CLR Calcium, Lime & Rust Remover — 1 Gallon concentrated professional-strength cleaner, EPA Safer Choice, fast-acting on scale and

CLR Pro Calcium, Lime & Rust Remover is a professional-strength, non-toxic liquid cleaner formulated to dissolve stubborn calcium, lime and rust deposits on a wide range of surfaces.

This concentrated 1-gallon formula from CLR is built for commercial and heavy-duty residential jobs where mineral buildup and rust interfere with appearance and performance. The EPA Safer Choice-recognized, biodegradable formula removes scale and rust without phosphates, ammonia or bleach, and is safe for use on many common materials including stainless steel, glass, tile, porcelain and fiberglass. It’s designed to work quickly yet be gentle on plumbing, grout and surrounding landscaping when used as directed.

How quickly will CLR Pro remove heavy lime and calcium scale?

CLR Pro is formulated to act fast on mineral deposits; many users see visible improvement within minutes on accessible surfaces. Dwell time depends on deposit thickness—light buildup often dissolves in under five minutes, while heavy scale may require longer contact or mechanical agitation.

• Works on fresh and aged scale, reducing scrubbing time
• Short contact times for routine maintenance
• Stronger penetration for thick deposits when allowed extra dwell time

What surfaces and equipment can I safely clean with this product?

CLR Pro is versatile and formulated for use on many hard, non-porous surfaces. It’s effective on stainless steel, ceramic tile, glass, porcelain, chrome, fiberglass, cement, brick, vinyl siding and more; avoid prolonged contact with delicate finishes and unsealed natural stone.

• Suitable for sinks, tubs, toilets, and faucets
• Use on commercial appliances: coffee machines, dishwashers, washers
• Compatible with pressure washer applications for exterior siding and concrete

Is CLR Pro safe for plumbing, grout and the environment?

The formula is engineered to be septic-safe, biodegradable and non-toxic when used as instructed, and it follows EPA Safer Choice guidelines. It’s safe on light-colored grout and general plumbing; always rinse thoroughly and test a small area before broader use.

• Septic-safe and biodegradable ingredients
• No phosphates, ammonia or bleach to harm fixtures or finishes
• EPA Safer Choice recognition and USDA 80% biobased certification

How should I use the 1-gallon container for commercial cleaning jobs?

The 1-gallon size supplies enough product for repeated jobs and is convenient for refilling spray bottles or mixing solutions for large-area cleaning. Dilution ratios vary by application—use concentrated for heavy rust and scale, and diluted solutions for routine maintenance and delicate surfaces.

• Refill smaller spray bottles or buckets for ease of use on job sites
• Use with pressure washers for siding and concrete when diluted appropriately
• Follow label directions for dwell times and rinsing to protect surfaces

Who this is for: CLR Pro 1-gallon calcium, lime & rust remover is aimed at facilities managers, hospitality and lodging teams, maintenance crews, plumbers, car-detailers and homeowners tackling persistent mineral buildup. It’s suited for anyone needing an effective, EPA-recognized cleaner in bulk—particularly those who want industrial performance with a safer chemistry profile. Always read and follow label instructions for proper dilution, surface compatibility tests and safety precautions before use.

Ingredients

See label