Osmo WR Base Coat (4001)

Needs to be applied sparingly - multiple coats if required better than one thick one.

Purchased the Osmo Base Coat to treat the oak frame on a wooden cart barn that is used as a garage. I washed the oak first and that removed a lot of the grime. Put on one coat using a brush. The oil soaked in well and the oak looks great now. It is protecting he oak as water is not now soaking into the oak. I will apply a second coat when it stops raining. I used about 1.5 litres on the first coat. I have also an oak porch to treat as well and will be using Osmo again. Would recommend.

The foundation for ensuring our new accoya windows last 50 years.

Good communication and service, will buy again

Bought this to treat an external oak frame from any rot or insect attack, whilst allowing the natural silvering process to continue. We did not want to change the natural appearance or colour of the oak with other products that coat/darken and then require regular annual application. This base coat quickly soaked into the oak and dried to leave almost no visual change to the frame, but giving some peace of mind that there is now an enhanced element of weather and bio protection for the frame in the short/medium term.

Great service and fantastic customer service about these products definitely use these products and more and this company

I hope this product with the light oak 425 will last more than 3 years

I used this the base coat my shed trim after having a few roof fitted. Then IK applied Osmo Country Colour an amazing finish

Hard to evaluate a product designed for longevity in the short term. Only time will tell if it's good value.

Yes it’s clear, just slightly yellows timber on application. Whether it does all it says like reduce movement, protect timber from degradation etc, only time will tell. Brushed on extremely easily and dried much quicker than advertised but was applied to new and sanded timber which absorbed it well.

I spent several days sanding down a beautiful wooden garden bench as previous owner applied paint/varnish. I applied the Osmo WR base coat 1st for added protection, just the one coat and let it dry for 24hrs. I then applied the Osmo Natural Oil Woodstain (Oak) making sure I had a few good dry days (weather wise) and very happy with the finish outcome. The wood stain really enhanced the natural wood and you can tell by the look that the Osmo Woodstain Oil is an excellent product. I found that applying with a cloth rather than paint brush was far easier, less messy and you use less oil.

One 2.5 litre tin was enough for one coat ( which is all that’s recommended) on a 5x3 metre log cabin. having only just completed the job I cannot comment on it effectiveness.

Does what it says well worth it

I have used the product and i have bought the product again and i was so pleased with it

An alternative to paint that keeps the appearance of wood, goes underneath the Osmo top coat.

An excellent and easy to apply base coat which gives the wood a really nice deep hue. I used this product on larch before using another Osmo product (UV Protection Oil Extra). Would definitely recommend.

Used with Oslo woodstain a great application Also prompt delivery and competitive price

Product very good, price very good, too! Excellent packaging. Definitely recommend.

Applied to summerhouse. Easy and made sound base for colour top coats.

If you are buying Osmo you know what you get. Used on DIY projects for years and not found better. This product is really easily absorbed for deep penetration.

We've used this product for a few years now always find it gives good protection. We've recently had a new oak building constructed and was advised to use it to seal the outside for weather protection it seems to have worked.

I used this under the Osmo UV Protection Oil and used a couple of coats to try and eliminate fungal spotting or greying under the oil finish. So far so good after 14 months. It's super easy to apply and dries quickly.

I bought Osmo Natural Oil Woodstain Clear Matt 701 and Osmo WR Base Coat 4001 for 2 external garden benches based on recommendation. I sanded back to bare wood and after initial treatment of prescribed coats the result looked good. After 6 months of winter, both benches looked terrible with horizontal surfaces peeling. My friend had the same experience with same products on multiple benches. In the small text, Osmo do warn against using the products for horizontal surfaces likely to encounter standing water. £120 wasted !!

Does exactly what it says on tin and easy to apply

Gives a good base for the uv oil. Very good

Covered a 9x8 foot wood fence twice and used 3/4 of a tin. Soaks in on the first coat and the second is easier to put on. I jut I'd bought enough for a third coat. So easy to apply and for the protection is provides, it is a no-brainer.

I used this on a planter which I did not wish to turn ‘silvery grey’, and it seems to work. Has lasted through a winter in the Scottish Highlands and will observe over the summer period.

Quality product, best timber oil on the market

I coated the wood with another Osmo product after applying the base-coat. The wood easily absorbed this base coat which appeared to get deep into the wood and was very easy to apply.

Does as it says on the tin. Used as a base cost with Osmo Natural Oil Woodstain over the top.

There isn't much to say really. It has the consistency of white spirit, and is very easy to apply. Time will tell if it is effective, but I would certainly use it again.

To be used in conjunction with Osmo u/v protection oil. Really does a job making the wood watertight.

Easy to use and appears to do what it says on the tin. Used on an oak framed carport 10 yrs ago. No signs of rot yet!