White Dry Non-Sanded Grout is a polymer-modified, Portland cement dry grout used for joints up to 1/8 in. (3 mm) wide. Excellent for highly-glazed ceramic tile or highly-polished marble or natural stone that can be scratched by sanded grouts. For use on interior or exterior floors and walls. It's non-shrinking and durable. Polymer-modified for strength, just add water. Meets ANSI A118.6 specifications.