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Bona Bona ClassicSeal ClassicSeal may have the word “seal” in its name, but it is designed to be a base or primer coat onl.. Product #: BNCLS Regular price: $72.00 $72.00

Bona ClassicSeal

Brand: Bona

Price: $72.00

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ClassicSeal may have the word “seal” in its name, but it is designed to be a base or primer coat only! It is the foundation or first coat of a three-coat water-based system, so don’t just use it for all your layers, thinking you are being clever and saving money. This is not meant to be the tough outer layer – it is designed to a bonding layer. It is runnier than Bona’s topcoats (Mega or Traffic) so that it soaks into the wood and grabs hold. Those high-solid topcoats just don’t go into the wood as well as a sealer does. But the topcoats adhere easily and well to this sealer. And layers of polyurethane are only protective if they can bond to each other. Seal coats like this help prevent “side-bonding” which is the tendency for strong finish coats to literally glue boards together along their edges, which prevents floorboards from gapping evenly during the dry seasons. And finally, sealers are an important first coat on oak floors because topcoats are known to pull the tannin up out of the grain and into the finish, leaving blotchy appearance.

Bona makes six different sealers, each a slightly different under-color. ClassicSeal is the clearest of the six – it does not add the warm, amber color that oil-based sealers or polyurethanes do. But, it also does not hide the underlying pink tones of red oak, for example. This is neither good nor bad – but it is an important aesthetic truth that you need to know about this product before you choose it! If you need color in your wood, you should stain your wood first or use an amber basecoat. You cannot tint this coat!

ClassicSeal is designed specifically to work under either two coats of Bona Mega or two coats of Bona Traffic. It is a foundation coat only. But it lets those topcoats be all they can be.

ClassicSeal has one challenge: it can be very difficult to sand it. Why would you need to sand it? If you applied a coat of ClassicSeal and it raised the grain and felt too rough for your preference. Or if some debris landed in the wet coat and you wanted to sand it out. If you try to use a traditional buffer with an abrasive screen under it, you will find that the ClassicSeal balls up like rubber cement, even when perfectly dry. Our trick is to use a combination of man-made steel wool and mini sheets of sandpaper to keep the surface cool and free of little gummy balls. Read more and even buy this solution HERE.

Available in gallons only
Sealers do not come in different sheen levels; choose you sheen level with your topcoats

This product is not freeze-thaw stable, so don't let it freeze. Because we ship this product from Minnesota, there will be some days when simply can't ship this product until weather conditions improve. Call the store at 651-698-5888 if you are trying to order in winter and have a tight time deadline.