Ronseal Diamond Hard Floor Varnish

  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
  • Sweet odour
  • Medium V.O.C content
Brand Ronseal
No. of coats 3
Coverage Up to 16 per litre
Drying time hrs
Size 2.5L, 5L
MPN 37539, 32583, 32582, 37540, 33608, 33607
GTIN 5010214875399, 5010214825837, 5010214825820, 5010214875405, 5010214836086, 5010214836079

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
Easily applied and gives a smooth finish by Alex Paterson

Firdt time I have used this product and am very happy with it.

Reviewed 2.5L, Gloss on: 20/02/18
Good quality product by Martyn Ferguson

Coverage was as per guide. Finish was excellent

Reviewed 5L, Matt on: 13/02/18
Excellent product by Mick Blamires

Easy to apply, dries quickly and gives a really smart and hard wearing finish. Just what we needed.

Reviewed 5L, Satin on: 11/02/18
Does what it says on the tin by Bob Gowers

As long as you do the prep and take your time this works well, don’t rush drying time and make sure the surfaces are clean and you can’t go wrong. Sq Mtr Coverage is about spot on and easy clean up so yes I would use it again, hopefully not soon !

Reviewed 5L, Satin on: 08/02/18
Does exactly what it says on the tin, brilliant product by Cathy McQuaid

Does exactly what it says on the tin, brilliant product.

Reviewed 5L, Gloss on: 02/02/18
Very easy to apply, quick build finish, wash brushes under the tap by Stephen Allen

I bought this for solid Oak flooring, the milky hue diminishes as it dries out, it's rapid drying allowed three coats in one day, once dry the the finish is hard ready for traffic, an excellent product.

Reviewed 2.5L, Satin on: 01/02/18
Does exactly plus more off what it says on the tin by Elaine Burling

Super shiney, high quality, tough heavy duty varnish, high recommended, my 24 year old parquet flooring looks like new.

Reviewed 2.5L, Gloss on: 27/01/18
Excellent product by Geoff Barton

Diamond Hard Floor Varnish is easy to apply and provides an incredibly durable finish. I've had it on my hall floor for the last 5 years and there is no obvious sign of wear.

Reviewed 2.5L, Gloss on: 25/01/18
Even and easy to apply, lovely finish by Katie Gentry

goes on very easily and evenly, really nice finish (I went with satin and it gives a lovely gentle shine, made the very tatty wooden floor look much better).

Reviewed 5L, Satin on: 12/01/18
Its a floor varnish I used before very good coverage by Bibu Chak

Great product, easy to apply with a brush dries very quickly

Reviewed 5L, Gloss on: 04/01/18
Good quality product, delivered to my door on time by Steve Buzzard

Good quality product, delivered to my door on time.

Reviewed 2.5L, Matt on: 21/12/17
Easy to apply Have used before and is very hard wearing by Kaye Morley

Easy to apply. Have used before and is very hard wearing.

Reviewed 2.5L, Satin on: 14/12/17
Great varnish, good price by Adriana

This varnish is very hard and just need 2 hours to dry if you want a second hand. We put three coats and the floor looks amazing

Reviewed 2.5L, Satin on: 13/12/17

Fast delivery, very well packed. Went on the floor a dream and has dried to a fab finish. When the Scout Hut floor needs another coat I know where I will be buying from.

Reviewed 2.5L, Gloss on: 22/11/17
Again, a good fast delivery and very well packaged by Liz Yelling

Does what it says on the tin. Fab.

Reviewed 2.5L, Satin on: 08/11/17
Kitchen and hall floor by Ian M

Easy to apply/use, satin looks natural. First coat soaks in, second looks OK, third coat make all the difference. Not too sure on wear resistance being water based, time will tell.

Reviewed 2.5L, Satin on: 01/11/17
Very easy to use and put down as a amateur by Ben Shorer

Really good product - using a roller I got bubbles when putting it down which scared me! But they disappeared and the varnish self leveled leaving a great finish!

Reviewed 2.5L, Matt on: 23/10/17
Does what it says in the tin by Geraldo Vecchiato

The quality of the finish is very good. It doesn't leave smell in the house and it dries very fast.

Reviewed 2.5L, Satin on: 09/10/17
Does what it says on the tin by Christienne Gibson

Very easy to apply although my wood floor took 5 coats. Resulted in a lovely glossy varnished floor in my log cabin

Reviewed 2.5L, Gloss on: 26/09/17
Excellent better than I expected by Andrew Stracey

This enhanced the wood far more than I expected and also covered more than expected too.

Reviewed 2.5L, Satin on: 21/09/17