OX Pro Red Chalk Refill 226g
The OX Pro red chalk refill is a 226g (8oz) bottle of marking chalk for chalk line reels. Red chalk is the choice for low light conditions and dark surfaces, where a white or yellow line is hard to see. It is also used to show layout changes and corrections on top of an existing line, and it works indoors and outdoors with a stated weatherability of 1 week.
Key Features
- Ideal for low light conditions and use on dark surfaces
- Use to show layout changes and corrections
- Indoor and outdoor applications
- Weatherability of 1 week
- 226g (8oz) refill bottle
Specifications
- Size: 226g (8oz)
- Colour: red
- Use: chalk line reels
- Applications: indoor and outdoor
- Weatherability: 1 week
Applications
- Marking lines on dark roofing and cladding
- Laying out in low light conditions
- Marking corrections and layout changes
- General marking on site
What You Need To Complete The Job
Load the refill into an OX Pro chalk reel for snapping lines, and keep the yellow marking chalk for bright surfaces. The marking range and the rest of the kit are under General Hand Tools.
Frequently Asked Questions
Does red chalk wash off surfaces?
Red chalk marks cleanly on most surfaces and wipes off smooth materials easily. On porous surfaces like raw timber or brick it can leave a faint stain, so test on an off cut first if the finish matters. It is rated to last about a week outdoors, so mark out close to the work, and it cleans off most painted and sealed surfaces with a damp cloth when the job is done.
How do I refill a chalk reel?
Open the refill bottle, pour the chalk into the reel through the fill opening, and replace the cap. The chalk coats the line as it winds out, so you are ready to snap lines straight away.
Why choose red chalk?
Red chalk stands out on dark surfaces and in low light where white chalk disappears. It is the colour to use on dark roofing, cladding and timber, and for marking a correction over an existing line.
How long does the line last outdoors?
OX states the chalk has a weatherability of 1 week outdoors. In dry conditions the line stays visible for days; rain and heavy traffic will wear it faster, so mark out as close to the work as practical.
Is this chalk suitable for indoor marking?
Yes, red chalk works indoors and outdoors. On indoor surfaces it marks cleanly and is easily wiped off most smooth materials when the job is done.




