Marshalltown M621 Yellow Mason's Line 76.2m (250ft) Twisted Nylon Bricklayers Line

Buy the Marshalltown M621 76.2m (250ft) Fluorescent Yellow Mason's Line at Ace Line Plant Ltd. High-visibility professional No. 18 twisted nylon line heat-set for shape retention. Weatherproof, rot-proof, and highly resistant to mortar, water, and oil. Perfect for high-accuracy bricklaying, site layout, and landscaping. Fast shipping available.

Overview

Ensure flawless alignment and ultimate site safety with the high-visibility Marshalltown M621 Yellow Mason's Line. Packed with 76.2 metres (250 feet) of premium No. 18 string line, this vibrant fluorescent yellow cord is a vital asset for commercial bricklayers, groundworkers, and precision landscapers working in challenging site conditions.

Made from 100% heavy-duty twisted nylon yarn, the M621 undergoes an advanced heat-setting process during production. This ensures the line maintains its structural memory, eliminating sag or elasticity under heavy tension over long spans. The brilliant neon yellow finish offers outstanding contrast against dark soils, gray bricks, wet mortar, and shadows. Completely immune to rot, mildew, water absorption, and mortar chemicals, it remains perfectly taut and highly visible from dawn until dusk.

Key Features & Benefits

High-Visibility Fluorescent Yellow: Neon finish provides maximum visual clarity, minimizing accidental trips and ensuring razor-sharp tracking on busy sites.
Premium Heat-Set Nylon: Stabilized under heat treatment to retain shape and prevent stretching or sagging under high-tension loads.
Rugged No. 18 Gauge Build: Tough, heavy-duty line weight designed to resist abrasive edges, trowel striking, and rough job site handling.
100% Waterproof Performance: Repels moisture completely, ensuring the line won't slacken, grow heavy, or distort during heavy rain or humid conditions.
Job Site Chemical Resistance: Fully protected against degradation caused by constant exposure to harsh wet concrete, masonry mortar, oils, and mud.
Multi-Trade Utility: Ideal for establishing straight guidelines in bricklaying, block work, excavation marking, landscaping, and concrete formwork.

Specifications