Ultracolor Plus with DropEffect technology is an ultra premium, fast-setting, polymer-modified, color consistent, nonshrinking, efflorescence-free grout for joint widths from 1/8 in. to 1 in. (3 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.