OX Pro OX-P630802 8oz Standard Blue Marking Chalk Permanence 1

Some products earn their place in the toolbox by doing one simple job exceptionally well. The OX Pro 8oz Standard Blue Marking Chalk Permanence 1 is designed for tradespeople who need clean, visible chalk lines without leaving stubborn marks behind. OX’s North American product pages describe it as a 226g / 8oz standard blue marking chalk with 1-day weatherability and a permanence rating of 1, giving it the kind of temporary marking performance that suits interior work, setting out, and other jobs where lines need to be seen clearly and then removed easily.

The formula is presented as a practical, easy-to-handle refill for professional chalk reels. OX highlights its compatibility with surfaces such as wood, plasterboard, concrete, stone, and metal, making it useful across a broad range of site tasks. The same official and retailer descriptions also note that the chalk can be wiped off smooth surfaces, including drywall, which helps reduce cleanup time and can eliminate the need for priming before painting in some applications.

In day-to-day use, the packaging also matters. This product is described with a high-flow nozzle for smoother dispensing and a leak and loss-proof quarter-turn twist cap to help prevent spills and wasted chalk. A UK stockist further describes it as an easy-pour, refillable bottle with good adhesion and high visibility, making it a straightforward choice for builders, dryliners, and tradespeople who want reliable chalk line refill powder from a trusted brand.

Key Features

• Standard blue marking chalk with Permanence 1 for temporary, easy-clean line marking.

• 226g / 8oz fill size.

• 1-day weatherability for short-term marking performance.

• High-flow nozzle for smoother application into chalk reels.

• Leak and loss-proof quarter-turn twist cap to reduce spills and waste.

• Works on wood, plasterboard, concrete, stone, and metal.

• Wipes off smooth surfaces such as drywall.

• UK stockist description says it is formulated for good adhesion and high visibility.

Specifications

• Product Name: OX Pro 8oz Standard Blue Marking Chalk Permanence 1.

• SKU: OX-P630802.

• EAN: 9341231061288.

• Brand: OX.

• Product Type: Marking chalk / chalk powder refill.

• Colour: Blue / standard blue.

• Fill Size: 226g / 8oz.

• Packed Weight: 0.25kg to 254g, depending on retailer formatting.

• Permanence Rating: 1.

• Weatherability: 1 day.

• Manufacturer Warranty: 90-Day Hassle Free.

• Available in UK: Yes.

• Sub-Brand: N/A.

What’s Included

• 1 x OX Pro 8oz Standard Blue Marking Chalk bottle. ITS lists this SKU as Pack Size 1, and no additional accessories are shown on the official OX page.