What is a vacuum purge?
Eleanor Gray
Updated on March 05, 2026
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In this regard, how long do you vacuum purge shatter?
You can do a full vacuum purge under -29.5" Hg vacuum and 115F in about 30 to 45 minutes, if you want shatter, and as long as it takes to turn that to wax, typically 8 to 24 hours.
Also, what temperature do you purge shatter? Shatter is around 90-100F before oil starts to wax but is fully purged. Once you're oil gets up to 130F or higher you run the risk of turning the oil into perma goo.
Furthermore, do you have to purge BHO?
You DO NOT need a vacuum oven to purge BHO for personal use. You DO NOT need a vacuum oven if you aren't sure how the process works.
How do you know when BHO is done purging?
If it's purged well, it should be transparent meaning you should be able to see through it like a film. If you can't see through it, there is still butane in the mixture. It wont be completely clear, but if you pull out a piece of shatter for example and put it over something you should be able to see through.
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