Slice Engineering Plastic Repellent Paint Repels Plastic & Prevents Buildup on the Nozzle | Get Enhanced Print Quality | Hassle-Free Application | Water-Based PTFE Nanosuspension (3 mL - 1 Pack)

I was skeptical at first—3 mL didn’t sound like much for the price—but after using Slice Engineering’s Plastic Repellent Paint, I’m convinced this little bottle punches far above its weight. If you’re tired of cleaning off burnt filament crust from your hotend or suffering from inconsistent extrusion due to buildup, this product is a game-changer. Pros: Actually Works: Once applied to the nozzle, filament just slides off like it’s scared to stick. Even when printing with notoriously sticky materials like PETG, there's significantly less gunk buildup. Easy Application: It comes with a precision brush built into the cap, so applying it to the nozzle is simple and mess-free—just don’t overdo it. A little goes a long way. Improves Print Quality: Cleaner nozzles mean more consistent extrusion. After applying this, I saw cleaner layer lines and fewer blobs on prints. Long-Lasting: Even though it’s only 3 mL, I’ve done multiple nozzles and still have plenty left. You’re not meant to slather it on—just a light coat does the trick. Safe and Water-Based: Unlike some mystery coatings out there, this one’s water-based and PTFE-based, which gives some peace of mind when using it near heating elements. Cons: Price per mL: It's not cheap, especially for such a tiny container. But considering how long it lasts and how much trouble it saves, I’d say it balances out. Needs Reapplication: Depending on your printing frequency and materials, you might need to reapply every few days or weeks to maintain the effect. Don’t Get It on the Heater Block Threads: It’s easy to be a bit sloppy at first. I recommend removing the nozzle for a clean coat or being really precise. Final Thoughts: If you 3D print often—especially with high-temp or sticky filaments—this paint is a fantastic quality-of-life upgrade. It helps reduce maintenance, improves print reliability, and keeps your hotend looking brand new. I’d recommend it to hobbyists and pros alike.

This has genuinely paid for itself in saving 2 (silicon carbide) nozzles from the blob of death. I thought I was cooked when I saw it bulging out from under the hot end cover but it didn't stick to the nozzle. It just fell off when the printer returned to the home position after cancelling. It's some a magic, bug spray for plastic. Things can still melt around the hot end but this will stop them sticking. Most situations it falls off during movement. You're going to need to reapply depending on how often you print and circumstances. After my save from the blob of death, I definitely reapplied. I have 3 printers that I typically run 4-10hrs a day and find I need to reapply every few days. I have no idea if it's a time or temperature/use situation. It seems to work like an advanced layer/mold release. Given it works on really hot metal I'm guessing a boron Nitride solution which after evaporating, leaves a release coating on the metal. It's a small bottle with a nail polish like applicator brush and dead simple to apply. It takes very little to cover the exposed parts of a nozzle. You need to apply prior to heating up the hot end or it evaporated but with so little needed it's dry by the time I'm done and back to my computer, start the print and the hot end is at business temperature. Ymmv on how good you are with keeping up with the application.

I am totally shocked at how well this works. I applied while my nozzle was cool, let it dry, and then began printing. Nothing stuck to the nozzle for a few prints, then it was time to re-apply. For me, it is totally worth the money and I will be buying again!

Worked great right out of the box—easy to brush on and it noticeably reduced plastic buildup on my nozzle for the first few weeks. When I came back a month later to reapply (bottle kept sealed), it went on milky, cooked into a white film, and then started peeling off the nozzle in flakes. Shaking/stirring and doing thinner coats didn’t fix it. I had to scrub the nozzle clean before printing. Verdict: nice results when the bottle is freshly opened, but the reapplication behavior is frustrating. Feels like a short shelf life.

I didn't have any packaging problems like some people. My bottle arrived if perfect condition. The bottle is glass now, I don't know if that has changed. Anyway, I have mixed results with this, especially when using with PETG. After applying liberally I can say it sometimes at least delays the accumulation of PETG on my nozzle, but the plastic death boogers will still inevitably form on the nozzle. I think it may help more to just increase the retraction distance over the stock profile. And this might just be an issue with PETG. With PLA it does seem to actively repel the hot plastic. I can't speak for ABS or any other filament type yet. I will also say it seems to wear off pretty quickly. You can tell when the nozzle is sufficiently coated because when it dries the painted area has a slight powdery layer over it. When that wears off it's time to re-apply. And in some cases this may mean painting it on after every print. Your mileage may vary. It seems like this tiny bottle will last a while though so I'll keep trying it out. Another thing to consider is this IS teflon, which is technically not something you want to handle or use with anything that contacts food surfaces, so that's something to consider here. That means it likely contains PFAS, PFOS or other fluoridated compounds. So that's just something to keep in mind. But it might be a non-issue for you. It does not seem to give off any fumes or anything though, at least not that I've noticed. That may be because it's water based. Anyway, this product seems to work in some conditions but it's usefulness is probably limited with PETG and will vary depending on your use. Still, I think it's worth trying out to see if it suits you.

great item, helped with filament sticking to the nozzle and curling as its being extruded leading to cleaner first layers and less stringing.

Many past complains about a flimsy bottle - this seems to be corrected. the bottle is heavy wall, rigid plastic, well sealed.

You coat just the tip, but that is more than enough 😏

I'm not sure what I'm doing wrong but I've got diamondbacks on my printer, every time when I apply a thin layer, on a clean nozzle it tends to somewhat stick and a portion of it kinda flakes off. I tried doing a second coat, it kinda sticks better? It seems to kinda do the job but I don't seem to be satsified with the result. Also quite expensive for so little.

works great