Armstrong Flooring FlexStrong 1-Quart Mushroom Acrylic Premix Grout

Regular price $53.88

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Shipping calculated at checkout.

FlexStrong Premixed Acrylic Grout, 1-Quart (Mushroom)

Ready-to-use sanded acrylic grout designed for uniform color and flexible performance. Ideal for indoor vinyl flooring and tile joints, it resists stains and doesn’t require sealing.


Key Features:

  • Premixed Convenience: No mixing required—use straight from the tub for faster, cleaner installs
  • Flexible, Crack-Resistant: Formulation helps accommodate slight floor movement to minimize cracking
  • Color Consistency: Uniform mushroom shade across the floor for a professional finish
  • Low Maintenance: Stain-resistant and no sealing required for easier care
  • Versatile Joint Sizes: Suitable for 1/16-in to 1/4-in grout joints; indoor use

Specifications Table:

Specification Details
Series Name FlexStrong
Type Acrylic premix, sanded
Color/Finish Family Gray
Manufacturer Color/Finish Mushroom
Maximum Coverage Area 270 sq ft
Unit of Measure Quart(s)
Unit of Measure Quantity 1
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
Sanded/Unsanded Sanded
Sealing Required No
Stain Resistant Yes (no additive required)
Joint Widths 1/16-in, 1/8-in, 3/16-in, 1/4-in
CA Residents: Prop 65 Warning(s) Yes
Warranty None
UNSPSC 30111500

Frequently Asked Questions (FAQ):

Q: Is this grout ready to use?
A: Yes, it’s a premixed acrylic grout—no mixing required.


Q: Do I need to seal it after installation?
A: No sealing is required.


Q: What joint sizes can it be used for?
A: Compatible with 1/16-in, 1/8-in, 3/16-in, and 1/4-in joints.


Q: Where can it be used?
A: Indoor applications including bathroom floors/walls and kitchen backsplashes; not for showers, pools, patios, or garages.


Q: How soon can the floor be used?
A: Ready for light traffic in 24 hours.


A Seamless, Sophisticated Finish in Mushroom

FlexStrong’s velvety mushroom tone brings a refined, cohesive backdrop that elevates both classic and modern surfaces. The premixed acrylic formula delivers crisp lines and a smooth, sanded texture that feels tailored and intentional. Pair it with cool stone or matte porcelain to highlight pattern while keeping the palette serene. It’s the quiet luxury detail that completes a polished, high-performance space.


Choose FlexStrong Mushroom today for a clean, consistent grout line that’s ready to perform—no mixing, no sealing, less hassle.

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