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Ronseal Diamond Hard Floor Varnish

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Ronseal Diamond Hard floor varnish dries to a clear, non-yellowing finish, whilst enhancing and prolonging the natural beauty of your wooden flooring.

This polyurethane varnish is Ronseal's strongest formulation, offering good protection against knocks and damages whilst resisting household chemicals.

Ronseal Varnish is touch dry within 30 minutes, with a re-coat time of 2 hours. For a tinted translucent finish try Diamond Hard Coloured Floor Varnish or Ronseal Diamond Hard Floor Paint for an opaque coloured floor finish.

  • Prices
  • Overview


Ronseal Diamond Hard Floor Varnish is available in a satin and gloss finish which allows the natural colour and beauty of the wood to show through - Perfect for wooden flooring and more. If you wish to varnish your floor and add colour, use available in satin only.

Ronseal Floor Varnish is suitable for use over most hard and soft woods, as well as hardboard, chipboard and wood composite.

Ideal for use on most domestic wooden floors including bathrooms and kitchens and is perfect for areas of high foot traffic such as hallways.

Note: Not to be used over laminate floors. Not suitable for commercial environments such as pubs, restaurants, community halls etc. For commercial premises or areas of very high traffic, consider Manns Two Pack Varnish or Bona Traffic HD.

Our customers love Ronseal's Diamond Hard Floor Varnish. And they appreciate being able to find out how to use wood floor varnishes via our blog post which includes a link to Ronseal's excellent video about varnishing a wood floor.


Prep - Unvarnished Floors: We know preparing a floor for re-coating can be a pain, but it's worth it to get wooden floors looking their best.

Start by sanding the floor. This will give the wood an even finish and help the Ronseal Diamond Hard Varnish to stick. The easiest way to do this is with a floor sander. Dustless floor sanders are readily available which help to prevent weeks of cleaning and can help to provide a better overall varnish finish. Use 120 grit sandpaper and go along the length of the boards. Make sure to wear a good dust mask, especially if not using a dustless sander.

Vacuum sanded areas thoroughly and wipe down with white spirit. If you notice any holes or imperfections use a suitable wood filler to fill them in.

Prep - Varnished floors: This depends what state your floor is in. If the old varnish is just in need of a refresh, give it a light sand with 120 grit sandpaper. Let the dust settle. Then give it a vacuum and wipe it down with white spirit.

If the floor is in poor condition where the existing varnish is flaking off or there are areas that have worn though to the timber, sand the floor back to bare wood using a floor sander. Look at the Prep for Unvarnished Floors section above to see how to do this.

Application of Diamond Hard Floor Varnish

Always do a test area first.

Ensure that the room temperature is above 10℃. Remove all furniture and allow for good ventilation.

Stir the Ronseal Floor Varnish thoroughly before and during application to ensure a consistent finish. 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.

Apply 3 coats to give the best protection leaving 2 hours between each coat. 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). Wipe down with a damp cloth. Then put the 3rd coat down.

Equipment Cleaning

Scrape off as much varnish as you can from application equipment, then wash in warm, soapy water. Don't put any left over polyurethane varnish down the drain or into watercourses. Local authority waste disposal sites usually have facilities to dispose of unused varnish.

Drying Time

Ronseal Varnish is touch dry after 30 mins. Allow 2 hours between coats.

The freshly varnished floor will be ready for light foot traffic in 2 to 3 hours of the final coat. Wait 24 hours before moving furniture back in to the room taking care not to drag it across or scrape the floor. Full curing time for Ronseal Diamond Hard Varnish is 72 hours.

  • Reviews

Ronseal Diamond Hard Floor Varnish reviews - Rating: 4.8 out of 5 stars, based on 60 reviews.

Filter:   All reviews (60)   5 stars (54)   4 stars (4)   3 stars (1)   1 star (1)  

Bernice Tudor
It did what it said on the tin.
It was easy to apply & produced a lovely finish, my floors look like they have just been laid again ! Would definitely use again.
Brian Case
Does exactly what is says on the tin!!!
An excellent product I have used before, and will continue to use. I am a woodcrafter, and I use this varnish in circumstances where a wax polish can't be applied. It sets rock hard,is very quick drying (overcoats in 15 - 30 mins depending on temperature), and if you apply 3 coats, then fine sand (320 grit) to remove the nibs before a final coat, it looks fantastic.
Richard Nelson
Tough hard finish
Water based so quick drying and with enough of a shine to look good without being glaring or slippery.
Ok so far
very nice finish and dries quickly. good value
Caron Bentley
Simple to use
This is a low odour, simple to use product that worked very effectively on my sanded floorboards. It dried very quickly too so you can get the three coats on in one day if you get up early! :)
Carla Perry
As it says on the tin!
Excellent product... as for wearability, I won't know for a while as it's only just been used... Extremely rapid delivery, thank you.
Celine Kerridge
Excellent product at an excellent price! I didn't find it cheaper anywhere. We'll definitely use this product again when needed.
Maria Johnstone
Brilliant finish
This varnish was great, we done 3 rooms with it, it was easy to apply and looks fantastic now it's finished. We have small children too and so far it's standing the test of toys smashing against it. On the down side sanding the floors was a nightmare, anyone considering taking on this headache should look at local companies who will do it for you and probably book a holiday till they have finished. They look amazing but I won't be doing it again, ever.
George Simpson
Excellent product
Easy to work with and super finish
Annabelle Ladd
Wonderful, great product
Lovely product, great delivery times and super helpful staff. Cheaper then anywhere I looked.
Dianne Mitchell
Does what it sdays on the tin
Excellent product easy to apply (with the right brushes)and looks really good, happy it is protecting our wood floor.
Lorraine Harvey
Good protection
Really solid protection. Will cope with dining room chairs repeatedly being pulled over it but for seriously stupid scrapes you are unable to go back and remove a little to re-sand. Brought in industrial sander to match up various origional floorboards and it was a nightmare to remove! Does what it says on the tin but seriously respect the floor afterwards!! Or else! It also looks like too plastic a finish for my liking but have used it twice because I needed to make a quick decision.
Robert Morrison
Great Product
Easy to use,dries fast and protects well, everything you want from a varnish!
Kevin Jenvey
Very easy to use.
Excellent service and did exactly what it said on the tin. Great price.
David Fitzpatrick
It must be about the best
It does what it say's on the tin. It is pricy but very good. Ronseal tecnical are very good and easy to contact 10/10
Brian Mudie
A super hard finish just like a diamond.
I used this product for the first time about 5 years ago and it has really stood the test of time on my study floor. Just re-applied another 4 coats and expect it to last for another five years.
Dennis Hills
I would certainly use it again.
It is easy to apply, dries quickly, and cleans up with water. The results are a hard enduring finish that looks great.
Ian Hammond
Easy to get a brilliant finish
This was used to improve the worn varnish in a kitchen with a wood block floor. This was a large kitchen so It was done in two halves so it could continue to be used. The quick drying meant that the whole job could be done in 2 days with 3 coats applied after a sanding. The end product looks really good with an impressive shine.
H Gardner
Just what I needed to finish the job, many people commented how good the finished floor looks
Nick Robinson
Great service, speedy delivery, excellent product
Ordered Ronseal Diamond Hard Floor Varnish from wood finishes as it was 20% cheaper than anywhere else and it arrived next day! Have used it on all my original Victorian pine floors for a superb, hard wearing finish (went for 5 coats to be safe!)

per litre
30 mins
dry time

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* Coverage can vary depending upon on the type of wood used and the amount of product applied. Litreage amounts shown above are total, not 'per coat' amounts.
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