Capstone™ ST-110
Repellent

Penetrating Sealer for Porous Surfaces
Technical Information

Typical Properties

Description

Stability

Capstone™ ST-110 is a cationic aqueous fluorochemical
dispersion that provides a durable, non-film forming,
transparent protective barrier against oil and water on
porous mineral surfaces. Capstone™ ST-110 is used inwater-based penetrating sealers, especially for naturalstones, unglazed tile, grout, terra cotta, concrete,and brick. Capstone™ ST-110 provides oil and water
repellency, stain resistance, and easy stain cleanup.
Applications and Formulating Information
Capstone™ ST-110 is used in diluted solutions containing
1.5–2.5% active ingredient (6–10% commercialproduct) working strength with deionized or tap water
for appropriate application levels. 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.
If blended, maintain pH below 6. The product may be
applied using a saturated brush, roller, paint pad, mop, or
low-pressure garden-type sprayer in one or two layers (toensure complete coverage). A biocide should be added toformulations made using Capstone™ ST-110 to protect
the formulation against microbial growth.

Appearance

Clear, yellow liquid
Stable at normal temperatures
Perishable if frozen

pH

4.0–6.0

Active Solids, %25Density, g/mL

1.1

Flash Point (Closed Cup), °C (°F)

Does not flash

Shelf Life

2 years

Performance
Capstone™ ST-110 (diluted to 8% of commercial productin water) was compared to a competitive aqueous-based
silicone sealer. Each product was applied to limestone
and Saltillo (Mexican clay tile or terra cotta) and allowed
to dry for three days. Corn oil, Italian dressing, ketchup,mustard, grape juice, and coffee were then placed on thetreated substrates. After 24 hr, the tiles were washedwith a 1% soap solution and allowed to dry. The ratings
were totaled for each tile sample. The results below showthat Capstone™ ST-110 outperformed the competitive
aqueous-based silicone sealer. Similar results have beenachieved on other porous mineral substrates.

Repellent

Capstone™ ST-110

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. Mix well before using. Protect fromfreezing.

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—Fair1—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-110

35Silicone (aqueous)

813

Untreated

1921

Oil Repellency

Water
Repellency

Stain
Resistance

Capstone™ ST-110

Excellent

Excellent

Excellent

Silicone (aqueous)

Poor

Excellent

Poor to Good

Untreated

NoneNoneVery Poor

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

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 Pacific
EuropeLatin 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 discretionand 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.

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Replaces: K-23804-2C-11340 (6/21)