• Blackfriar Heavy Duty Varnish

    Blackfriar Professional Heavy Duty Varnish


    We no longer stock this product, but can recommend Rust-Oleum 4900 Polycoat 2K as a great alternative.

    Please note: it is important to check that any alternative product is suitable for your requirements, as our suggestion is given in good faith but without warranty. If you are in any doubt please first contact our technical team on 0113 2455450 (option 2) or send a message to [email protected] where we will be happy to discuss your project.

    Blackfriar Professional Heavy Duty Varnish is a two pack varnish that protects and transforms floors and work surfaces with a tough, hardwearing and professional finish. Resists dilute acids and alkalis, grease and chemicals, making it ideal for use in high traffic areas. Available in gloss and satin finishes.

    Product Features

    • Durable polyurethane finish.
    • Low odour.
    • Non-yellowing.
    • Clear, water-based formula.
    • Indoor use.
    • Suitable for wooden floors, furniture and concrete surfaces.
    • Brush or roller application.

    Product not available
    Temporarily Out of Stock


    Blackfriar Professional Heavy Duty Varnish is a two-pack varnish that protects and transforms floors and work surfaces with a tough, hard wearing and professional finish. Resists dilute acids and alkalis, grease and chemicals, making it ideal for use in sports halls, gymnasiums and on bar tops.


    Ensure surface to be varnished is clean, dry, sound and free from wax, polish, oil or any other contamination. If wax has been used clean the surface thoroughly with white spirit prior to sanding. Bare wood should be sanded to a smooth surface, always working with the grain. Sound, previously varnished surfaces should be lightly sanded to provide a key.

    Existing varnished surfaces which are unsound or in poor condition can be stripped back to bare timber with Blackfriar Professional Paint and Varnish Remover. New concrete must be at least 6 months old prior to varnishing. Concrete must be clean, dry and free from any surface laitance (a weak dusty layer on new concrete) and any other surface contaminants such as oils, grease, dirt etc. prior to applying the varnish. Power floated concrete must be prepared by suitable means (mechanical or chemical) to ensure an open, porous, sandpaper texture is achieved prior to varnishing.


    Base and activator supplied in correct proportions. Add all activator to base container and mix thoroughly for at least 5 minutes until product is smooth and even. Allow to rest 5 minutes before using. DO NOT MIX PART UNITS. Badly activated or incorrectly mixed materials will affect performance and may cause early failure or discolouration. The mixed material has a usable pot life of 4 hours (20°C).


    The product may be applied by brush or roller. If applying by brush, apply evenly using light strokes following the grain of the wood. If rollering, use a short nap mohair roller. For best results 3 coats are recommended on new wood and 2 coats on previously varnished surfaces. Prior to application of the final coat or if the over coating time is exceeded, lightly abrade with fine glass paper working with the grain and remove dust. The varnish will appear cloudy when wet but will quickly dry to a clear finish. When applying to new or bare wood, thin the first coat with up to 10% water.


    Not suitable for use on floor tiles or plastic type materials, e.g. imitation wood. Do not apply directly to power floated concrete. New concrete should be allowed to dry for at least 6 months before varnishing. Do not use under cold (less than 10°C), damp or humid conditions. Do not wash the varnished surface for at least 3 days after application. If water is spilled on it during this period gently wipe off with a soft dry cloth.

    Drying Time

    Touch dry - 2 hours (20°C). Hard dry - 8 hours (20°C). Full cure - 3 days (20°C). Recoatable after 4 hours.

    Clean Up

    Remove as much product as possible from application equipment before washing with water. Do not empty into drains or water courses. Some local authorities have special facilities for the disposal of waste coatings.


    • Clear, durable, water-based polyurethane finish.
    • Low odour, non-yellowing.
    • Chemical and stain resistant
    • Suitable for indoor use on wooden floors, furniture and concrete surfaces.
    Product Details

    Data sheet

    Blackfriar Professional
    Interior / Exterior Use
    Water / Solvent Based
    For Use On
    Prepared, Unprepared
    Application Method
    Brush, Roller
    Satin, Gloss
    VOC Levels
    Ultra-Low (5-49 g/l)
    Single, Two or Three Pack
    Pack Size
    2.5L, 5L
    Base Type
    Solvent Based
    12m² per litre
    Recommended Thinner/Cleaner
    Touch Dry
    2 Hours
    UN Number (Activator)
    UN Number (Base)

    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 Emily Harris  on 2017-01-02 11:29:27
    Question: Can you use this product on a painted surface to provide a hardwearing suface I.e a bar area were glasses etc are in and out to prevent scuffs and scratches on the unit hope to hear back from yourselves thanks Emily
    Answer from Rawlins’ Technical Team: 

    Blackfriar Heavy Duty varnish should is fine to go over most previously painted surfaces. With it being a 2 pack it will be harder wearing than single pack paint products. We would advise giving the surface a good rub down with a fine grade of sandpaper to key up the surface then wiping with Methylated Spirits to remove all dust.

    Apply 2 coats of the varnish following the application instructions carefully. Allow the varnish to cure fully for 7 days before subjecting the coating to any abrasion from glasses etc.

    Question about the product

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    Blackfriar Professional Heavy Duty Varnish 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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