Shellac is a gift from the insect world to woodworkers everywhere. Could it be too old now? Once mixed with alcohol, shellac will start to react chemically, (search for esterification if you want to know more), and evaporation of the alcohol doesn’t get you back to where you started. Thread Tools. Storage of the dry flakes should be a few years. No nasty chemicals. First I ground the flakes in a coffee mill then stirred them very well and left them over night. Copyright © 2021 vBulletin Solutions, Inc. All rights reserved. Always dissolve shellac as and when needed. Site Designed & Maintained by Dreamz Interactive. Another factor in the shelf life of the flakes is how it is stored. Liquid shellac sold in hardware stores is often marked with the production (mixing) date, so the consumer can know whether the shellac inside is still good. Even if Shellac flakes are stored in a cool, dark and dry place, but older than 2 years (thumb rule), it will not dissolve completely in alcohol overnight when compared to fresh stock. When applied, it will be sticky and slow drying. After about two years, dewaxed shellac that has been stored in a cool, dark, dry place will dis-solve in alcohol more slowly, and some of it will not dissolve completely, forming a gelatinous mass at the bottom of the bottle. It is much cheaper then buying prepared shellac and you mix only what you need fresh. Just like … Therefore you can stock-up and mix only what is needed for the job at hand. Shellac … Mixed up the shelf life is supposed to be 6-12 months for blonde/super blonde dewaxed, and 1-2 years for an unopened bag of flakes. Shellac Flakes offered comprises wide range of quality Shellac flakes that are recognized for its excellent performance. Note: The 5 … I've always thought that if the shellac dissolved and then dried hard enuf to sand it was ok. And I know I've used some stuff that was WAY older than 2 years. The reason it’s mixed right before use is that once mixed with alcohol, shellac has a 6-month shelf life. If you use much shellac it makes sense to mix your own from flakes. I know the woodworkers when dissolving shellac to use as a finish consider it to have a shelf life … browsing data or IP addresses) and use cookies or other identifiers, which are necessary for its functioning and required to achieve the purposes illustrated in the cookie policy. Keep agitating for 24 hours. Even if Shellac flakes are stored in a cool, dark and dry place, but older than 2 years (thumb rule), it will not dissolve completely in alcohol overnight when compared to fresh stock. When applied, it will be sticky and slow drying. Darren. In excellent storage conditions, shellac flakes can last many years (storage conditions from 40F to 50F at <40% RH are suggested). Powered by vBulletin® Version 4.2.5 Brewing up your own batch when it is needed will save money while giving you control over the product. We sell our shellac in plastic bags with a desiccant and an oxygen absorber. I've always thought that if the shellac dissolved and then dried hard enuf to sand it was ok. And I know I've used some stuff that was WAY older than 2 years. Keep the flake cool, dark and tightly sealed. Higher temperature, not even that high, (75 degrees and above) causes dewaxed shellac to clump, especially when it is a large sack and under weight. According to an article by Jeff Jewitt that I just read all shellac, whether mixed or flakes has a shelf life. Practical Machinist is the easiest way to learn new techniques, get answers quickly and discuss common challenges with your peers. Here are some insights about how to judge when it is no longer useful. Refrigeration extends the shelf life. Most people buy pre-made shellac, but shellac has limited shelf life, and the big pre-made shellac companies do not put any date or date code on the cans. Shelf life of shellac flakes. We'll bring you the most relevant peer-to-peer conversations happening in the trade and tips and tricks to help you get the job done. The biggest problem comes about when shellac … Shellac flakes have a finite shelf life unknown to most users. Some of its features include availability in de-waxed and waxy grades, comes in many warm colors from very light … Shellac has a limited shelf life. It finds use in different applications like for woodwork, cabinetry, guitar making, finishing! A tremendous polish at extremely thin layers the thing about shellac is used after date. Unfortunately, there ’ s a natural resin secreted by insects in parts of India Southeast... 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