Select Your Region
- Manufacturer: Chemours
- Product Line: Capstone™ Fluorosurfactants
- Product: Capstone™ Repellents for Stone & Tile
- Industries: Coatings | Energy
- Authorized Countries: Canada | United States
Capstone™ ST-500
As of early 2025, Chemours Capstone™ has been discontinued, and ChemPoint is committed to helping customers find alternatives. We offer Momentive CoatOSil™ and Silquest™, silicone-based surface-modifying additives, and ICT Thetawet™, Thetaguard™, and Thetapel™ fluorosurfactants and fluoropolymers. Contact us, and one of our technical experts will assist you in finding the closest option for your formulation.
Capstone™ ST-500 is a water-based, high-performance fluoropolymer used as the active ingredient in penetrating sealers for acid-sensitive porous mineral surfaces. It provides a durable protective barrier to oil, water, and stains.
Quantity
Documents
Specifications
Appearance: Colorless to amber liquid
Freeze–thaw stability: Stable at normal temperatures; perishable if frozen
pH: 9–11
Active solids (%): 25
Density (g/mL): 1.1
Flash point, closed cup: Not flammable
Boiling point, °C (°F): ~100 (~212)
Freezing point, °C (°F): ~0 (~32)
Shelf life: 2 years
Primary Chemistry:
Fluorochemical Dispersion
- Manufacturer: Chemours
- Product Line: Capstone™ Fluorosurfactants
- Product: Capstone™ Repellents for Stone & Tile
- Industries: Coatings | Energy
- Authorized Countries: Canada | United States
Manufacturer
Product Line
Authorized Countries
Canada
United States
Overview
Capstone™ ST-500 is a water-based, fluorochemical dispersion designed to be used as a repellent in VOC-free penetrating sealers for stone, unglazed tile, grout, terra cotta, concrete, granite, brick, and more. Capstone™ ST-500 provides a durable, non-film-forming, protective barrier to oil and water that improves stain resistance and allows for easy cleanup. It has far superior oil repellency and stain resistance compared to common silicone-based sealers.
Capstone™ ST-500 should be diluted to 1.5%–2.5% actives with deionized water and can be applied with a brush, mop, roller, or sprayer, including aerosol spray cans. The surface being treated should be thoroughly wetted and allowed to dry at ambient temperature for 15 to 30 minutes. The excess liquid should then be removed.
Capstone™ ST-500 is approved only for indoor use.
All samples and purchases of Capstone for new projects and applications must first be evaluated for approval by ChemPoint and Chemours.
Specifications
Appearance: Colorless to amber liquid
Freeze–thaw stability: Stable at normal temperatures; perishable if frozen
pH: 9–11
Active solids (%): 25
Density (g/mL): 1.1
Flash point, closed cup: Not flammable
Boiling point, °C (°F): ~100 (~212)
Freezing point, °C (°F): ~0 (~32)
Shelf life: 2 years
Primary Chemistry:
Fluorochemical Dispersion
Features & Benefits
- Provides durable protection from staining
- Imparts superior oil and water repellency
- Retains the natural appearance of stone, tile, concrete, and masonry
- Allows substrate to breathe and is not film forming
- Easy to clean and maintain
- Complies with REACH requirements
- Listed on TSCA inventory
- Can be used in aerosol spray cans
Problems Solved
Sensitivity of stone or tile surfaces to acidic penetrating sealers
Damage to surfaces caused by exposure to water or oils
Staining of porous stone or tile surfaces
Applications
Water-based penetrating sealers
Related Applications
Related Chemistries
Coatings
Related Functions
Capstone™ Fluorosurfactants Articles
Chemours Capstone® LCPFAC & SNUR Regulations
Capstone® fluorosurfactants & fluororepellents were some of the first short-chain alternatives commercialized so Chemours has lots of experience helping their customers reformulate.
Chemours Zonyl® To Capstone™
Capstone™ fluorosurfactants and repellents were introduced as sustainable replacements that meet the goals of the U.S. EPA 2010/15 PFOA Stewardship Program. They are based on short-chain molecules that cannot break down to PFOA or PFOS in the environment.
ChemPoint is here to help
Are you in the correct region?
We’ve detected that you are located in a different region than the region selected on the website. Would you like to change your region?
Current Region: English - United States
