Blackline - Black Permanent Marking Chalk - (Select Size)
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Blackline - Black Permanent Marking Chalk - (Select Size)
Blackline's permanent black chalk is formulated to infuse into porous surfaces like wood and concrete, so a snapped line survives wind, water and job-site traffic instead of wiping away like standard chalk. It still washes off hands and clothing with mild soap and water.
Stocked in the 8 oz. refill bottle (B1816) for topping up a chalk line box, and the 5 lb. bag (BL54) for high-volume framing crews who go through chalk fast.
Features and Common Uses
- Permanent formula infuses into wood and concrete for a line that resists wind, water and foot traffic
- Leaves a crisp line that resists smudging compared to standard chalk
- Washes off hands and clothing with mild soap and water despite the permanent line
- Available in an 8 oz. refill bottle or a 5 lb. bulk bag
Commonly used for:
- Snapping permanent layout lines on framing and sheathing
- Concrete and masonry layout lines exposed to weather
- High-volume framing crews needing a bulk refill
Specifications
| Brand | Blackline |
|---|---|
| Colour | Black |
| Formula | Permanent, waterproof, windproof |
| 8 oz. Size (B1816) | Refill bottle |
| 5 lb. Size (BL54) | Bulk bag |
| Cleanup | Washes off hands/clothing with mild soap and water |
Formula claims (waterproof, windproof, permanent-on-porous-surfaces) and the 8 oz. bottle size are as published on Blackline Manufacturing's own site. The 5 lb. bulk size (BL54) is confirmed via chalk distributors rather than Blackline's current site, which currently lists its bulk size as 4 lb. (BL46) - treat the 5 lb. bag's exact net weight as distributor-reported, not manufacturer-confirmed. Source: Blackline Manufacturing - Official Site.
Frequently Asked Questions
Is this chalk really permanent?
Yes on porous surfaces like wood and concrete - the formula infuses into the surface rather than sitting on top, so it survives wind and rain. It still comes off hands and clothing with soap and water.
Which size do I need?
The 8 oz. bottle (B1816) tops up a standard chalk line box. The 5 lb. bag (BL54) is the bulk option for a crew going through chalk regularly.
Does it work on concrete?
Yes - it's designed for wood and concrete alike.