Fosroc Patchroc GP

Non Hazardous
A fast setting emergency patching mortar for concrete pavements and floors. Conforms to BS EN 1504-3 Class R4.
Available in 20x 25 Kg bags (1/2 Pallet) and 40x 25 Kg bags (Full pallet)
From £831.84 £693.20
In stock
Only %1 left
Product Description

Fosroc Patchroc GP is a fast setting emergency patching mortar for concrete pavements and floors conforming to the requirements of BS EN 1504-3 Class R4. Will generally accept traffic in 2 hours.

Best Uses

Fosroc Patchroc GP is formulated for the rapid and permanent reinstatement of localised patches in concrete pavements, airport aprons, access ramps and
floors. It is particularly useful when interruption of traffic must be minimised. Patchroc GP may be used internally and externally including areas subject to heavy trafficking.

For the reinstatement of large areas of concrete pavements and floors, the use of Fosroc Paveroc instead is recommended. Patchroc GP is suitable for repair methods 3.1, 3.2, 4.4, 7.1 and 7.2, as defined by BS EN 1504-3.

  • Rapid strength gain — will generally accept traffic in 2 hours
  • High strength, abrasion and weather resistance
  • One component, pre-bagged to overcome site-batched variations requires only the site addition of clean water
  • Excellent bond to the concrete substrate
  • Shrinkage compensated
  • Contains no chloride admixtures

Patchroc GP is designed for horizontal use. It may be applied up to a maximum thickness of 100mm. Thicker sections can be built up in layers or by use of Patchroc 250. Material should not be applied at less than 12mm thickness. Individual bay sizes should not exceed 4m2.


See product data sheet for full preparation and application guidelines.

Technical Details


  • London Underground Approved. LUL APR No. 2188
  • Patchroc GP complies with the classification R4 according to BS EN 1504-3, repair methods 3.1, 3.2, 4.4, 7.1 and 7.2
  • Patchroc GP complies with LU Standard 1-085 ‘Fire Safety Performance of Materials’.

Technical Info

Components: Single Pack
Type: Emergency Patching Mortar
Stock Colours: Grey
Tintable: No
Application Method: Trowel and Tamper
Theoretical Coverage: Approximately 12 Litres per 25 Kg bag (approximately 1.0 m2 at 12 mm thickness)
Water Addition Per Bag: For normal applications, place 2.4 to 2.8 litres of drinking quality water into the mixer.
Compressive Strength: 20 MPa at 2 hours, 50MPa at 24 hours and a drying shrinkage of <300 micro-strain at 7 days
Minimum Thickness: 12mm
Maximum Thickness: 100mm
Placing: Place the grout within 20 minutes of mixing to gain the full benefit of the expansion process.
Cleaner / Thinner: Patchroc GP should be removed from tools, equipment and mixers with clean water immediately after use. Cured material can only be removed mechanically.
Shelf Life: 12 months from the date of manufacture if kept in dry storage in the original, unopened bags. If stored at high temperatures and/or high humidity the shelf life may be reduced to less than 6 months.
Packaging: Available in 20x 25 Kg bags (1/2 Pallet) and 40x 25 Kg bags (Full pallet)

The manufacturers data sheets are available for download from this website. It is your responsibility to read and understand all aspects of the data sheets before you place an order and prior to application. Please pay special attention to the preparation, mixing and application temperatures of the product, cleaning of substrate and environmental factors such as temperature, rain etc. Quoted coverage rates are based on the manufacturers theoretical rates and may vary depending upon substrates absorption, texture and application. We always recommend a test is carried out to ensure suitability.

Customer further agrees that Promain have no liability for any errors or omissions contained within the Product Data Sheets and are not liable for failure due to misapplication or inadequate substrate cleaning and preparation. For more information please refer to our Terms & Conditions.

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