Is Mapei Ultracolor Plus Anthracite suitable for use with underfloor heating in a kitchen?

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.

How long does Mapei Ultracolor Plus Anthracite take to set, and when can I walk on the tiles?

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.

Mapei Ultracolor Plus Anthracite - 5kg

Description

Mapei Ultracolor Plus is a high-performance, quick-setting grout that combines efficiency with durability. Suitable for joints up to 20mm wide, it's mould-resistant, water-repellent, and features anti-efflorescence properties for consistent, uniform colour. This fast-drying cementitious mortar in Anthracite is perfect for both interior and exterior wall and floor applications and is easy to apply and clean.

Key features

Suitable for floor and wall use throughout the home

Key facts

Weight: 5kg
Sold per: Bag
Suitability: Floor, Wall
Material: Grout

Coverage: approx. 15 sqm (dependant on size of joint)
Colour: Anthracite
Range: Mapei

Delivery and returns

Standard delivery £25.00 1 to 3 working days. Free over £299.
Next day delivery £45.00 Order by 12pm, Monday to Friday.
Choose your day £35.00 Pick a weekday at checkout, at least 3 working days ahead. Not offered when free samples are in your basket.

Delivering to Northern Ireland (BT postcodes)? Email [email protected] and we will arrange it. All prices Exc. VAT.

Delivery policy

Returns and refunds Damaged or wrong items: tell us within 48 hours.

FAQs

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.