Capstone™ ST-200
Repellent

Penetrating Sealer for Porous Surfaces
Technical Information
Description

Typical Properties

Capstone ST-200 is a solvent-based fluorochemical
dispersion that provides a durable, non-film forming,
transparent protective barrier against oil and water on
porous mineral surfaces. Capstone™ ST-200 is a repellent
used in solvent-based penetrating sealers, especiallyfor low-porosity stone, unglazed tile, grout, terra cotta,
concrete, and brick. Capstone™ ST-200 provides oil andwater repellency, stain resistance, and easy stain cleanup.

AppearanceColorless to light pale liquid

Stability

Product gels below 0 °C (32 °F)™

Applications and Formulating Information
Capstone™ ST-200 is used in diluted solutions containing
0.7–1.7% active ingredient (2–5% commercial product)
for appropriate application levels. Capstone™ ST-200 issoluble in most hydrocarbons (e.g., heptane, white spirits,isoparaffins), alcohols, esters, and ketones. Optimum
performances can be achieved by using a polar, proticsolvent, such as isopropyl alcohol. Typical coverage rateis from 3–25 m2/L of diluted solution, depending on
the porosity of the mineral substrate. Thoroughly wet
the surface being treated with the diluted product, andremove excess liquid after 15–30 min. The optimum
dilution rate should be determined for each application.
The product may be applied using a saturated brush,roller, paint pad or mop in one or two layers (to ensurecomplete coverage).

Product is freeze/thaw stable
Active Solids, %35

Solvent, %65 (N-Butyl Acetate)

Density, g/mL

0.968

Flash Point (Closed Cup), °C (°F)

28 (82)

Boiling Point, °C (°F)

120 (248)

Shelf Life

2 years,

Performance
Capstone™ ST-200 (diluted to 5% of commercial productin solvent) was compared to a competitive solvent-based
silicone sealer. Each product was applied to limestone aswell as Saltillo tile (Mexican clay tile or terra cotta) andallowed to dry for three days. Corn oil, Italian dressing,ketchup, mustard, grape juice, and coffee were thenplaced on the treated substrates. After 24 hr, the tiles
were washed with a 1% soap solution and allowed to dry.
The ratings were totaled for each tile sample. The results
below show that Capstone™ ST-200 outperformed thecompetitive solvent-based silicone sealer. Similar results
have been achieved on other porous mineral substrates.

Repellent

Capstone™ ST-200

Personal Safety, First Aid, Storage and Handling

Scoring System for Each Stain After Dry

See Safety Data Sheet (SDS) for use and handlingrecommendations. Review this information with all
personnel handling Capstone™ ST-200. Mix well beforeusing.

No Visible Stain

0

Very Slight Stain

1

Light Stain

2

Moderate Stain

3

Capstone™ Repellents and Surfactants

Heavy Stain/Complete Penetration of Stain into Substrate

4• Deliver maximum performance• Regulatory and stewardship information is available
upon request

Scoring System for Water/Oil Repellency• Are listed on TSCA inventory
Package Sizes
Pail–88 lb (40 kg)

5—Excellent

4—Very Good

2—Fair

1—Poor0—Penetration

5 Contact angle 100–120°

4 Contact angle 75–90°

3 Contact angle 45–75°

2 Contact angle 25–45°

1 Contact angle 10–25°

0 Contact angle <10°

Performance Comparison
24 hr Stain Scores of Six Stains
Treatment

For questions regarding technical data, commercial
supply, and sampling:
Chemours Advanced Performance Materials
Technical Inquiries
Asia PacificEuropeLatin America
North America+86.400.671.6789+41.22.719.1537+55.08.0011.0728+1.866.828.7009

Limestone

Saltillo

Capstone™ ST-20022

Regional Technical Customer Service Center, Americas

Silicone (solvent)1211

Untreated

1921

Oil Repellency

Water
Repellency

StainResistance

The Chemours Company
Chemours Discovery Hub
201 Discovery Boulevard
Newark, DE 19713 USA+1.866.828.7009

Capstone™ ST-200

Excellent

Excellent

Excellent

Silicone (solvent)

Poor

Excellent

Poor to Good

Untreated

NoneNone

Very Poor

Cumulative scale from 0 (best) to 24 (worst).
Lower score = Higher performance

Treatment

For more information, visit www.chemours.com/capstone
CAUTION: Do not use or resell Chemours™ materials in medical applications involving implantation in the human body or contact with internal body fluids or tissues unless agreed to by Seller in a writtenagreement covering such use. For further information, please contact your Chemours representative. For medical emergencies, spills, or other critical situations, call (866) 595-1473 within theUnited States. For those outside of the United States, call (302) 773-2000.
The information set forth herein is furnished free of charge and based on technical data that Chemours believes to be reliable. It is intended for use by persons having technical skill, at their own discretion
and risk. The handling precaution information contained herein is given with the understanding that those using it will satisfy themselves that their particular conditions of use present no health or safety
hazards. Because conditions of product use are outside our control, Chemours makes no warranties, express or implied, and assumes no liability in connection with any use of this information. As with any
material, evaluation of any compound under end-use conditions prior to specification is essential. Nothing herein is to be taken as a license to operate under or a recommendation to infringe any patents.
NO PART OF THIS MATERIAL MAY BE REPRODUCED, STORED IN A RETRIEVAL SYSTEM OR TRANSMITTED IN ANY FORM OR BY ANY MEANS ELECTRONIC, MECHANICAL, PHOTOCOPYING, RECORDING OR OTHERWISEWITHOUT THE PRIOR WRITTEN PERMISSION OF CHEMOURS.

© 2021 The Chemours Company FC, LLC. Capstone™ is a trademark of The Chemours Company FC, LLC. Chemours™ and the Chemours Logo are trademarks of The Chemours Company.
Replaces: K-20096-3
C-11341 (6/21)