Polymer-modified grout is cement grout with polymers added to boost strength, flexibility, and water resistance. Compared with standard grout, it bonds better, resists cracking and shrinking, and holds up to moisture, which makes it a strong all-around choice for both residential and commercial tile.

How the polymers help

The polymers act as a binder throughout the joint. That gives the cured grout more tensile strength and a bit of flexibility, so it tolerates minor movement instead of cracking, and it reduces the shrinkage and pinholing that plague basic grout.

Key benefits

• Higher strength and better adhesion
• More flexibility, so it resists cracking
• Improved water and stain resistance
• Less shrinkage for a fuller, more consistent joint
• Uniform color across the installation

Polymer-modified vs standard grout plus admix

You can boost a standard grout by mixing in a liquid latex admix, but a polymer-modified grout has that performance built in, straight from the bag. It removes a mixing variable and gives more consistent results, which is why many installers prefer it for demanding jobs.

Where to use it

Polymer-modified grout is a smart default for floors, showers, backsplashes, and commercial work, anywhere you want durability and moisture resistance without stepping up to a full epoxy system.

SGM products

See Security Polymer Grout for a durable, polymer-modified joint. Prefer to modify a standard grout yourself? Use Security Grout Admix Plus. Learn more in our guide to grout additives.