Flooring Background

H4 Wood & Stone

Colourless waterproof protection for softwood and hardwood

from 2 reviews
H4 Wood and Stone
  • Hydrophobic, water repellent protection against water, pollution, moss and dirt
  • Ideal for maintaining and protecting wood that has already greyed naturally
  • Allows the transporting of timber in difficult conditions (containers, film wrapped pallets…)
  • Appearance of the wood remains unchanged
  • Use as an additive to masonry paints to make surfaces water-proof

H4 Wood & Stone is a colourless, waterproof protection for wood which allows it to age naturally and turn grey without damage from water, pollution, moss and dirt. Perfect if you like the natural look of wood as it turns grey but are anxious to prevent damage such as splitting and cracking which will happen if wood is left untreated.

H4 Wood & Stone is hydrophobic and therefore water repellent, it is completely clear and will have no effect on the colour or appearance of the wood being treated. It is silicone-free and helps to prevent environmental attack including from mould and water.

H4 Wood & Stone is also suitable for use on stone and in masonry paints to significantly add to the water repellency of the wall surface. It is the perfect solution for external masonry / rendered of pebble-dashed walls.

Ideal uses for Owatrol’s H4 Wood & Stone

  • Maintaining and protecting wood that has greyed naturally
  • Allowing new wood to age naturally whilst still protecting it
  • Keeping a natural look to fencing
  • As an additive to masonry paints to make surfaces water-proof
  • Paint & waterproof walls in one operation.

Always read the Owatrol H4 Wood & Stone Product Information Sheet before using and follow the instructions carefully.

Surface Preparation

Surfaces must first be clean, dry and free of dirt, grease, grime, mildew and previous coatings. Treat any mildew with a 50/50 bleach/water solution. Scrub the solution on to the surface and allow it to stand for 10- 15 minutes before rinsing thoroughly.

After cleaning and/or stripping, allow the wood to dry for 2-3 good drying days or until it has reached a moisture content of 18% or less before applying the finish.

H4 Wood & Stone can only be applied to bare wood surfaces or weathered surfaces previously finished with H4 Wood & Stone. H4 Wood & Stone may also be applied to surfaces previously finished with Owatrol penetrating products including Textrol and Aquadecks without the need for stripping. Contact us for additional information and advice before proceeding. ALL other finishes MUST be completely and thoroughly removed. If necessary sand surface after cleaning and/or stripping (80 grit paper).

New wood surfaces

Test wood for absorbency by sprinkling water on the surface. If water is absorbed quickly, the grain is sufficiently ‘open’ and the surface is ready for finishing, proceed to Application. If the water is not absorbed then proceed as follows:

Alternatively mechanically or manually abrade surface with 80 grit paper and then clean and dust off to remove all loose wood particles.

Weathered wood surfaces (untreated)

To keep the grey look of the wood clean with a light detergent. To restore colour of wood clean with undiluted Net-Trol to remove all loose wood fibres, dirt and other surface contamination.

Previously coated surfaces

All previous coatings must be completely and thoroughly removed.

  • Oils and sealers: Strip with Aquanett or Prepdeck then neutralise with Net-Trol
  • Solvent (oil or alkyd-based finishes): Strip with Dilunett then neutralise with Net-Trol
  • Acrylic finishes (Water-based): Strip with Prepdeck then neutralise with Net-Trol
  • Other finishes i.e. 2 pack epoxies, urethanes… Strip with DSP 800 then clean the surface to remove residual paraffin

Note: Hardwoods and woods rich in tannins e.g. Oak, Chestnut, Douglas Fir, Cedar, etc. may darken with Aquanett, Prepdeck and Dilunett, neutralising with Net-Trol immediately after rinsing will lighten and restore the wood’s colour.

Application of H4 Wood & Stone to wood

Apply a generous, even application of H4 Wood & Stone and allow it to dry for 24 hours.

Quantity of H4 Wood & Stone as a paint additive

Add between 1 & 2 litres of H4 Wood & Stone to 10 litres of any water based masonry paint.


Clean the surface with Net-Trol and allow the surface adequate time to dry. Apply H4 Wood & Stone as directed above. To maintain optimum protection re-apply H4 Wood & Stone at the following intervals:

  • Vertical surfaces once every 12 months
  • Horizontal surfaces once every 6 months

Clean Up

Clean all tools and equipment with soap and water immediately after use.

Things to Remember

  • Cover everything you do not wish to coat, including plants and shrubs.
  • Do not apply in direct sunlight or to hot surfaces.
  • Surfaces in direct sunlight can reach temperatures of 60°C even when the air temperature is 30°C.
  • Do not apply if cold and/or wet weather is expected within 24 hours.
  • Do not thin.
  • Always work the entire length of a board or piece of wood to a logical break.
  • Never stop application in the middle of a board or piece of wood.
  • After spray application, always back-brush or back-roll to improve penetration and uniformity of coverage.
  • Ensure wood is dry – max 18% moisture content.

2 reviews for H4 Wood & Stone

  1. Avatar

    Nic Stenhouse

    I’m not surprised that the excellent Owatrol range has this product. Very helpful in ‘waterproofing’ a set of new outside oak steps to stop a tannin stain when it rains. Easy to apply and clear instructions given. So far no tannin stain after rain on the sandstone terrace surface since using H4Wood. Before obtaining and applying H4Wood, there were some significant tannin stains on the sandstone after rainfall. (Cleaned the sandstone easily with Owatrol Textrol!)
    I am very impressed with the large range of Owatrol products. Well thought out and very useful. Many thanks.

  2. Avatar

    Brian Lambert Verified Owner

    I use several Owatrol products and have found them to be very good. I needed to treat some external oak doors for a customer and the only product I could find after searching for hours on the internet. I needed something that was going to make them waterproof without affecting the colour. It has worked perfectly just as Owatrol said it would. Thank you Owatrol and keep up the good work. Brian

Add a review

Coverage Calculator Background Decking

Coverage Calculator

How much do I need?

Calculate Again
This coverage indication is only a guide and actual coverage is dependent on surface type, age, porosity etc.
Cogs Background
Coverage: 3-6m2 per litre
Tools: Brush, Roller, Airless Sprayer
Suitable for: Exterior use
Clean up: Soap & water
Drying Time: 1 hours (24 hours before use)
Suitable Surfaces: Softwoods & Hardwoods