Purifying reclaim comes down to dissolving it in a solvent, removing the waxes and particulates, then evaporating the solvent completely. The process is essentially the same winterization technique used in commercial cannabis extraction, scaled down for home use. Reclaim can contain 23% to 58% THC along with smaller amounts of other cannabinoids, so cleaning it up is worth the effort if you plan to reuse it.
What You’re Actually Removing
Reclaim picks up several types of contaminants as it collects inside your rig. Carbon particulates from combustion give it that dark color. Lipids and plant waxes that survived the original extraction process get concentrated. Water residue from the rig itself mixes in. And depending on how long the reclaim has been sitting, oxidized compounds contribute to the harsh taste. Purification targets all of these, leaving you with a cleaner, smoother product that’s golden rather than black.
Choosing the Right Solvent
You have two practical options: high-proof ethanol (like Everclear at 190 proof) or 99% isopropyl alcohol. Ethanol is the safer choice if you plan to eat the final product, since any trace residue is food-safe. Isopropyl works well but demands thorough evaporation because you don’t want to inhale or ingest residual alcohol.
If you go with isopropyl, use 99% concentration, not 70%. The 30% water content in standard rubbing alcohol creates problems: it evaporates much more slowly, leaves behind water residue that makes the final product sticky and impure, and is less effective at dissolving the waxy buildup you’re trying to separate. The 99% version evaporates cleanly and pulls residues more efficiently. It is more flammable, so work in a ventilated area away from open flames.
Step 1: Collect and Dissolve
Start by collecting your reclaim. The easiest method is to pour warm (not boiling) water through your rig to loosen the reclaim, then let the water cool so the reclaim sinks and solidifies. Drain the water and scrape it out. Alternatively, pour your chosen solvent directly through the rig to dissolve the reclaim in place, catching the runoff in a glass dish.
If you’re working with reclaim you’ve already collected, dissolve it in your solvent at a ratio of roughly 10 milliliters of solvent per 1 gram of reclaim. Warming the solvent slightly (around 30 to 60°C for ethanol) helps it dissolve everything completely. Stir until the reclaim is fully suspended and the liquid looks uniform. At this stage the solution will be dark amber to brown.
Step 2: Freeze to Separate Waxes
This is the winterization step, and it’s what separates a basic cleaning from actual purification. Place the sealed container of dissolved reclaim into your freezer for at least 24 hours. As the solution gets cold, lipids and waxes become less soluble and precipitate out. You’ll see a layer of fatty material form on top of the liquid or clump together as visible particles throughout.
The colder you can get the solution, the more wax drops out. A standard kitchen freezer works fine. If you have access to a deep freezer, even better. Don’t rush this step. Pulling the solution out early means waxes stay dissolved and end up back in your final product.
Step 3: Filter Out Impurities
Once your solution has spent a full day in the freezer, you need to strain out the precipitated wax and any carbon particles. For a simple home setup, pour the cold solution through an unbleached coffee filter placed inside a funnel over a clean glass collection dish. The coffee filter catches most of the larger wax clumps and particulates.
For a cleaner result, filter twice. Run it through a standard coffee filter first to catch the bulk material, then pass it through a finer filter. Sediment filters used for water purification come in ratings from 2 microns to 100 microns. A filter in the 10 to 15 micron range catches most fine particulates. A 2 micron filter picks up even fine clay-sized particles, though it will filter very slowly. Keep your filters and funnel cold (put them in the freezer beforehand) so the waxes don’t re-dissolve when they touch warmer surfaces.
After filtering, the liquid should look noticeably lighter, shifting from dark brown toward a more golden, translucent color. If it’s still very dark, you can repeat the freeze-and-filter cycle.
Step 4: Evaporate the Solvent
Pour the filtered solution into a wide, flat glass dish like a Pyrex baking pan. A wider surface area means faster evaporation. You now need to remove every trace of solvent from the oil.
For ethanol, which boils at 78.5°C, place the dish on a hot plate or in a warm oven set to the lowest temperature (most ovens go down to about 77 to 93°C). The ethanol will bubble off gradually. For isopropyl alcohol, which boils at 82.6°C, the process is similar. In both cases, work in a well-ventilated space or outdoors. These vapors are flammable, and in an enclosed kitchen they can ignite from a stove pilot light or electrical spark.
You can also let the solvent evaporate at room temperature by leaving the dish uncovered in a ventilated area. This takes significantly longer (12 to 48 hours depending on the volume) but avoids any heat-related safety concerns. You’ll know the solvent is gone when the oil stops bubbling and reaches a thick, honey-like consistency. If you can still smell alcohol, it’s not done.
What the Final Product Looks Like
Properly purified reclaim is a golden to dark amber oil, much lighter than the tarry black material you started with. It will have a milder taste and smoother feel compared to raw reclaim, though it won’t match the flavor of fresh concentrate. The harsh, burnt taste comes largely from the carbon and wax you’ve now removed.
Testing of reclaim samples has shown cannabinoid content up to 60%, with THC ranging from 23% to 58% across different samples. You’ll also find 3% to 8% CBN, a cannabinoid that forms when THC degrades over time and with heat exposure. CBN has mild sedative properties, which is why reclaim often feels more relaxing than the original concentrate.
Using Purified Reclaim
Purified reclaim works for dabbing, adding to joints, or mixing into edibles. Since reclaim has already been heated during its first use, it’s fully decarboxylated. That means the cannabinoids are already in their active form, and you can eat it directly without any additional preparation. Mix it into a fatty food like peanut butter, a smoothie, or warm coconut oil to help with absorption.
For dabbing, purified reclaim performs noticeably better than the raw version. You’ll get smoother hits with less harshness and residue. Use a lower temperature than you would with fresh concentrate, since reclaim is more prone to burning and the cannabinoids are already activated.
If you’re mixing reclaim into edibles, start with a small amount and wait at least an hour before taking more. The THC content varies widely depending on what concentrates you originally dabbed and how much degradation occurred, so potency is unpredictable without lab testing.
Skipping Winterization for a Quick Clean
If full winterization feels like too much work, a simpler approach gets you partway there. Dissolve your reclaim in warm solvent, pour it through a coffee filter to catch solids, then evaporate the solvent. You’ll remove the carbon particles and loose debris but leave the waxes behind. The result will be cleaner than raw reclaim but not as refined as the winterized version. For casual use, this shortcut is often good enough and takes a fraction of the time.