Grout types and selection
There are four broad families of tile grout: cement grouts (sanded, unsanded and polymer-modified high-performance versions), reaction-resin grouts (epoxy and furan), single-component premixed grouts (urethane, acrylic and hybrid) and specialty products for industrial and chemical service. Joint width, tile surface, wetness and stain exposure decide which family fits.
If you only read one page, start with Which grout do I need? or try the grout type selector. Head-to-head matchups live in Comparisons.
Which Grout Do I Need? A Decision Guide by Joint, Tile, Room and Skill
A step-by-step way to choose between sanded, unsanded, high-performance, premixed, urethane, epoxy and specialty grout for any tile job.
Sanded Grout: When to Use It, Joint Widths and Mixing Tips
How sanded cement grout works, which joints and tiles it suits, how to mix and finish it, and where it goes wrong.
Unsanded Grout: Narrow Joints, Delicate Tile and Its Real Limits
When unsanded grout is the right call, why it fails in wide joints, and how to install it on walls, mosaics and polished surfaces.
Epoxy Grout: How It Works, Where It Pays Off and Its Limits
What epoxy grout is, why it resists stains and chemicals, where it is worth the extra effort, and the limits most buyers never hear about.
Urethane Grout: How It Cures, Where It Works and Why It Stays Soft
How ready-to-use urethane grout cures by drying, where it fits best, and the conditions that make it stay soft or haze the tile.
Premixed Grout: Types, Label Claims, Storage and Where It Fails
A buyer's and installer's guide to ready-to-use grout: the chemistries inside the pail, the label claims that matter, storage and limits.
High-Performance Cement Grout (ANSI A118.7): What It Is and When to Use It
What makes an ANSI A118.7 cement grout "high performance," how to mix and cure it, and where it beats standard grout or epoxy.
Stain-Resistant Grout: What Actually Works and What to Expect
Stain resistance comes from low absorption, not a label. Here is how each grout type earns it, its limits, and how to test a sample yourself.
Flexible Grout: What It Really Means and Where It Helps
Flexible grout tolerates small strains better than plain cement, but it is still grout. Here is what the claim means and where it earns its keep.
Specialty Grouts: Furan, Rapid-Setting, Acid-Resistant and Industrial Systems
Furan, industrial epoxy, rapid-setting and other specialty grouts: what each resists, where they are specified and why they are rarely DIY products.
Grout Standards Explained: ANSI A118 and ISO 13007-3 Classes Decoded
A plain-language decoder for the ANSI and ISO codes printed on grout bags, what each one tests and what it does not promise.
Grout Color Guide: Matching, Contrast and Colors That Last
A practical system for choosing grout color by tile, room and maintenance, plus why the color in the bag rarely matches the wall.
Explore other guides
Grout Basics
What grout is, what it does, what it cannot do, how long it lasts and how to handle it safely.
Grout Science
The chemistry and physics behind curing, shrinkage, color, porosity and strength.
Comparisons
Head-to-head matchups with side-by-side tables and a clear recommendation.
Joint Width and Layout
How wide and deep grout joints should be, and where grout must stop for movement joints.
Grout by Tile Type
Grout choice, joint width and pitfalls for each tile material.
Grout by Location
Where the tile lives changes the right grout: wet, hot, outdoor, submerged or commercial.
How to Grout
Mixing, floating, sponging, haze removal and curing, done the way pros do it.
Grout Problems
Symptom-first diagnosis: what you see, what causes it and how to fix it.
Repair and Regrouting
Patch, remove and regrout correctly, and know when the problem is below the grout.
Cleaning and Stains
Safe cleaning methods, the right chemistry for each soil, and stain-by-stain fixes.
Sealing Grout
Which grouts need sealing, which sealer to use, how to apply it and how to test it.
Grout Tools
Calculators and interactive tools for planning, buying and troubleshooting grout.
Research and Data
Original reference tables and analysis computed from first principles.