Stanley 47-828 Fatmax Xtreme 5LB Waterproof Black Chalk

The Stanley 47-828 Fatmax Xtreme 5LB Waterproof Black Chalk is designed for dependable performance in demanding environments. Whether you’re marking on damp concrete, wet lumber, or exposed outdoor surfaces, this waterproof chalk resists fading and bleeding—keeping your lines visible in all weather conditions. Its non-clumping formula ensures a smooth, consistent flow inside chalk reels, reducing jams and downtime on site. The square, easy-pour bottle helps prevent rolling and spilling, making it practical for jobsite use.

Perfect for use in high-traffic or outdoor areas, this black chalk delivers bold, sharp lines that stand out against light and uneven surfaces. Its 5-pound bulk size supports long-term use, minimizing the need for frequent refills—ideal for busy contractors and professional crews. This is a solid choice for framing, masonry, concrete layout, or any line-marking work where precision and visibility matter.

Stanley Fatmax Xtreme 5LB Waterproof Black Chalk At a Glance

• Waterproof formula: Won’t fade or bleed in wet conditions, making it reliable for outdoor or damp environments
• Clump-resistant design: Prevents clogging in chalk reels for smooth, continuous marking
• Square-shaped bottle: Resists rolling off tables or uneven jobsite surfaces, reducing waste and spills
• Easy pour spout: Allows fast, controlled refills without mess
• Bold black color: Creates high-contrast lines ideal for layout on lighter or rough materials
• Standard permanence: Suitable for temporary to semi-permanent applications where chalk visibility matters

Markets

• Construction: Used for framing, foundations, or layout lines on job sites exposed to weather
• Concrete & Masonry: Great for marking forms or layout lines on concrete and block in wet or humid environments
• Roadwork & Municipal: Holds up in changing weather conditions for marking curbs, pavement, or infrastructure layouts
• Educational & Trade Training: Reliable visibility for outdoor projects or wet training scenarios at trade schools
• Carpentry & Framing: Ideal for roofers and framers needing long-lasting, high-contrast marks
• Surveying & Layout: Used for accurate reference lines during fieldwork and long-distance layout marking
• Outdoor Maintenance Crews: Helps create clear layout markings for fencing, landscaping, or trail maintenance

Built for contractors who work in the rain, around moisture, or in coastal climates, the Stanley Fatmax black chalk keeps visibility high without smearing or washing away. For concrete formers, roadwork crews, and framers, it helps prevent costly layout mistakes by staying put. Municipal workers and trades educators also benefit from its clean application and long-lasting marks in unpredictable environments.

Stanley 47-828 Fatmax Xtreme 5LB Waterproof Black Chalk Features

• Waterproof chalk will not fade or bleed in a wet environment
• Eliminates chalk clumping inside the chalk reel
• Square bottle will not roll off of work surfaces

Stanley 47-828 Fatmax Xtreme 5LB Waterproof Black Chalk Specifications

• Chalk Color: Black
• Permanence: Standard
• Weight: 2.46 kg (Net) / 2.455 kg (Gross)
• Bottle Size: 5LB (2.27 kg)
• Dimensions: 30 cm (L) x 20 cm (W) x 11 cm (H)
• CE Marked: Yes
• Belt Clip: No
• Easy Pour Bottle: Yes
• Number of Pieces: 1
• Is it a Set?: No

Why Tradespeople Choose the Stanley Fatmax Xtreme 5LB Waterproof Black Chalk

Pros count on waterproof chalk like the Stanley 47-828 Fatmax for high-visibility lines that won’t quit, even in wet and unpredictable conditions. Whether you’re snapping chalk lines on fresh concrete or working in the rain, this black chalk stays where you put it. With phrases like “non-clumping chalk” and “fatmax black chalk” being common in search terms, this product meets demand from professionals looking for tough, weather-resistant marking options that save time and increase jobsite accuracy.