Comparison
99% Isopropyl Alcohol vs Resin Filter Funnels (Disposable): Which Should You Buy? (2026)
| At a glance | 99% Isopropyl Alcohol | Resin Filter Funnels (Disposable) |
|---|---|---|
| Rating | ★★★★⯨ 4.7/5 | ★★★★⯨ 4.6/5 |
| Price | $12-20 | $8-15 |
| Best for | Every FDM and resin printer owner. | Every resin printer owner, every pour-back. |
| Guarantee | Amazon return policy applies | Amazon return policy applies |
| Check Today's Price → | Check Today's Price → |
Let's clear something up before anyone spends money: these two products don't actually compete. 99% isopropyl alcohol is a solvent — it washes uncured resin off finished prints and degreases build plates. Disposable filter funnels work the other end of the job, straining cured flecks out of leftover resin before it goes back in the bottle. One cleans what comes off the printer. The other protects what goes back in.
So if you landed here because you can only order one thing this week, the real question isn't "which is better." It's "which failure am I closer to." Skip the wash and you get tacky prints that never cure right. Skip the filter and eventually a stray cured chip ends up in the vat — and that's how LCD screens crack and how one bad pour ruins the prints that follow. Both failure modes are real. One of them is a lot more expensive.
The two products
99% Isopropyl Alcohol
Cleans beds for adhesion and washes resin prints — a shop staple.
$12-20 · Amazon return policy applies
IPA is the more universal of the pair. It's the standard wash for resin prints, and it earns bench space next to FDM machines too — fingerprints on a build plate quietly kill first-layer adhesion, and a wipe with high-purity alcohol fixes that faster than any slicer tweak ever will. At $12–20 a bottle with a 4.7 rating, it's about as close to a mandatory consumable as this hobby gets, and it keeps for ages. The caveats are the boring, real ones: it's flammable, so store it away from anything hot; use it somewhere with airflow; and shipping restrictions vary by region, so it's sometimes simpler to grab a bottle locally.
Resin Filter Funnels (Disposable)
Strain cured bits out of resin so they don't ruin the next print.
$8-15 · Amazon return policy applies
The funnels are pure resin-printer territory. Every pour-back from vat to bottle is a small gamble that no cured debris rides along, and a paper filter funnel removes the gamble while cutting down on the general mess of resin handling. At $8–15 for a supply, the cost per pour is trivial next to the screen it's protecting. The honest downsides: they're single-use, so you're generating waste and you'll need to keep a stack on hand, and thick resin drains through them slowly — on a cold day, budget a few extra minutes and resist the urge to squeeze the funnel.
How to actually decide
Run your setup through this:
- FDM only: buy the IPA and stop reading. The funnels do nothing for you — filtering resin you don't own is not a hobby.
- Resin printer, already own some alcohol: funnels first. Unfiltered pour-backs are the pricier mistake, and most people don't learn that until after the repair bill.
- Resin printer, starting from zero: IPA first, because you literally cannot finish a print without a wash step. Put funnels on the very next order, not "someday."
The ratings — 4.7 versus 4.6 — are close enough to be noise. Don't decide on that. Decide on workflow.
Who shouldn't buy either? Honestly, almost nobody who owns a printer. The only person I'd wave off is an FDM user eyeing the funnels, or someone planning to store a big flammable bottle in a hot garage with no ventilation plan — sort the storage out first.
Bottom line
This is a "vs" in the title only. If you print resin, the two together cost less than most single accessories and cover both ends of the job: clean prints out, clean resin back in. If you're FDM-only, the alcohol alone is the buy. Either way, the worst option is the one most people pick by default — owning neither and finding out why they're on every essentials list.