Keson ProChalk Permanent – Blue (Level-4)

The blue variation of the ProChalk Permanent line uses a deep blue pigment to deliver long-lasting layout and marking lines outdoors — providing both durability and visibility across concrete, metal and masonry surfaces.

• Same high-durability formula as the other Permanent colour variants — engineered to hold up to weather, water and heavy duty conditions.
• Good contrast on light-coloured surfaces (like light concrete or metal) where red might be less visible.
• Reliable for marking where lines must remain visible for extended construction phases.

Ideal for exterior concrete layout, metal fabrication floor marking, infrastructure site plans, roofing layout, and other large-job applications.

• Colour: Blue
• Permanency: Permanent grade — category for long-term use.
• Typical sizes: “PM8BLUE” (8 oz) and “PM105BLUE” (3 lb) variants available.