin MPN 4935524 In Stock & Ready to Ship
$25.99
Free shipping on orders over $75
Ships within 24 hours · most orders arrive in about 2 business days

About Product Overview

This IRWIN Strait-Line marking chalk is formulated to stay put, even when the job site doesn't cooperate. It's a permanent chalk, built for staining lines that need to survive rain, sun, and everything else an outdoor job throws at them, rather than washing away before you get to the cut or the layout mark. The 4 lb size keeps your chalk line reservoir stocked through repeated refills, and the indigo blue color shows up clearly against most surfaces.

  • Brand: IRWIN, Strait-Line sub-brand
  • Chalk type: Permanent
  • Color: Indigo Blue
  • Net weight: 4 lb
  • 1 container per package
  • Rated for extreme outdoor conditions

The Details Specifications

Brand Irwin
Model / MPN 4935524
UPC 024721999320
Weight 4 lbs
Safety Data Sheet (SDS) Manufacturer documentation · opens in new tab
Price check

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On Amazon, start with these four questions before you click buy.

01

Who's actually selling it

The brand name is on the listing. A different company is in the seller field. Those aren't the same thing, and the second one is who you're buying from.

02

Whether the warranty survives

Most manufacturers only honor a warranty when the unit came through an authorized dealer. We're authorized for Irwin. A third-party marketplace seller usually isn't.

03

Where the box came from

Gray-market stock, returns repackaged as new, and outright fakes move through marketplaces constantly. It all looks identical in the photo. It stops looking identical when it fails.

04

Who you call when it breaks

Ours is a phone number with a person behind it who has held this product. M–F, 6 AM – 5 PM Pacific. (866) 469-8556

The big boxes don't care if your hardware store survives.

Amazon, Home Depot, and Lowe's are built to pull every hardware dollar out of your town. When the local shop can't keep the lights on, the counter where somebody actually knew which part you needed goes with it. We're built the other way: real brands so you're never stuck on a marketplace, and a straight answer to buy it down the street when that's the better call. Support independent hardware — it doesn't restock itself.

Why we tell you to shop local
Authorized dealer · Irwin

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