Rust-Oleum Mathys Primer 44 HS


Rust-Oleum Mathys Primer 44 HS has a large fixation capacity for stabilising loose particles and improving the adherence of subsequent topcoats.

  • Unsaponifiable
  • Good UV resistance
  • Excellent fixation on roofs
  • Very flexible  
  • Chlorinated rubber technology, solvent-based 
  • Quickly water-resistant (1 hour after application at 20°C)

£68.63(ex. VAT)
£82.36 (inc. VAT)
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In Stock and Available for Delivery (See Delivery Options Below)


Rust-Oleum Mathys Primer 44 HS

Large fixation capacity for stabilising loose particles – improves the adherence of subsequent topcoats – Unsaponifiable – good UV resistance – flexible, fixation layer for porous and unpainted mineral substrates

Technical Data

  • Density: 1,1
  • Gloss Level: Gloss
  • Solids content in volume: 32 %
  • Solids Content in weight: 45 %

Drying Times At 20°C/RH 50%

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

Theoretical Consumption

14 m²/l

Practical Consumption

10 - 15 m²/l. Practical coverage depends on many factors such as porosity and roughness of the substrate and material losses during application.

Further information can be found on the product data sheet.

Product Details

Data sheet

For Use By
Industrial Use
For Use By
Professional Use
Interior / Exterior Use
Water / Solvent Based
Single, Two or Three Pack
Brush, Roller, Spray
Dry to Handle (at 20°C)
1 Hour
Dry to Recoat (at 20°C)
24 Hours
Fully Cured (at 20°C)
24 Hours
14m² per litre
Min. Application Temperature
Solids by Volume
32 %
599 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
23 µm
Recommended Wet Film Thickness
70 μm
UN Number
10 - 15 m²/l
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 Kate on 2021-07-07 09:17:36

Is this product suitable for previously painted or unpainted asbestos?

Answer from Rawlins’ Technical Team: 

This primer is for improving the adhesion on bare porous substrates such as asbestos and not generally used on previously painted surfaces.

questions MBP on 2021-05-08 15:35:31

I have a fairly large corrugated roof on my shed, all rusty. Would the primer 44 HS be suitable for that?

Answer from Rawlins’ Technical Team: 

No, this primer is for use on porous and mineral substrates, assuming the metal roof is pitched, it is clean, dry, sound and prepared as detailed in the technical data sheet we can recommend Rust-Oleum Mathys Noxyde Pegarust.

questions Martin Hewett on 2020-12-01 13:27:38

I’m trying to fix a small leak in a slate roof,already had a roofer try and find it with out luck. I’ve already purchased Rust-oleum Mathys fillcoat fibres from you and I’m also going to purchase the primer 44 HS my question is after priming how soon can I apply the fillcoat fibres? The information on the web site says touch dry 1 hour reapply 24 hours primer. Not clear as when I can put the fillcoat on? Many thanks Martin

Answer from Rawlins’ Technical Team: 

Primer 44HS is dry to over paint in 24 hours when applied at 20°C and a humidity of 50%.

questions darren on 2017-03-23 15:22:35
Question: can i use mathys primer 44 on exterior lime rendering ?? thanks
Answer from Rawlins’ Technical Team: 

As long as the lime render is in good condition, clean, prepared, etc, then Rust-Oleum Mathys Primer 44 HS would be our normal priming solution prior to applying suitable topcoat(s).


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