Capstone™ ST-100HS
Repellent

Penetrating Sealer for Porous Surfaces
Technical Information
Description
Capstone™ ST-100HS is a cationic aqueous
fluorochemical dispersion that provides a durable, nonfilm forming, transparent protective barrier against oil andwater on porous mineral surfaces. Capstone™ ST-100HS
is a repellent used in water-based penetrating sealers fornatural stone, unglazed tile, grout, terra cotta, concrete,and brick. Capstone™ ST-100HS provides oil and water
repellency, stain resistance, and good stain cleanup.
It can also be used in cleaning and protecting productformulations.

Typical Properties
Appearance
Stability

Slightly hazy, yellow to greenish liquid
Stable at normal temperatures
Perishable if frozen

pH

3.5–5.0

Active Solids, %25Density, g/mL

1.1

Flash Point (Closed Cup), °C (°F)

Does not flash

Shelf Life

2 years

Applications and Formulating Information
Capstone™ ST-100HS is used in diluted solutions
containing 1.5–2.5% active ingredient (6–10%
commercial product) working strength with deionizedor tap water. Typical coverage rate is from 3–25 m²/Lof diluted solution, depending on the porosity of themineral substrate (thoroughly wet the surface being
treated with the diluted product, and remove excess liquid
after 15–30 min). The optimum dilution rate should bedetermined for each application. If blended, maintain pH
below 6. The product may be applied using a saturated
brush, roller, paint pad, mop, or low-pressure gardentype sprayer in one or two layers (to ensure completecoverage). A biocide should be added to formulations
made using Capstone™ ST-100HS to protect theformulation against microbial growth.

Performance
Capstone™ ST-100HS (diluted to 8% of commercial
product in water) was compared to a competitive
aqueous-based silicone sealer. Each product was applied
to limestone and Saltillo (Mexican clay tile or terracotta) and allowed to dry for three days. Corn oil, Italiandressing, ketchup, mustard, grape juice, and coffee werethen placed on the treated substrates. After 24 hr, thetiles were washed with 1% soap solution and allowed
to dry. The ratings were totaled for each tile sample.
The results below show that Capstone™ ST-100HS
outperformed the competitive aqueous-based silicone
sealer. Similar results have been achieved on other porous
mineral substrates.

Repellent

Capstone™ ST-100HS

Personal Safety, First Aid, Storage and Handling

Scoring System for Each Stain After Dry
No Visible Stain

0

Very Slight Stain

1

Light Stain

2

Moderate Stain

3

Heavy Stain/Complete Penetration of Stain into Substrate

4

Scoring System for Water/Oil Repellency

See Safety Data Sheet (SDS) for use and handlingrecommendations. Review this information with all
personnel handling Capstone™ ST-100HS. Mix well before
using. Protect from freezing.
Capstone™ Repellents and Surfactants• Deliver maximum performance• Regulatory and stewardship information is available
upon request• Are listed on TSCA inventory
Package Sizes

5—Excellent

4—Very Good

3—Good2—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

Limestone

Saltillo

Capstone™ ST-100HS

45

Silicone (aqueous)

813

Untreated

1921

Oil Repellency

Water
Repellency

Stain
Resistance

Capstone™ ST-100HS

Excellent

Excellent

Excellent

Silicone (aqueous)

Poor

ExcellentPoor to Good

Untreated

None

None

Very Poor

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

Treatment

Tote-2,205 lb (1000 kg), Drum–440 lb (200 kg),
Pail–44 lb (20 kg),
For questions regarding technical data, commercial
supply, and sampling:
Chemours Advanced Performance Materials
Technical Inquiries
Asia PacificEurope
Latin America
North America+86.400.671.6789+41.22.719.1537+55.08.0011.0728+1.866.828.7009

Regional Technical Customer Service Center, Americas
The Chemours Company
Chemours Discovery Hub
201 Discovery Boulevard
Newark, DE 19713 USA+1.866.828.7009

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-24298-1
C-11339 (6/21)