Buster Heavy Duty Rust and Scale Remover

Industrial Rust & Scale Remover | Buster™ 5621 Series

Heavy-Duty Rust & Scale Remover. Buster™ 5621 is a heavy-duty liquid acid concentrate engineered to remove lime, iron, and scale from hard surfaces with minimal effort. Ideal for tackling hard-water build-up on stainless steel, FRP, glass, concrete, PVC, and many other hard surfaces, this formula meets USDA requirements. Its pleasant, low-odor formula is more user-friendly than other heavy-duty scale removers and is biodegradable.

Key Features

• Removes lime, iron, and scale with minimal effort
• Effective on stainless steel, FRP, glass, concrete, and PVC
• Meets USDA requirements
• Low-odor, more user-friendly formula
• Biodegradable
• Excellent hard-surface and wall cleaner

Applications

• Removing scale and light rust
• Wall cleaning — FRP, concrete, and glass
• Stainless steel surfaces
• Hard-water build-up removal on hard surfaces
• Food-processing and USDA-regulated facilities

Why Choose Buster™ 5621

• Powerful Performance: Heavy-duty acid concentrate dissolves lime, iron, and scale that lighter cleaners leave behind.
• Surface Versatility: Safe and effective across stainless steel, FRP, glass, concrete, and PVC.
• USDA Compliant: Meets USDA requirements, making it suitable for food-processing environments.
• User-Friendly: Low-odor floral formula is more pleasant to work with than typical heavy-duty scale removers.
• Environmentally Responsible: Biodegradable formula.
• Proven Performance: Developed through KO's R&D and field testing for consistent, reliable results.

Specifications

• Physical Form: Liquid
• Color: Clear
• Fragrance: Floral
• pH (1% dilution): 1.0 – 2.0
• DOT Classification: Corrosive
• Suggested Dilution: Varies — see label

Quality & Compliance

• Manufactured by KO Manufacturing, Inc. — 2720 E Division St, Springfield, MO 65803 | 800-777-7627 | www.komfg.com
• Developed through KO's R&D and field testing, with continual lab testing for performance, effectiveness, and affordability before market release
• Meets USDA requirements; biodegradable
• Classified as Corrosive (DOT Class 8) — Signal Word: DANGER. This is a corrosive acid concentrate. Wear appropriate chemical-resistant PPE and review the SDS in full before handling.
• Refer to the Safety Data Sheet (SDS) for complete hazard, handling, storage, and first-aid information

Safety Data Sheet