Keson 8 oz. Blue ProChalk Standard Grade Marking Chalk

The everyday classic for clean, reliable layout lines. This pocket-friendly 8 oz bottle of Blue ProChalk snaps crisp, easy-to-see marks on wood, concrete, and sheathing—perfect for punch lists, trim work, and quick layout tasks. The standard-grade, finely milled formula feeds smoothly, coats evenly, and typically wipes or rinses away when the job’s done.

Key Features

• Worksite-standard blue color: Balanced indoor/outdoor visibility without being overly bold.
• Standard/removable grade: Temporary marks that usually clean off with a wipe or rinse (always test first).
• Finely milled formula: Smooth flow through reels for sharp, consistent snaps and less clogging.
• Pocket-sized 8 oz bottle: Ideal for service calls and small-to-mid projects; easy to carry and refill.
• Universal compatibility: Works with most chalk line reels from major brands.
• Clean refill design: Resealable cap/pour spout helps prevent spills and caking.
• Jobsite versatility: Reliable on wood, concrete, drywall, OSB/plywood, and subfloor sheathing in dry conditions.

Brand/Model: ProChalk Standard Grade, Blue

Product Type: Marking chalk powder for chalk line reels

Color: Blue (worksite-standard visibility)

Material: Finely milled calcium carbonate with inert pigments and flow/anti-caking additives

Form: Dry powder

Weight (Net): 8 oz (0.5 lb / ~227 g)

Dimensions (Container): ~6 × 2.5 × 1.5 in (approx.; varies by packaging)

Container Type: Resealable plastic squeeze bottle with pour spout

Compatibility: Standard chalk line reels (most major brands)

Surface Suitability: Wood, concrete, drywall, OSB/plywood, subfloor sheathing (best in dry conditions)

Permanence: Standard/removable; typically wipes or rinses off (always test first)

Mark Visibility: Balanced indoor/outdoor visibility; crisp, easy-to-see lines

Primary Use Cases: Punch lists, trim work, small-to-mid projects, framing/layout, roofing, masonry

Operating Conditions: Use in dry weather for best adhesion; re-snap after moisture if needed

Storage: Keep sealed and dry; avoid humidity to prevent clumping

Safety Notes: Avoid inhalation/eye contact; basic dust precautions recommended

Country of Origin: Varies by batch (check product label)

Manufacturer Part Number (MPN): Varies by supplier (commonly listed as ProChalk Blue 8 oz)

Q: Is the blue chalk permanent or removable?
A: It’s standard/removable. Marks typically wipe or rinse away; always test first on porous or finished surfaces.

Q: When should I choose the 8 oz bottle instead of a 5 lb jug?
A: The 8 oz size is perfect for punch lists, trim work, service calls, and small-to-mid projects—easy to carry, quick to refill reels, and less waste for light use.

Q: What surfaces and conditions give the best results?
A: Dry wood, concrete, drywall, OSB/plywood, and subfloor sheathing in dry weather. Moisture or heavy dust can reduce adhesion; re-snap lines as needed.

Q: Any tips to avoid mess and make cleanup easier?
A: Don’t overfill the reel, keep the cap closed, snap on clean, dry surfaces, and clean soon after use—start with a dry brush, then a damp cloth if residue remains.