A poster on one of my other forums asked about putting Cetol over top of varnish. Cetol appears to be an very oil modified varnish with pigment. It dries VERY soft. Will there be adheshion problems?
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Replies
Sikkens makes a number of products that are called Cetol. Some are water bourne others are oil based. There are stains as well as paints and top coats. Some can be put over existing finishes that are in good shape, others cannot. You would have to be more specific about the Cetol product and how it will be used. Proper application can be critical with these products, I'd contact the company first.
Beat it to fit / Paint it to match
It's Cetol Marine. As I mentioned, it's an oil based product. Their instructions say that it should be used over raw wood, but as we know that's often just for them. That's why I was looking for expertise here.
Sikkens doesn't make a product called Cetol Marine. They have clear exterior Cetol TGL, which is discontinued, Cetol Door and Window, Cetol SRD as well as SRD 250 and SRD RE. Cetol 1, Cetol 23, Cetol Dek. It doesn't make much difference unless the first coat was the log pre-treatment product or a base product. The thing with Sikkens clear oils is that they not only have to go on bare wood but that wood has to be sanded to remove mill finish, planer crush, airborne contaminants, etc. It has to be perfect. The application conditions have to be just right and you'd better be a good painter. It has been used on a few of my decks in the past but it hasn't stood up to northeast weather on those, and is a major pain to re-do. I don't think any of the Cetol products are recommended for marine use. Sikkens does make yacht paint. When you use a product professionally, you have to follow manufacturers application methods or the problems land back on you.Beat it to fit / Paint it to match
Hammer,
Many of us sailors use a product called Cetol Marine, made by Sikkens, also referred to by them as Marine Light, Marine Satin and Marine Gloss. It is in the West Marine.com catalog if you would like to see it. Unfortunately I can answer his question, but there is such a product that he is referring to. Others are also correct that there are many products sold with the Cetol name, such as finish for long homes, etc.
Woody
Here is a link to a four page application manual for Cetol marine.
http://www.yachtpaint.com/Images/15_21130.pdf
About the only place manufacturers instructions lie is about whether an oil based finish should be thinned. They sometimes shade the desirable number of coats to make their product look faster and easier, but this is only on the consumer grade stuff. For quality products there is also a technical data sheet that gives more, and more specific information about how to apply the product. For questionable brands pitched entirely to consumers, its like pulling teeth to get more information than is on the label. Perhaps thats a good measure of quality--the the manufacturer prefers the user to have knowledge that likely means they don't have anything to hide.
Hugh numbers of mistakes would be prevented by reading and following the manufacturers instructions. They don't want the customer to have failures.
I use this exact same product on my deck. You cannot use it over existing finish. It will not adhere. I have to power wash and strip very thoroughly before each re-application every 2 years. Otherwise, wherever old finish is, it just peels up. It's a one coat only application, also. Don't use 2 for the same reasons. You've only got one chance to get it right. It does look great when done properly, which is why I've been using it for 10 years.
Jeff
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