FAQ | Mapei

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What size grout joints can Keracolor U Unsanded Grout be used with?

1/16" to 1/8"

What size of grout joints can be used with Ultracolor Plus FA?

1/16" to 3/4"

When using Mapeheat products underneath laminate, LVT or engineered wood, are there any other installation or use requirements?

Use the thermostat's setting for luxury vinyl / engineered wood / laminate to ensure that the in-floor temperature never exceeds 82°F (28°C).

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Which is better, a water-based or solvent-based sealer?

It used to be said that solvent-based products were more durable and longer lasting than water-based products. In today’s world, we have water-based technology that is equal to, or better than, solvent-based products. Because of their unique molecular construction, MAPEI’s UltraCare Penetrating Plus Stone, Tile & Grout Sealer and UltraCare Penetrating Plus SB Stone & Porcelain Tile Sealer are formulated for use on both porous and dense surfaces. To learn more, watch the video below.

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Why did my grout dry lighter than the color I purchased?

There can be different explanations of why this happened. The grout may have been washed too soon or too much during the cleaning process, causing pigment to be removed from the grout. Or, the grout powder may not have been dry-blended before mixing in order to avoid color variation.

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Why does Ultracolor Plus FA sometimes bleed and come out when I rub my finger on it?

This indicates that too much water may have been used either in the mix or the cleaning process.

Why would I choose 240 V instead of 120 V?

240 V gives you twice the square footage of 120 V at the same amperage, therefore allowing larger areas to be heated per thermostat. Please note that the dedicated-circuit voltage must match the voltage of the cable that is installed.

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