Mathys Pegafix


Mathys Pegafix is a colourless impregnating primer for porous, mineral substrates such as concrete, breeze block, bricks, etc. before painting them with waterborne paints.

  • High fixing capacity
  • Superior penetration characteristics
  • Water based

£32.47(ex. VAT)
£38.97 (inc. VAT)
Please choose your colour
In Stock and Available for Delivery (See Delivery Options Below)


Mathys Pegafix

Mathys Pegafix is a colourless impregnating primer for porous, mineral substrates such as concrete, breeze block, bricks, etc. before painting them with waterborne paints.

Features & Benefits

  • High fixing capacity
  • Superior penetration characteristics
  • Water based

Technical Data

  • Density: 1,0
  • Gloss Level: Gloss
  • Gloss level at 60º: Glossy: > 80%
  • Solids content in volume: 14 - 16 %
  • Solids Content in weight: 14 - 16 %

Drying Times At 20°C/RH 50%

  • Touch dry: 1 hour
  • Dry to handle: 4 hours
  • Dry to recoat: 2-4 hours
  • Fully cured: 24 hours

Theoretical Consumption

  • Very porous substrates (concrete, bricks): 5 - 10 m²/l. 
  • Little porous substrates (plaster, porous paints for inside use): 15 - 20 m²/l

Practical Consumption

Practical coverage depends on many factors such as porosity and roughness of the substrate and material losses during application.

Surface Preparation

Remove dust and / or clean carefully. Blistering plaster has to be sanded slightly to ensure a good adhesion or an adhesion test has to be done in advance.

Directions For Use

To ensure homogeneity, coating materials should be thoroughly stirred prior to use

Application Conditions

> 5°C, < 90% R.H.

Application Methods

  • Brush: Apply undiluted.
  • Roller: Apply undiluted.
  • Airless Spray: Nozzle: 11 - 15 / Pressure: 200 bars.
  • Air-Atomised Spray: Apply undiluted.


On low porosity substrates, Pegafix is preferred above Parafix and Porisol because of its better penetration characteristics. Possible dried spots (on windows, floors, etc.) can be removed with Thinner 22. When using on chalking substrates, always test for fixing suitability.

Product Details

Data sheet

For Use By
General Use
For Use By
Industrial Use
For Use By
Professional Use
Interior / Exterior Use
Interior and Exterior
Interior / Exterior Use
Interior & Exterior
Water / Solvent Based
Water / Solvent Based
Application Method
Brush, Roller, Airless Spray, Spray
Single, Two or Three Pack
Single, Two or Three Pack
Single Pack
Pack Size
Dry to Handle (at 20°C)
4 Hours
Dry to Recoat (at 20°C)
2 - 4 Hours
Fully Cured (at 20°C)
24 Hours
8m² per litre
Min. Application Temperature
Solids by Volume
14 - 16 %
0 g/l
Shelf Life (from date of manufacture)
2 years from date of production in unopened cans, if stored in dry, well ventilated areas, not in direct sunlight at temperatures between 5° and 35°C
Touch Dry
1 Hour
Recommended Dry Film Thickness
15 µm
Recommended Wet Film Thickness
100 µm
UN Number
Not regulated
Product Type
Fastest Delivery
Next Working Day

Customer agrees that before placing an Order, Customer has read and understood the most up to date Product Data Sheet for the Product. Where we have access to the Product Data Sheet from the manufacturer, we will either provide a copy on request, or include a link to the Product Data Sheet available on the manufacturer’s website. Customer further agrees that we have no liability for any errors or omissions contained within the Product Data Sheets. For more information, please see our Terms & Conditions of Sale.

questions David Hutt on 2023-04-25 12:53:48

Hi. Two questions - 1) do you recommend 2 coats of Pegafix on a rendered exterior wall where the previous paint has largely flaked off? 2) What is the mxximum time I can leave the wall after applying Pegafix before applying Mathys Murfill? I ask this because I am dodging the showers, and there may be some days after I've primed the wall before I can apply the Mathys Murfill. Thanks, David.

Answer from Rawlins’ Technical Team: 

Before application we would recommend all loose and flaking material is removed back to a clean, dry, sound surface.

If this is back to bare cement render this should be primed with either Rust-Oleum Mathys Primer 44 HS or Mathys Pegafix.

Mathys Pegafix can also be used prior to application of Rust-Oleum Mathys Murfill Renovation Paint to chalking paints.

Mathys Pegafix is dry to recoat in 2 to 4 hours and fully cured in 24hours at 20°C this should be overpainted before it is fully cured.

Question about the product

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Mathys Pegafix is only available with the shipping and delivery timescales listed below - please do not contact our Customer Support Team with enquiries about alternative or earlier shipping and delivery times.

Saturdays and Sundays, as well as Bank Holidays, are not classed as working days.

Orders placed after the cut-off for this product will not be processed for earliest dispatch until 9am the next working day.

All delivery costs below are excluding VAT

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