HMK® R777 – Rust Remover

Professional Rust Stain Remover for Acid-Tolerant Stone

HMK® R777 is a ready-to-use specialty cleaner formulated to remove rust spots and stains from all acid-tolerant dense stone surfaces such as granite and quartzite. With its unique blend of active ingredients, this powerful rust remover not only eliminates existing rust but also contains special additives that help reduce the formation of new rust stains after treatment.

Suitable for both interior and exterior applications, HMK® R777 is trusted by stone care professionals worldwide to tackle tough rust problems while preserving the natural beauty of stone.

Key Benefits

✔ Removes Rust Stains – specifically designed to target rust on acid-tolerant dense stone.
✔ Rust Inhibiting Formula – reduces the likelihood of rust returning after treatment.
✔ Professional Strength – effective for heavy rust contamination.
✔ Interior & Exterior Use – versatile solution for multiple applications.
✔ Ideal for granite, quartzite, and other acid-tolerant stones.

⚠️ Not suitable for polished or honed marble, limestone, concrete, agglomerates, plastics, or acid-sensitive surfaces.

Recommended Uses

• Granite and quartzite countertops

• Exterior paving stones and facades

• Dense natural stone surfaces prone to rust staining

• Professional stone care projects requiring rust removal

Application Instructions

1. Ensure underfloor heating is switched off and the surface is cool to room temperature.

2. Do not pre-wet the stone before application.

3. Apply undiluted HMK® R777 generously and evenly with a scrubbing brush, stiff brush, or suitable pad.

4. Always treat the entire surface, not just spots, to avoid uneven results.

5. Keep the surface damp by covering with plastic sheeting for at least 12 hours.

6. After treatment, clean thoroughly with HMK® R155 Intensive Cleaner (acid-free) diluted 1:10, then rinse well with water.

7. For heavy rust stains, repeat the process as needed.

Technical Details

• Product Type: Rust Remover (not for polished/acid-sensitive surfaces)

• Unit Sizes: 1 Liter, 5 Liter

• Coverage: ~60–80 sq ft (1L), 300–400 sq ft (5L)

• Packaging: 12 x 1L bottles/case, 2 x 5L bottles/case

• Working Temperature: Apply between 50–80°F (10–25°C). Avoid direct sunlight.

• Storage: Store in a cool place, tightly closed.

Safety & Testing

⚠️ Contains phosphoric acid. Corrosive. Wear protective clothing, gloves, and eye protection during application. Avoid skin/eye contact and inhalation. Keep out of reach of children.
Always test HMK® R777 in an inconspicuous area before full application to confirm suitability and final results.

Why Choose HMK® R777?

Rust stains can ruin the appearance of stone surfaces, especially outdoors. HMK® R777 is the professional solution for eliminating rust from acid-tolerant stones like granite and quartzite. Its rust-inhibiting additives help protect against future staining, making it the preferred choice for both contractors and homeowners seeking long-term results.

👉 Eliminate stubborn rust stains and protect your stone with HMK® R777 – the professional rust remover for granite, quartzite, and acid-tolerant surfaces.