Product Overview

Summary: This Safe Operating Procedure sets out safe, consistent methods for mixing pigments into mortar on Australian construction and masonry sites. It helps your team achieve accurate colour results while controlling risks from cement dust, chemical exposure, manual handling and plant use, supporting WHS compliance and high-quality finishes on every job.

Mixing pigments into mortar is a routine task on many Australian building and civil projects, yet it carries a combination of quality, safety and environmental risks that are often underestimated. Inconsistent pigment dosing, poor dust control and ad‑hoc mixing methods can lead to colour variation across brickwork or render, rework costs, worker exposure to hazardous cement dust and chemical additives, and non-compliance with WHS obligations. This Safe Operating Procedure provides a clear, step-by-step framework for safely preparing, measuring and mixing pigments into mortar, whether on-site or in a small batching facility.

Developed for the Australian construction environment, the procedure integrates WHS risk controls with practical trade know‑how. It covers everything from pre-start checks, verification of pigment and mortar specifications, and selection of appropriate PPE, through to safe use of mechanical mixers, control of airborne dust, and environmentally responsible clean-up and waste disposal. By implementing this SOP, businesses can standardise their approach across crews and sites, protect workers from preventable injury and illness, and deliver consistent, specification-compliant mortar colour that enhances the finished project and reduces costly callbacks.

Key Benefits

• Ensure consistent mortar colour and finish across projects by standardising pigment measurement and mixing techniques.
• Reduce worker exposure to cement and pigment dusts through clearly defined engineering, administrative and PPE controls.
• Minimise manual handling and plant-related injuries with safe set-up, loading and operating procedures for mixers and material handling.
• Demonstrate compliance with Australian WHS legislation and relevant standards for hazardous substances, plant and construction work.
• Streamline training and onboarding for new workers by providing a clear, trade-focused reference for safe pigment mixing practices.

Who is this for?

• Site Supervisors
• Leading Hands
• Bricklayers
• Blocklayers
• Rendering and Plastering Tradespersons
• Construction Labourers
• Batch Plant Operators
• WHS Advisors and Safety Coordinators
• Construction Project Managers
• Quality Assurance Managers (Construction and Masonry Products)

Hazards Addressed

• Inhalation of cement and pigment dust leading to respiratory irritation and long-term health effects
• Skin and eye contact with alkaline cementitious materials and pigment additives causing burns or dermatitis
• Manual handling injuries from lifting and carrying bags of cement, sand and pigment containers
• Entanglement or crush injuries associated with rotating mixer drums, drive mechanisms and moving parts
• Slip, trip and fall hazards from spilled mortar, pigment, water and poorly managed hoses or leads
• Noise exposure from mechanical mixers and associated construction plant
• Chemical exposure to liquid colourants, admixtures or bonding agents used with pigmented mortar
• Environmental contamination from improper disposal of wash water and leftover pigmented mortar

Included Sections

• 1.0 Purpose and Scope
• 2.0 References, Standards and Legislative Requirements
• 3.0 Definitions and Terminology (Pigments, Batches, Mix Ratios, etc.)
• 4.0 Roles and Responsibilities
• 5.0 Required Plant, Tools and Materials
• 6.0 Personal Protective Equipment (PPE) Requirements
• 7.0 Hazard Identification and Risk Controls
• 8.0 Pre-Start Checks and Site Preparation
• 9.0 Verification of Mix Design and Pigment Specifications
• 10.0 Measuring and Dosing Pigments
• 11.0 Step-by-Step Mixing Procedure (Manual and Mechanical Mixing)
• 12.0 Quality Control, Test Panels and Colour Consistency Checks
• 13.0 Housekeeping, Spill Management and Waste Disposal
• 14.0 Environmental Considerations (Wash Water and Residue Management)
• 15.0 Emergency Procedures (Exposure, Spills, Equipment Failure)
• 16.0 Training, Competency and Supervision Requirements
• 17.0 Inspection, Monitoring and Review of the Procedure
• 18.0 Recordkeeping and Documentation

Legislation & References

• Work Health and Safety Act 2011 (Cth) and equivalent state and territory WHS Acts
• Work Health and Safety Regulations 2011 (Cth) and equivalent state and territory WHS Regulations
• Safe Work Australia – Managing Risks of Hazardous Chemicals in the Workplace: Code of Practice
• Safe Work Australia – Managing the Risk of Falls in Housing Construction: Code of Practice
• Safe Work Australia – Managing Noise and Preventing Hearing Loss at Work: Code of Practice
• AS 3700: Masonry structures
• AS 4773.2: Masonry in small buildings – Construction
• AS 1319: Safety signs for the occupational environment
• AS/NZS 1715: Selection, use and maintenance of respiratory protective equipment
• AS/NZS 2161 series: Occupational protective gloves
• AS/NZS 4501 series: Occupational protective clothing