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HMK R777 Rust Remover for Hard Stone
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At a Glance
Quick Decision Guide
Container Size
1 Liter
Coverage
60-80 sq ft
Stone Compatibility
Acid-Tolerant Natural Stone
Removes
Rust Spots & Stains
Future Protection
Helps Reduce New Rust Formation
Application
Ready to Use
Use Location
Interior & Exterior
Professional Use
Yes
Why Choose This Product
Key Benefits
Ready to Use
No mixing or dilution required
Rust Removal
Removes rust spots and stains from dense stone
Rust Inhibition
Special additives help reduce future rust formation
Stone Safe
Designed for acid-tolerant natural stone
Interior & Exterior
Suitable for indoor and outdoor applications
Professional Formula
Developed for professional stone restoration
Product Information
Product Details
Specifications
Brand
HMK®
Part Number
R777-1
Product Type
Rust Remover for Hard Stone
Container Size
1 Liter
Coverage
60-80 sq ft
Formula
Ready to Use
Application Type
Surface Treatment
Compatible Materials
Granite, Quartzite & Other Acid-Tolerant Dense Stone
Removes
Rust Spots & Rust Stains
Rust Inhibitors
Helps Reduce New Rust Formation
Application Area
Interior & Exterior
Professional Use
Yes
Surface Preparation
Apply to Dry Surface Only
Direct Sunlight
Do Not Apply in Direct Sunlight
Not Compatible With
Marble, Limestone, Agglomerates, Concrete Products, Plastics & Certain Metal Surfaces
Important Note
Product may temporarily darken stone if allowed to dry on the surface
About This Product
Rust Stain Remover for Acid-Tolerant Stone
HMK® R777 is a ready-to-use rust remover formulated to remove rust spots and stains from acid-tolerant dense natural stone. Its specialized formula also helps reduce the development of new rust after treatment while restoring the appearance of affected surfaces.
Compatible Stone Surfaces
R777 is designed for use on acid-tolerant materials including granite, quartzite, and other dense natural stones. It is suitable for both interior and exterior applications and is intended for professional use.
Application Guidelines and Limitations
Do not wet the surface before application and avoid using the product in direct sunlight. HMK® R777 should not be used on acid-sensitive materials such as polished or honed marble, limestone, agglomerates, concrete products, plastics, or certain metal surfaces. Allowing the product to dry on the surface may temporarily darken the stone, although this effect may reverse over time.
Common Questions
Frequently Asked Questions
What types of stains does HMK R777 remove?
HMK R777 is designed to remove rust stains from granite, quartzite, and other acid-tolerant natural stone surfaces.
Does HMK R777 need to be diluted before use?
No. HMK R777 is a ready-to-use formula that can be applied directly from the container.
Can HMK R777 be used outdoors?
Yes. HMK R777 can be used on both interior and exterior hard stone surfaces.
Can HMK R777 be used on marble or limestone?
No. HMK R777 is intended for acid-tolerant stone such as granite and quartzite and should not be used on acid-sensitive materials like marble or limestone.
Does HMK R777 help prevent rust from returning?
Yes. The formula contains additives designed to help reduce future rust formation after treatment.