Ronseal Diamond Hard Floor Varnish 2.5L

  4.9/5.0   196 reviews
You'll need enter area above for 3 coats (Recommended)

Wood type and application can vary coverage

  • A quick drying, water based varnish for hard wearing wood flooring
  • Offers a tough, durable finish, ideal for high traffic areas
  • Resistant to household chemicals
  • Enhances the natural colour and grain of the timber
  • Dries to a clear finish
  • Available in a range of sheen levels
  • Based on a polyurethane acrylate dispersion
Brand Ronseal
No. of coats 3
Coverage Up to 16 per litre
Drying time hrs
Size 2.5L
MPN 37539, 32583, 32582
GTIN 5010214875399, 5010214825837, 5010214825820

Ronseal Diamond Hard Floor Varnish is suitable for use over most soft and hardwood flooring, as well as hardboard, chipboard and wood composite.

Please Note: Not to be used over laminate floors. Not suitable for commercial environments such as pubs, restaurants, community halls etc.

For Unvarnished Floors:

  1. Existing coatings such as oils, waxes, stains must be removed by sanding the surface back to clean, bare wood. Do not use an abrasive paper finer than 120 grade for the final sand
  2. Vacuum sanded floorboards thoroughly to remove all traces of sanding dust
  3. Fill any holes or surface imperfections with a suitable wood filler

For Varnished Floors:

  1. Lightly sand existing floor varnishes with 120 grade sandpaper to provide a key
  2. Vacuum area to remove all traces of sanding dust
  3. Varnish in poor condition such as cracking, peeling and flaking should be completely removed back to bare wood

Always do a test area before starting any project to test product performance and results. Follow the manufacturer's instructions on the tin at all times. Ensure that the room temperature is above 10℃. Remove all furniture and allow for good ventilation.

  1. Diamond Hard Varnish should be stirred thoroughly before and during application to ensure a consistent finish
  2. Using a good quality brush, start in the corner furthest from the door and work along the length of 2 floor boards at a time
  3. Apply 3 coats of Diamond Hard to give the best protection, leaving 2 hours between each coat
  4. Before the 3rd coat, give the floor a very light sand by hand along the length of the floorboards with 240 grit sandpaper (don't use a floor sander)
  5. Wipe down with a slightly damp cloth to remove the sanding dust
  6. Then apply 3rd coat

Ronseal Hard Floor Varnish is touch dry within 30 minutes, with a re-coat time of 2 hours.

Regular Cleaning

For everyday cleaning, floors treated with Diamond Hard Varnish can be vacuumed and dry swept with a broom to remove any surface dirt or grit which might cause scratches to the finish. If the floor surface is stained or marked, a damp (not wet) microfibre cloth or mop may be used.

Deep Cleaning

For more stubborn marks, an appropriate floor cleaning solution may be applied. Always follow the manufacturer's instructions on the container.


Worn or patchy areas can be repaired by following the instructions on the tin.

196 customer reviews

Quality product, good price.

Reviewed Satin on: 09/09/17
Good stuff! by Lukas Senepart

Easy to use, flawless results. Will to wait a number of years how it can deal with wear and tear of course.

Reviewed Matt on: 04/09/17
Very happy with purchase by Joana L

The best varnish I ever used! Don't smell, quickly drying, easy to work with. Highly recommended!

Reviewed Gloss on: 01/09/17
Quality varnish by Martin Connell

Quality varnish goes on well good coverage ,superb finish after three coats giving a light rubdown in between coats,top specification varnish for floors well happy with finish product

Reviewed Satin on: 21/08/17
Does what it says on the tin by Lawrence Hayes

Went on well, good coverage, looks great and so far appears to be hard wearing

Reviewed Gloss on: 14/08/17
Finishes the floor by V Cleall-Harding

Hope it seals and helps the floor look fab for longer

Reviewed Satin on: 11/08/17
Really brilliant Floors and bannister have come up beautifully by Zoe John

Really does do exactly what it says on the tin! Really happy with this product. Goes on well, drys in no time (we had warm weather) and finishes beautifully.

Reviewed Matt on: 08/08/17
Super floor varnish by Antony Elmer

I used this varnish on a new oak floor I laid last year. It has lasted very well. It looks good and is easy to clean.So it was an easy choice this year when I installed an oak floor in another room. The varnish is easy to apply and very quick to dry which allows you to apply several coats in a day. The only advice I offer in addition to the instructions on the tin is to apply 4 coats to get an excellent finish.

Reviewed Gloss on: 08/08/17
User friendly, Good value and durable by Oliver Hill

This is the second time I am using this product. It has proved very durable and it is very easy to use. Low odour, easy application and quick drying - everything I want.

Reviewed Satin on: 26/07/17

Product was competitively price together with a fast efficient delivery.

Reviewed Satin on: 11/07/17
The cheapest deal by miles by Dr Nick Lamb

Excellent product I have used many times before.

Reviewed Satin on: 10/07/17

An excellent hard wearing floor varnish. Used it for several years now on iur pitchpine parquet floors.

Reviewed Satin on: 06/07/17

Very good quality

Reviewed Gloss on: 26/06/17

Very good

Reviewed Gloss on: 26/06/17
Brilliant! by Morten Hussmann

Very easy to apply. Brilliant finish as long as you do three coats with sanding after second coat.

Reviewed Matt on: 26/06/17
ALways great ! by Gabriela Anisko

Fantastic product

Reviewed Satin on: 16/06/17
Excellent product , gave the finish I wanted by Mrs L Cowell

Looks good on the floor , easy to apply and quick drying . Just what I wanted . Service from the company was top class , the first tin I had delivered had leaked, when I rang customer service they were very helpful and sent another tin on next day delivery . Very Happy customer 😊

Reviewed Gloss on: 14/06/17
Have used before, hard wearing and easy to apply by Paul Mitchell

Excellent product, had it on my oak floors for six years, now time to refresh

Reviewed Satin on: 09/06/17
Beautiful craftsmanship by Linda Jones

Bought this as a unique wedding gift and it was very well accepted. Really pleased. Quality item. Cx

Reviewed Gloss on: 28/05/17
Excellent by Mr P Jackson

Would certainly recommend and use again. Used satin on a softwood floor in my log cabin, I was able to give it 3 coats as it was so quick drying.

Reviewed Satin on: 18/05/17