Use a DEWAXED Shellac Flake to make a universal sanding sealer / primer / undercoater and as a transitional coating between dissimilar finishes. Their "Sealcoat" and the aerosol (spray can) shellacs do not contain wax. Less alcohol required. The Zinsser cans I've seen (and just checked online) are pretty clear about what's in them. Contributes to an ultra-smooth final finish. However, the acid interferes with water base finishes. Zinsser Clear Shellac is a 'waxed' shellac product. Zinsser seal coat is a 2 pound cut of blonde dewaxed shellac. For the last couple years Zinsser has been adding a little acid to the shellac and seal coat to extend the shelf life. That said, I think the use of dewaxed shellac, which I get in the form of Zinsser SealCoat™, is a great way to pre-seal end grain if you want to prevent excess stain from being absorbed there. This de-waxed shellac solution eliminates the toughest odors—food, pet urine, cigarette smoke and more—and won’t yellow with age. They chose to call it a sanding sealer to take advantage of its use for that purpose. Use a Dewaxed Shellac when the top-coat, for extra water & alcohol resistance, will be a varnish, lacquer or urethane. This is normal. Now, don't get me started on the date code! Save time when finishing porous woods by starting with Rust-Oleum® Zinsser® Bulls Eye® Sealcoat Universal Sanding Sealer. 2) It can also be used as a wood conditioner when you are staining woods prone to blotching -- … Shellac forms a hard (brittle) film and when applied over a softer (more flexible) finish like most WB finishes or oil-base finishes, it is prone to cracking. This type of shellac must be mixed, stirred or shaken to homogenize the wax, shellac and carrier (alcohol). This high-building solution seals the wood to create a surface that can be easily sanded. SealCoat Universal Sanding Sealer is a solution of 100-Percent wax-free shellac in denatured alcohol. When settled, the wax appears as a milky layer at the bottom of the container. While wood conditioner helps in that situation, it is often not adequate. Mike, the Zinsser SealCoat is a 2# cut blond dewaxed shellac pure and simple. I mix my own shellac from flakes and find it takes forever to settle out the wax with gravity. Shellac is 'waxed' in many varieties. Bullseye shellac does contain wax. Dewaxed shellac is especially useful for two purposes:1) Water based finishes will raise the wood grain, which you can avoid entirely by first sealing the surface the the dewaxed shellac. Formulated using a patented process, SealCoat is guaranteed to … My local borg finally got a 'fresh' shipment of SealCoat. Zinsser Shellac is the natural product with wax. To permanently block odors without changing a surface’s appearance, choose Rust-Oleum® Zinsser® CLEAR B-I-N® Sealer. Andy Rae: The quickest way I know is to buy dewaxed shellac flakes or, even faster, buy dewaxed shellac, sold in the form of Zinsser® SealCoat. Rust-Oleum Zinsser 854 1-Quart Bulls Eye Sealcoat Universal Sanding Sealer From the Manufacturer. Zinsser SealCoat is the de-waxed product and states it on the face of the label: "100% Wax-Free Formula". Zinsser Seal Coat is a dewaxed shellac product. Even though you only get 2/3 as much actual shellac, it is often more expensive. Please Read: Denatured Alcohols & Shellac Solvents- All Denatured Alcohols are NOT the Same Any shellac can be used as a sanding sealer as well as a standalone finish. Luckily, it's easy to repair. It is perfectly usable as a standalone shellac finish. Shellac doesn't go down like varnish - it seems to be going down like varnish and then it "suddenly" turns to goo as you attempt to brush it out. And simple Sealcoat Universal Sanding Sealer as well as a Sanding Sealer the shellac and carrier ( alcohol.! 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