Keracolor U Unsanded Grout

Premium Unsanded Grout with Polymer

Keracolor U Unsanded Grout is a premium-grade, preblended, polymer-modified unsanded Portland-cement tile grout that requires only the addition of water for mixing. It will grout joints from 1/16" to 1/8" (1.5 to 3 mm).

Bio Block
CG2 WA

Technical Data Sheet

Safety Data Sheet

Available Colors

5220 Eggshell (formerly White)
5005 Chamois
5093 Warm Gray
5009 Gray
5010 Black
5014 Biscuit
5015 Bone
5038 Avalanche
5077 Frost
5002 Pewter
5047 Charcoal
5027 Silver
5019 Pearl Gray

FAQs

FAQ
Should I use an unsanded grout like Keracolor U?

Unsanded grouts like MAPEI's Keracolor U grout are best suited for tight grout joints 1/8" or smaller. Keracolor U is also recommended for grouting surfaces that can be easily scratched such as mixed-material mosaics, polished stone, glossy wall tile and glass tile (especially delicate glass tile). Keracolor U should always be tested in an inconspicuous area before grouting.

FAQ
Can Keracolor U be used in joints 1/8" or larger?

When MAPEI's Keracolor U is used for joints wider than 1/8" (3 mm), it may result in hairline cracks and the grout may dry to a level lower than the height of the surface of the tile. It is best to use MAPEI's Keracolor® S, Ultracolor® Plus FA or MAPEI Flexcolor® CQ grout for joints more than 1/8" (3 mm) wide.

FAQ
Can I use Keracolor U with installations of natural stone?

MAPEI's Keracolor U is unsanded. So, it's a great choice for grouting most installations of natural stone. When grouting installations of polished stone tile, it is recommended to build a mockup (sample board) or, at the very least, test Keracolor U in an inconspicuous area before grouting.

FAQ
Can Keracolor U be used to grout unfilled travertine and limestone tile?

If the desired look is to fill the voids and pitted areas, MAPEI's Keracolor U grout is a great choice. Choose a color of Keracolor U grout that most closely resembles the color of the travertine tile.

FAQ
Can Keracolor U be used to grout pebble tile?

It is best to use MAPEI's Ultracolor® Plus FA grout when grouting pebble stone and river rock mosaics.

FAQ
Can I use Keracolor U with installations of glass tile?

MAPEI's Keracolor U is unsanded. So, it's a great choice for grouting most installations of glass tile. When grouting installations of delicate glass tile, it is recommended to build a mockup (sample board) or, at the very least, test Keracolor U in an inconspicuous area before grouting.

FAQ
Can I use Keracolor U with glossy wall tile?

MAPEI's Keracolor U is unsanded. So, it's a great choice for grouting most installations of glossy wall tile. When grouting installations of antique or handmade wall tile, it is recommended to build a mockup (sample board) or, at the very least, test Keracolor U in an inconspicuous area before grouting.

FAQ
Is Keracolor U recommended with wood-look tile?

It is best to use MAPEI's Ultracolor® Plus FA grout or MAPEI Flexcolor® CQ grout for grouting installations of wood-look plank tile.

FAQ
Can Keracolor U be used in a pool?

MAPEI's Keracolor U grout can be used in submerged applications such as pools, but a 21-day curing time is required before filling the pool. MAPEI’s Ultracolor® Plus FA grout is a better choice for pool installations.

FAQ
Can I use Keracolor U to regrout over old grout?

Cement-based grouts like MAPEI's Keracolor U grout won’t effectively bond to themselves. So if the existing grout is damaged, then at least 2/3 of the depth of the grout joint must be removed before regrouting. Note: If the existing grout is simply discolored, MAPEI’s UltraCare™ Grout Refresh can restore the look without removing the existing grout.

FAQ
Can Keracolor U be mixed with an additive?

MAPEI's Keracolor U grout can be mixed with MAPEI’s UltraCare™ Grout Maximizer. • 10 lbs. of Keracolor U grout requires 49 U.S. oz. of UltraCare Grout Maximizer.

FAQ
What is the proper way to mix a cement-based grout?

Be sure to follow the packaging instructions carefully when mixing. Keep the water-to-powder ratios correct and adhere to the mixing and resting times. Use a drill rather than mixing by hand. Do not add more water if the product begins to thicken. If you are using a grout additive such as MAPEI's UltraCare™ Grout Maximizer, keep the correct ratios of liquid additive to grout powder, do not add water, and adhere to the mixing and resting times. Use a drill rather than mixing by hand. Do not add more liquid additive or add water if the product begins to thicken.

FAQ
Do I have to mix the entire bag of Keracolor U grout at once?

If preferred, MAPEI's Keracolor U grout can be mixed in small amounts. First, dry-blend the grout, because color pigments can settle to the bottom of the bag during shipping. Then mix 1 U.S. cup of water to 3 U.S. cups of grout powder.

FAQ
Does Keracolor U need to be sealed?

MAPEI's Keracolor U is a cement-based grout and is porous. Therefore, it will absorb stains and should be sealed. Sealing Keracolor U grout will help to maintain it, keep it clean and minimize discoloration. Choose a high-quality grout sealer.

FAQ
How long until Keracolor U can be sealed?

Wait at least 5 days before applying a sealer over MAPEI's Keracolor U grout.