Mapei Ultracolor Plus Anthracite – 5kg

Coverage depends on your tile size and joint width. As a guide, 1 kg of Mapei Ultracolor Plus Anthracite covers approximately 1.33 m² when grouting 100 mm x 100 mm x 8 mm tiles with 3 mm wide joints, so a 5 kg bag covers roughly 6.65 m² at those dimensions. For larger tiles or narrower joints your coverage will increase, so it is worth calculating your area carefully before ordering to make sure you have enough.

Yes, Mapei Ultracolor Plus Anthracite is fully compatible with underfloor heating systems and is listed as suitable for both floor and wall applications in kitchens and bathrooms. The grout is formulated for use with porcelain tiles, which are a popular choice over underfloor heating due to their heat conductivity. Just ensure the adhesive bed beneath your tiles is also rated for underfloor heating before you begin.

Once mixed, you have a pot life of 20-25 minutes, and you should wait 15-30 minutes after application before finishing the joints. The grout sets to light foot traffic in approximately 3 hours, making it a practical choice when you need a tiled floor back in use relatively quickly. Always allow the full cure before exposing the surface to heavy use or prolonged moisture.