String Chalk for Masonry MODECO MN-79-017 blue 150 g

MODECO string chalk MN-79-017 blue 150 g is a mason's chalk block formulated for marking masonry and construction lines. The chalk is suitable for filling chalk lines and snapping cords to create clear, temporary reference lines on brick, concrete, plaster and similar building surfaces. Offered in a compact 150 g format, it is designed for use on construction sites, renovation works and general layout tasks where visible, removable marks are required.

Advantages

The blue formulation produces high-contrast marks that remain visible on rough and porous surfaces while being easy to brush or wash off. The 150 g block fits standard chalk winder housings and is compatible with common mason's chalk reels. The dry, fine-grain texture reduces clogging of snapping cords and provides consistent line transfer for accurate alignment and layout work.

Suitable for

• Marking masonry and brickwork for cutting or alignment
• Creating temporary layout and guide lines on concrete and plaster
• Using with chalk line reels and snapping cords on construction sites
• Transfer of reference lines during renovation and installation tasks

Key specifications

• Colour: blue
• Weight: 150 g
• Form: solid chalk block for string/chalk line reels
• Suitable surfaces: brick, concrete, plaster and other building materials
• Mark type: temporary, brush- or wash-removable

How to use

Place the chalk block into a compatible chalk line winder or rub the block directly along a snapping cord to coat the string evenly. Stretch the cord between two anchor points at the desired alignment, pull taut and snap against the surface to leave a straight line. For best results, ensure the surface is free of loose dust and debris prior to marking. Wipe or brush away excess chalk after the layout is completed or remove marks with water if necessary.

Usage recommendations

Store the chalk block in a dry place to maintain consistent consistency and prevent hardening. Use the blue variant when higher contrast is needed on light and mid-tone masonry surfaces; test on an inconspicuous area if unsure about removability on painted or sensitive finishes.