Rust-Oleum Mathys Dac Hydro Alu


Rust-Oleum Mathys Dac Hydro Alu is a waterborne, ready-to-use aluminium coating for decoration, heat reflection and lasting protection of metal and most bituminous roofs. It has excellent resistance to extreme weather and temperature fluctuations. 400% elastic, water vapour permeable it builds an abrasion resistant, rubberlike coat without joints or seams for a wide range of roof surfaces.

Bulk Buy

£36.77 tax excl.

£44.12   tax incl.

Product Description

Rust-Oleum Mathys Dac Hydro Alu is a solar reflective roof paint based on water dispersed acrylic resins providing a decorative aluminium finish that offers durable protection for roofs with solar reflective characteristics.

Rust-Oleum Mathys Dac Hydro Alu is 400% elastic, water vapour permeable and prevents strong warming up of the surface locally by the light reflecting effect of the pigments in the coating film. It keeps its aluminium finish even in strongly varying atmospheric conditions (U.V. rays, water, strong temperature fluctuations, etc.) and is recoatable. Rust-Oleum Mathys Dac Hydro Alu is builds an abrasion resistant, rubberlike coat without joints or seams for a wide range of roof surfaces.

Features & Benefits

  • Solar reflective and durable roof protection
  • prevents strong warming up of the surface
  • Lasting 400% elastic layer without seams or joins
  • Decorative aluminium finish resists UV, temperature changes, water and pollution
  • Waterproofing guarantee when used as a topcoat on Rust-Oleum Mathys Dacfill Waterproofing

Surface Preparation
The substrate must be clean, free from peeling, dust and dirt. Bridge cracks and fissures with Rust-Oleum Mathys Dacfill Fleece. Fill up joints with Rust-Oleum Mathys Elastofill. Very porous substrates have to be primed first with Rust-Oleum Mathys Primer 44 HS. Rust-Oleum Mathys Dac Hydro Alu can be directly applied on metals (except new galvanised steel), roofing and most bituminous products (> 1 year). Rust-Oleum Mathys Dac Hydro Alu can be applied without any problem on most waterbased products like Rust-Oleum Mathys Dacfill Waterproofing and Rust-Oleum Mathys Noxyde.

Do not apply directly on Rust-Oleum Mathys Fillcoat or Rust-Oleum Mathys Fillcoat Fibres. In this case it is necessary to apply first a coat of Rust-Oleum Mathys Dacfill Waterproofing. Rust-Oleum Mathys Dac Hydro Alu cannot be applied on flexible PVC, EPDM, tar or bituminous materials < 1 year, polyisobutylene and smooth bitumen-polymers. In case of stagnating water, Rust-Oleum Mathys Dac Hydro Alu must always be applied in combination with the Rust-Oleum Mathys Dacfill Fleece with a consumption of 2 litres per m².

Directions for Use
To ensure homogeneity, coating materials should be thoroughly stirred prior to use.

Application & Thinning

  • Brush: All types, do not dilute
  • Roller: Mohair roll with long hairs, do not dilute
  • Air-atomised spray: Not recommended
  • Airless spray: In case of airless-application, the aluminium finish will not be uniform; an airless-roll application is ideal, although in case of an airless application, it is necessary to roll over the surface with a roller.
  • Cleanup: Water

Application Conditions
Apply in good drying conditions at minimum 5°C.

It is your responsibility to read the Product Data Sheets (available below) before you place an order and prior to application of the product. The content of this website is our best recommendation and is not advice. Coverage rates quoted are approximate, you agree that coverage depends on the condition of the substrate, surface absorption, texture and application method. We ALWAYS recommend a trial area is coated to ensure the product meets your requirements before use.

Technical Data

Typical Coverage (per coat)0.6 - 3.3m² per litre
Touch Dry4 Hours
ApplicationBrush, Roller, Spray
The figures stated above are approximate. Please ensure you refer to all datasheets for full application information.


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.


Be the first to ask a question about this product!

Question about the product

* Required fields

The question has been correctly sent

Free delivery

On orders over
£75.00 + VAT

Low trade prices

Our best trade prices on everything!

Technical Advice

Fast FREE Technical Advice for Products & Projects

Click & collect

Order and collect from
our Leeds based trade store.
silent-exothermic unable