Sanding Masonry Patches: Control Silica at the Tool

Know the hazard

Team: Painters. Topic: Dust Control.

Sanding or grinding cement-based patches can release respirable crystalline silica. The dust that matters most may be too small to see, so a room that looks clear is not proof of adequate control. Painters can encounter this hazard while smoothing masonry, concrete repairs, or other silica-containing surfaces. Identify the substrate and task before selecting a power tool.

Use the controls

Follow the employer’s written exposure-control plan and the applicable task-specific control approach. Use the tool, shroud, extraction equipment, filters, and operating method specified for that work. A household vacuum or loose hose near the grinder is not an equivalent system. If required controls cannot be maintained, stop and obtain a suitable method; respiratory protection, when required, must be provided through the employer’s program.

Work within the safe plan

Keep other workers outside the affected area and control dust during cleanup and filter handling. Avoid dry sweeping or compressed-air cleanup that disperses dust when safer permitted alternatives are available. Report damaged shrouds, poor capture, or unexpected dust immediately. Before starting today, confirm where debris will go and how the crew will handle a full collection container without releasing its contents back into the workspace. Before the crew begins, ask someone to explain the control in their own words and point to the person responsible for confirming it. Resolve uncertainty now, while the task is still paused.

Discuss with the crew

A painter uses an unshrouded grinder to feather a large concrete patch because hand sanding takes too long.

Question: What should change before grinding continues?
Answer guidance: Use the assessed silica control method with the appropriate tool system and any required respiratory protection.

Question: Does visible dust define the full exposure?
Answer guidance: No. Harmful respirable particles may not be visible.

Prepare, act, and follow up

Leader preparation: Bring the task-specific silica plan and inspect the selected dust-control accessories without running the tool.

Put it into practice: Match today’s substrate and tool to the written plan, then identify the approved cleanup method.

Supervisor follow-up: Verify equipment compatibility, worker training, and exposure-control requirements before similar preparation resumes.

Official reference: OSHA — Respirable Crystalline Silica
https://www.osha.gov/silica-crystalline

Awareness briefing. Apply current site procedures and applicable requirements. This talk does not replace required qualification, practical training, exposure assessment, medical evaluation, or a written program.

Suggested session: 5-7 minutes, including discussion and activity. Prepared October 18, 2026; recheck current requirements before use.

Show the crew

Match today’s substrate and tool to the written plan, then identify the approved cleanup method.