Ronseal Diamond Hard Interior Varnish

Ronseal Diamond Hard Interior Varnish

How much will I need?
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Enter area above for 3 coats (Recommended Protection)

Wood type and application can vary coverage

£6.61 - £34.96
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A clear, water-based varnish for use on wooden doors, furniture, skirting and other interior wood.

Features

  • A highly durable, quick drying, water-based, interior varnish
  • Suitable for sealing in wood stains
  • Perfect for wooden doors, furniture and other interior wood
  • Resistant to knocks, scuffs and scratches
  • Enriches the natural character of the wood
  • Available in a range of sheen levels
  • Low V.O.C
Brand
Drying time
hr
Coverage
Up to 16 m2 per litre
No. of coats
3
Size
250ml 750ml 2.5L
MPN
Please Select Size/Option
GTIN
Please Select Size/Option

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Overview

Overview

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Ronseal Diamond Hard Interior Varnish provides a hard wearing finish for all interior wooden surfaces, including bare or previously varnished wooden doors, furniture, dining tables and skirting boards.

Please Note: This product is not suitable for previously painted wood.

Alternative Ronseal Products

Product Use
Ronseal Diamond Hard Coloured Interior Varnish - Matt A Matt finish, coloured varnish for interior wood
Ronseal Diamond Hard Coloured Interior Varnish - Satin A Satin finish, coloured varnish for interior wood
Ronseal Diamond Hard Coloured Interior Varnish - Gloss A Gloss finish, coloured varnish for interior wood
Ronseal Diamond Hard Floor Varnish A clear varnish for floors, available in a Matt, Satin or Gloss finish
Ronseal Diamond Hard Coloured Floor Varnish A coloured varnish for interior flooring
Ronseal Diamond Hard Floor Paint An opaque, coloured floor finish

Preparation

Preparation

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Ensure all surfaces are free from any dust, dirt, wax, grease, oil or other surface contaminants that could affect the adhesion of the varnish.

Bare or New Timber

  1. Make good any holes or defects in the timber with Ronseal High Performance Wood Filler, Ronseal Multi Purpose Wood Filler or other suitable wood filler
  2. Lightly sand the wood, then remove any sanding dust and wipe with a lint-free cloth dampened with methylated spirits and allow to dry
  3. Remove any mould with a dedicated mould and mildew cleaner
  4. Open doors and windows to allow for good ventilation while varnishing

Previously Varnished Timber

Remove any loose, flaking or peeling coatings with a scraper or a dedicated varnish remover, then treat as New Timber.

Application

Application

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Always do a test area before starting any project to assess product suitability and final finish. Follow the manufacturer's instructions on the tin at all times. Stir thoroughly before and during use to insure a consistent finish.

  1. Apply the varnish evenly, using a good quality synthetic brush, in the direction of the wood grain
  2. Apply 2-3 coats, leaving 1 hour between coats
  3. Before applying the final coat, give the wood a quick sanding and wipe down with a lint-free cloth dampened with methylated spirit to help the varnish stick and give a smooth finish

Please Note: If you get any water on the varnish within the first couple of days, wipe it off gently with a clean, dry lint-free cloth. Do not rub it.

Cleaning Equipment

After use, brushes can be cleaned with warm, soapy water.

Aftercare

Aftercare

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Regular Cleaning

Varnished surfaces can be cleaned by wiping with a dry (or slightly dampened) lint-free cloth.

Deep Cleaning

For stubborn marks, a dedicated wood cleaner can be used. Always follow the manufacturer's instructions on the container.

Maintenance

If the finish begins to look worn over time, simply apply a fresh coat of Ronseal Diamond Hard Interior Varnish, following the Application instructions above.

Repair

To spot repair any scuffs or marks to the finish, simply clean the affected area and apply a fresh layer of varnish to the damaged area(s).

F.A.Q.

F.A.Q.

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Will the Diamond Interior Varnish stop my wardrobe from getting damp?

The varnish creates a film over the surface of the timber which gives it a layer protecting it against scuffs, abrasions and moisture. It is not designed to be in damp environments for a prolonged amount of time and if any moisture is left on the surface coating for an extended period this will deteriorate the film and can cause many problems. It is also worth noting that the timber must be completely dry and have a moisture content below 20% before any product can be applied to it.


Can Diamond Varnish be used on oil-based gel stain?

Without knowing the specifics of the stain is it difficult to say. We would advise a test area to assess the result.


How much will I be able to cover from a 750ml tin?

As this covers to 16m² per litre, per coat, we would expect a 750ml tin to cover approx 4.8m² with 3 coats.


Can I use Ronseal Diamond Interior Varnish on kitchen worktops?

We would recommend something which has been tried and tested with spillages and heat, giving a food safe finish. Why not call our Woodcare Experts on 01303 213838 to discuss your options.

Reviews

Reviews

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56 customer reviews
4.2/5.0
based on last 18+ months
5 stars
46
4 stars
9
3 stars
1
2 stars
0
1 star
0
5/5
Product was excellent for my Oak veneered doors
Product was excellent for my Oak veneered doors so happy with the finish
Peter Kilgallen. Satin, 2.5L (01/09/25)
5/5
Great product, does what it promises
Great product, needs good stirring before use
Aija Bogdane. Matt, 2.5L (17/08/25)
5/5
Easy to use & gives a good finish
Ronseal is a long standing & reliable brand. This varnish is easy to apply & because it is water based dries very quickly, allowing further coats to be applied in record time.
Cornishman. Satin, 250ml (03/04/25)
4/5
Good product - needs better instructions
Tried putting the second coat on plywood lining in a shed when it was cold (maybe 5 degree C). It didn't go on well and took ages to dry. Nothing on the tin or your website suggests that applying in cold weather would be a problem, but when i found a data sheet on what i assume is a similar product (Ronseal Trade water-based interior varnish) it made it clear that water-based varnish should not be applied in conditions less than 10degree C. After sanding down and applying a third coat on warmer day it looks good though.
Stephen Ludlow. Matt, 2.5L (15/01/25)
3/5
Slightly tacky finish
Easy to work with but once dry has a slightly odd tacky finish, which is a shame as it was used for a bannister.
Seema Mehta. Satin, 250ml (20/10/24)
5/5
Great product , hard as nails , no complaints
This really does the job. Pleased as punch, use it a lot and will continue to use.
Jon Burbage. Satin, 750ml (09/01/24)
5/5
Finishes well with a flock roller but knock the first coat back
Great for a fast turnaround and appears to wear well. Not great anywhere near water splash though.
Jonathan. Matt, 2.5L (27/06/23)
5/5
Good varnish, easy to use and clean wash-up
Used over painted furniture to give a good finish. Easy to use and wash up with soap and water.
Jane Smith. Matt, 750ml (04/12/21)
4/5
Very user friendly product!
I use this a lot - on bare wood and over the top of any water-based paint. Always great and easy to clean up after. Bear in mind it's not suitable for floors and table/desktops.
Andy. Satin, 750ml (11/07/21)
5/5
Top product
Have used this stuff before. It goes on a 'soapy white' but this is the carrier and will disappear. It does though allow you to control your brush strokes as you can se what you are doing. Quite a fast drying time and a good finish. With very porous materials three or four coats will be required but with the fast drying time the job will actually be done faster that old fashioned varnish.
R Johns. Satin, 750ml (20/03/21)
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