Ultracolor Plus with DropEffect™ technology is an ultra premium, fast-setting, polymer-modified, color-consistent, non-shrinking, efflorescence-free grout for joint widths from 1/16" to 1" (1,5 mm to 2,5 cm). DropEffect technology reduces surface absorption to help repel water, dirt and grime from penetrating grout joints. Ultracolor Plus is specially formulated with MAPEI’s High-Hydrated Cement Technology (HCT™) to eliminate the common problems related to Portland-cement grout, such as color consistency and efflorescence.