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Norcros Rock-Tite Brush in Grout 15kg - Steel Grey

Size 15 Kg
SKU: 451490
26 pieces In Stock
sale price £39.99
inc VAT


Norcros Rock-Tite Brush-In Grout is a cement-free brush in permeable jointing compound designed for filling joints from 3mm wide between concrete, natural stone
and porcelain paving slabs which have been laid onto a solid permeable base using Norcros Rock-Tite Mortar.

Key Features

  • All weather paving joint compound
  • Suitable for all types of paving slab including porcelain
  • Cement-free
  • Norcros Life Time System Guarantee *when used in conjunction with Rock-Tite Primer and Mortar
  • Air drying
  • Coverage examples: 600x600x25 - 8mm - 12m2 / 450x450x25 - 8mm - 8m2

Easy to use and offering the ultimate in convenience, Norcros Rock-Tite Brush-In Grout has been specifically developed to match Norcros 4 into 1 and Flexible Wide Joint Grout colours to complement interior tiles and allow the creation a continuous aesthetic from indoor areas to exteriors. When used on a free-draining permeable sub-base, Norcros Rock-Tite Brush-In Grout can be applied in most weather conditions down to a temperature of 3C. Do not apply in heavy or prolonged rain as this will extend the curing process and may result in an uneven surface texture once the grout has cured. Any left-over grout can be poured back into the tub and stored by covering with water to at least 50mm above its surface. Watch Rock-Tite Installation Video

Product Details
Product Guides
  • SKU 451490
  • Colour Grey
  • Weight 15.00 KG

Product Reviews

Tom Berger 02/04/22

Great consistent colour, very good match for light grey and off white tiles. Easy to work with and excellent finish

Verified Buyer

Guest 07/08/21



Verified Buyer

John A. 30/05/21

Great product needs little work

Great product needs little work just follow guidelines thanks

Verified Buyer

Mr M. 21/05/21

A good product, but slightly

A good product, but slightly expensive then other available similar products, in the market.

Verified Buyer

Andrew b. 03/05/21

Easy to use

Quality product quick easy and was down within a blink of a eye looks great with marble slabs

Verified Buyer

Siseci 21/09/22

Shall i mix water as the other grout ?


Our advice: The project needs to be thoroughly hosed down and kept wet during the application. The grout is not required however to be mixed with water. We would advise looking at our installation video which is found in the product description.

Debbie 13/07/22

Hi can this be used a porcelain patio on a sand and cement base?


Our advice: Yes, it can be. Please note we wouldn't however recommend the method of installation you plan to use for the Porcelain tiles.

jeanie 21/05/21

HI, What colour of grout would you recommend please and how much for 20sqm.


Our advice: Could you advise which tiles you intend to use as my advice would be completely dependant on this?

S.B 07/05/21

Can this be used on exterior porcelain tiles placed onto a concrete base please?


Our advice: Yes, this product can be used.

Greg W. 23/04/21

How much does a bag cover for 900mm x 600mm tiles with 3mm spacer


Our advice: This grout covers 12m2 if used with a 600x600mm slab with grout joints of around 8mm thick.

Khurram 12/08/20

How much coverage does one bag provide?


Our advice: Coverage is dependent on the tile size and thickness- examples are 600x600x25 - 8mm - 12m2 , 450x450x25 - 8mm - 8m2

Simonstig 18/02/23

How long can you keep unused grout covered with water in the tub


Our advice: The grout would be preserved for around 12 months dependant on the condition it is stored in.