FAQ - Questions fréquemment posées

  1. Why is it so important to apply at least 6 coats of D2?
  2. Can I use DEKS OLJE D2 without applying DEKS OLJE D1 first?
  3. I have previously used another type of varnish on my woodwork but now wish to use D2. Can I apply D2 on top of it?
  4. I wish to maintain my existing coating with D2 but areas have worn down to bare wood. How should I proceed?
  5. How does D2 differ from other types of varnish?
  6. How long will 6 coats of D2 last on my teak cap rail, which gets full exposure to the sun?

Why is it so important to apply at least 6 coats of D2?

DEKS OLJE D2 is a very flexible oil-based varnish that provides a thinner film on the surface compared with a polyurethane or epoxy varnish. 2 to 3 coats of D2 are equivalent to 1 coat of polyurethane varnish. The slow-forming film and the very nature of DEKS OLJE D2 are what give it its flexibility, allowing it to dilate and contract with the wood without cracking or flaking. 

Can I use DEKS OLJE D2 without applying DEKS OLJE D1 first?

No, the "Deks Olje" system is based on saturating the wood with DEKS OLJE D1 first. This ensures the wood's complete protection and must be done in all cases to be able to use DEKS OLJE D2, otherwise stains will appear due to the infiltration of moisture and air in the wood.

I have previously used another type of varnish on my woodwork but now wish to use D2. Can I apply D2 on top of it?

While we always recommend that any existing coatings are completely removed, in order that the very best performance is got from Deks Olje when the complete system is applied. We also recognize that there are times when this is not practical or possible and in these cases suggest the following guidelines.
D2 is a natural oil varnish and therefore by its nature is softer and more flexible than the normal varnishes/finishes used on a boat .i.e. polyurethane, 2 component (epoxy) or alkyd varnishes. These types of varnish/finish become brittle overtime leading them to crack, peel and flake. Unlike D2, they do not have the flexibility and therefore movement that D2 has. This means that while D2 will move with the timber and coating it has been applied to it cannot stop the coating underneath eventually breaking away from the timber. The fact that the 2 coatings will move at different rates, means there is a possibility of delamination between the original coating and D2.
To avoid the possibility of delamination, it is important that any previous coatings are thoroughly abraded using 100grit paper to ensure proper adhesion of the D2. While in most cases applying D2 on top of an existing coating will be for maintenance purposes only, we still suggest applying the required number of coats of D2. This is because even though you are applying D2 on top of an existing coating and creating a good film on the timber, the D2 only gives a thin film build per coat. If the proper number of coats of D2 is not applied, the correct film thickness will not be achieved, leading to a shorter time to first maintenance of the D2. 
We do not recommend applying D2 on top of any 2 component (epoxy) finish as these types of finish are designed to give a thick and very hard film which has little flexibility.
Note: We recommend that a small test area is carried out to ensure compatibility between the two finishes.

I wish to maintain my existing coating with D2 but areas have worn down to bare wood. How should I proceed?

Thoroughly abrade the entire surface with 100 or 120 grit paper to remove any loose material and form a good key for the final finish coats
Any bare areas of timber should be thoroughly cleaned and edges of good coating feathered in to take off the sharp edge.
Saturate any bare timber with continual wet-on-wet applications of D1 until it will absorb no more D1 i.e. it floods on the surface. The number of applications of D1 will depend on the absorbency of the timber. It could be as little as 6 applications or as many as 10 or more but you should be able to apply all of these in a day.
Allow D1 to set-up and dry - 3 days
Areas treated with D1 should now be coated with the required number of D2 coats to bring it up level with the existing finish.
If you then wish to finish the whole item with D2 see section above, entitled "I have previously used another type of varnish on my woodwork but now wish to use D2. Can I apply D2 on top of it?"

How does D2 differ from other types of varnish?

Epoxy, clearcote and varnishes - polyurethane etc, all become brittle overtime due to the suns UV rays, causing them to crack, peel and flake, which in turn allows water to enter the cracks etc causing more peeling and flaking, this leads to water (moisture) getting trapped under the finish causing staining, usually black in color. 
Unlike these finishes, if D2 is worn back to bare wood, then moisture cannot enter the timber, since it has been saturated with D1, which will prevent this. D2 is a traditional oil varnish and while not as hard as those finishes already mentioned, requiring more coats to achieve the correct film build, it does mean that it is flexible and will move with the wood as it expands and contracts while not becoming brittle. 
Unlike other varnishes there is no sanding between coats of D2 and when it's considered that even some epoxy varnishes require a minimum of 4 coats, sometimes more, that's a lot of time and sanding labor that is being saved. D2 can easily, be invisibly patch repaired, negating the need for a full strip, which is needed with the other finishes. Why? Because other finishes will have let water in to the timber as described earlier and the only way to remove any staining is to strip back to bare wood. With epoxy finishes this usually entails a full strip of the item needing maintenance.

How long will 6 coats of D2 last on my teak cap rail, which gets full exposure to the sun?

It is not possible to put an exact period on this as it very much depends on where the boat is located. Full exposure to the suns UV rays in say the Caribbean will be more intense when compared to the same exposure in the UK at the same time of year. Plus the Caribbean has full sun all year round, where as the UK has a winter with little or weak sun and therefore weak UV rays. Another factor that affects the life of D2 is general maintenance in the form of washing the surface with fresh clean water to remove dried on salt crystals, which will further intensify the affect of the UV rays since they act like a magnifying glass on the finish. Allowing for these two extremes, 6 coats of D2 will last between 12 months to 5 years depending on, weather, wear and general maintenance.