General Advice for Application & Maintenance of FS & Rust-Oleum Mathys Wall Coatings

It is essential to read the relevant data sheets and follow the instructions. We also recommend you read the following before proceeding with coating your walls. If you require assistance please don't hesitate to contact us.

Preparation Advice - General Notes

It is essential that all areas to be coated are thoroughly clean and do not have any flaking paint prior to coating. Smooth or shiny painted surfaces should be lightly abraded to provide a key. It is good practise to always lightly abrade any surface prior to coating as this gives a better key. Any newly rendered, plastered, brickwork or blockwork wall must be allowed to dry out fully before applying any of the wall coatings.

Check the individual product information and data sheets to select the right product and determine if a primer should be used, and if so which one. If you are unsure give us a call and we will endeavour to assist you.

Internal Walls

Rust-Oleum Biosan Aqua, Biosan Aqua Plus and FS Epoxy Wall Coating, are good solutions for areas where hygiene is particularly important. The Biosan coatings contain the antibacterial agent BACTRON and this is therefore also ideal for any food, pharmaceutical or hospital use. FS Epoxy Wall Coating is an economical two pack water based epoxy coating that is mould and bacteria resistant.

Rust-Oleum and Mathys also manufacture a number of very specialist wall coatings. See our product pages for more information, or call us for advice.

Coverage rates are given as a guide only. Unlike floor coatings, which are most often applied to a fairly dense concrete substrate, wall substrates are often quite porous. The more porous the substrate the more resin will be absorbed into the substrate, and the less coverage will be obtained. Previously un-sealed surfaces can be quite porous resulting in a patchy finish and therefore requiring a third coat in order to achieve a good finish, as well as using a lot more product. Even for good surfaces a minimum of 2 coats will be required. Often you can apply a 'cheap' general purpose paint to seal the walls prior to applying a specialist product. This will help to reduce overall project costs.

Fibreglass reinforced wall coating systems can be applied by experienced contractors if required. We do not recommend that novices undertake this type of work. One of our specialist contractors has a lot of experience in this field.

External Walls

For external walls Mathys Peganox or Noxyde is ideal for use on Plastisol and similar metal cladding systems.

Mathys Murfill Waterproof Coating is a long term solution for exterior masonry walls. It is flexible and and will seal small cracks.

Note: We do not supply general masonry paints as these are very readily available from DIY stores.

Application of Coatings

It is essential to read and follow the instructions for the relevant data sheet.

Additional notes to assist with a successful application:

When products are delivered store them indoors, ideally at a temperature of 15 to 25°C as this temperature range is the best for application purposes. It is essential that the area to be coated is completely dry, and any water or oil leaks are sorted prior to application of the coatings. Following preparation of the walls use masking tape at termination points to ensure a neat job. (Note: the tape should be removed immediately following the application of the coating.)

Two Pack Products

For two pack products organise the product and mixing station.

You will require the following:

  • Plastic sheeting or cardboard to mix on
  • A slow speed drill and mixing paddle
  • 12 inch (or 9 inch) roller frame and rollers
  • 15 inch (or 12 inch) tray (larger size than rollers or they won't fit!)
  • Paint brushes for edges (these are not reuseable)
  • Rubber gloves
  • Safety glasses for the person mixing


Use a slow speed drill and paddle to mix materials. A stick is not suitable! The product should be mixed until a homogeneous solution is obtained. It is sometimes a good idea to add around 5% water for the first coat to water based products only (under no circumstances must water be added to solvented or 100% solids products). Refer to specific data sheets.

NB: Inadequate mixing will mean that two pack products will not cure.

Once mixed the product should be applied to the walls as quickly as possible as there is a relatively short usable time or 'pot life' - this time will be less the higher the temperature of both the product and the work area. (Data sheets generally give an indication of the pot life at 20°C.) Application will generally be with a 9 or 12 inch roller, with paint brushes being used at edges and corners. Where there is a lot of edgework it is necessary to have sufficient applicators to ensure that the coating is applied before it cures.

Cleaning Up

Copious quantities of water are required for spills of all water based coatings and primers. Solvent or white spirit is required for cleaning up spills of solvent based coatings and primers.

Disposal of Containers and Unused Product

Please ensure that containers are empty, and that if there is any unused product that you need to dispose of, that this is mixed (where applicable) to render it inert prior to disposal.

Contractor Application

Should you require an experienced contractor to apply a coating system, including fibreglass reinforced systems we can arrange this. Alternatively we can offer advice to assist you in completing the project successfully yourselves.

The above notes are for guidance only and First Solution Supplies cannot guarantee a project's success due to situations beyond their control.

We also supply floor and metal coatings, and roofing products and services.

First Solution Online

10 Bailey Lane, Wilton, Salisbury, Wiltshire, SP2 0FS

Tel: 01380 831299 Email: [email protected] Web: