Capstone™ ST-300 is used as a water-based active ingredient in penetrating sealer for acid-sensitive mineral based surfaces. It provides outstanding oil and water repellency and excellent stain resistance.
Capstone™ ST-300 is a water-based, anionic fluorochemical dispersion that serves as the active ingredient in VOC free penetrating sealer for stone, unglazed tile, grout, concrete, and brick. Capstone™ ST-300 has a slightly alkaline pH and provides a durable, non-film forming, protective barrier to oil and water of acid sensitive surfaces. When compared to silicone based sealers Capstone™ ST-300 provides superior oil repellency and stain resistance.
Capstone™ ST-300 should be diluted to 1.5-2.5% actives and applied using a brush, roller, or mop. It should never be spray applied. The surface being treated should be thoroughly wetted and allowed to dry for 15-30 min. Excess liquid should then be removed.
Capstone™ ST-300 is only approved for indoor use.
Appearance: Colorless to yellow liquid
Stability: Stable at normal temperatures. Perishable if frozen. Viscosity may increase with time or cold storage
pH: 7.5–9
Active Solids, %: 14
Density, g/mL: 1.1
Flash Point (Closed Cup), °C (°F) Not flammable
Boiling Point, °C (°F) ~100 (~212)
Freezing Point, °C (°F) ~0 (~32)
Shelf Life: 2 years
Spray: Do not spray
Durable protection from staining
Superior oil and water repellency
Retains the natural appearance of stone, tile, concrete or masonry
Allows substrate to breathe (non-film forming)
Easy to clean and maintain
Preserves the beauty of natural stone and tile
Is in compliance with REACH requirements
Is listed on TSCA inventory
Staining of mineral based surfaces such as counter tops by food, beverage, and condiments.
Acid sensitivity of stone and tile materials used in building and construction applications.
Capstone™ ST-300 is a repellent used in water-based penetrating sealers for stone, unglazed tile, grout, terra cotta, concrete, and brick.
Capstone® fluorosurfactants & fluororepellents were some of the first short-chain alternatives commercialized so Chemours has lots of experience helping their customers reformulate.
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.
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