My question would be why decarb shatter? You smoke it anyway and it will gives you the needed heat.
You decarb shatter for use in edibles to activate the THC from the THCA. We have an article that explains it well here: https://weedlist.shop/what-is-decarboxylation-how-to-decarb-cannabis/
For vaping it helps to prevent crystalization inside the vape cart.
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