Armstrong Flooring FlexStrong 1-Gallon Shale Acrylic Premix Grout

Regular price $78.38

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FlexStrong Shale Acrylic Premix Grout, 1 Gallon

Ready-to-use sanded acrylic grout engineered for uniform color and crack-resistant performance. Ideal for indoor vinyl and tile installations, this premixed formula needs no sealing and cleans up easily.


Key Features:

  • Premixed Convenience: No mixing required—use straight from the pail for faster, cleaner installs
  • Crack-Resistant Flexibility: Formulated to minimize cracking with slight floor movement
  • Uniform Color: Consistent color throughout the floor for a professional finish
  • Low Maintenance: Stain resistant and no sealing required
  • Versatile Joint Sizes: Suitable for 1/16-in to 1/4-in grout joint widths

Specifications Table:

Specification Details
Color/Finish Family Black
Manufacturer Color/Finish Shale
Series Name FlexStrong
Type Acrylic premix
Sanded/Unsanded Sanded
Unit of Measure Gallon(s)
Unit of Measure Quantity 1
Maximum Coverage Area (Sq. Feet) 1080
Use Location Indoor
For Use with Bathroom Floors Yes
For Use with Bathroom Walls Yes
For Use with Kitchen Backsplashes Yes
For Use with Kitchen Counters No
For Use with Fireplace Exteriors No
For Use with Garage Floors No
For Use with Garage Walls No
For Use with Patios No
For Use with Pools No
For Use with Shower Floors No
For Use with Shower Walls No
For Use with Vinyl Floors Yes
Freeze Resistant Post Installation No
Mold Resistant Yes
Sealing Required No
Stain Resistant Yes (no additive required)
CA Residents: Prop 65 Warning(s) Yes
Warranty None
UNSPSC 30111500
Joint Width Compatibility 1/16-in, 1/8-in, 3/16-in, 1/4-in

Frequently Asked Questions (FAQ):

Q: Is sealing required after installation?
A: No. This grout is designed to be stain resistant and does not require sealing.


Q: How soon can the floor be used?
A: It’s ready for light traffic after 24 hours; allow additional cure time before heavy use.


Q: What joint widths does it support?
A: Use with 1/16-in, 1/8-in, 3/16-in, and 1/4-in joints.


Q: Where can I use it?
A: For indoor applications only, including bathroom floors and walls, kitchen backsplashes, and vinyl floors.


Q: Is mixing necessary?
A: No. It’s a premixed sanded acrylic grout—open and apply.


A sleek, modern grout that elevates every edge

FlexStrong in Shale frames surfaces with a deep, refined tone, bringing a tailored calm to contemporary rooms. The smooth, uniform color creates crisp lines that make tile patterns feel deliberate and elevated. Pair it with matte porcelain or luxury vinyl tile for a chic, gallery-quality finish. It’s a quiet luxury essential that perfects the details with effortless polish.


Upgrade your install with FlexStrong—the ready-to-use grout that delivers a flawless, durable finish.

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