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Installation
The Polyetherimide sheet comes with 3M 468MP adhesive already laminated to the PEI. Apply the PEI with slight pressure and at an angle to prevent and minimize air bubbles. Once applied set the print bed to 60C and apply pressure evenly across the PEI in a sweeping fashion to firmly set the adhesive. Please use a towel to avoid getting burned. Level the bed and set the height of the nozzle before printing.
If PEI is installed to the top surface of a bed sandwich (a build plate with multiple layers), it is recommended to install PEI on top of borosilicate glass.
Use
Heat the bed to the desired temperatures for printing (60 C for PLA and 100 C for ABS). Depending on how thick your bed sandwich is, your set temperature may not be your surface PEI temperature.
When the print is completed, let the bed cool, and the part will be easy to release from the PEI surface. Parts are actually easier to remove if released before the bed becomes completely cold.
Leveling the bed is very, very important when using PEI. You want the first layer to be close enough to be squished a little. PETG is an exception and doesn't like squished layers, in which case a Z gap should be used.
Maintenance
Clean in between prints with isopropyl alcohol and a lint free rag. Acetone can be used instead of isopropyl alcohol, but the bed must be cold if acetone is used. Optionally, light sanding with 600-1000 grit sand paper can be done after lots of printing to give the PEI sheet more life.
Compatibility
Anet A8 / Anet A6 / Reprap Prusa i3 / And more! PEI can also be cut to size by scoring with a hobby knife.
Dimensions
220mm x 220mm (8.6 x 8.6 inches)
PEI thickness: 0.56mm (0.022 inches)
3M 468MP adhesive thickness: 0.13mm (0.005 inches)
ED
Reviewed in the United States on October 3, 2022
I, too, was super careful with my first PEI sheet. No oils or fingerprints, IPA only, no spatula, etc. PLA was good. ABS wasn't great. PETg was better with magigoo. The only real advantage I saw was that it was indeed easier to remove once it cooled. It wasn't until it was damaged after a 100 hours of use that I was reading about how to restore PEI's grip and ran across SANDING! 400 grit to 220 grit. I did this and, whoa!, everything sticks like crazy now! Especially ABS (once you get the build chamber to around 100F or higher) and it never warps, as you can see in the attached picture of two yellow PCIe brackets that was printed in ABS - no raft, no brim. My only problem is ABS sticks too well, with perfect 1st layer heights. I found that once the build plate cools to around 50C, if you place alcohol all around the ABS print and let it soak in for about 5 to 15 minutes, most of the corners will let go from the seeping. I haven't even attempted PETg yet as it sticks too hard with ABS and PLA already.
Jack Waters
Reviewed in the United States on October 14, 2021
I've been printing mostly with PETG and bed heated to 110C directly on glass. When my bed is level, it works great. The print sticks during printing. After the bed cools, it pops right off. If my bed is not perfectly level, I get some curling at the edges.With ABS, even 110C doesn't give me great adhesion so I go up to 110C and perhaps tape edges down during print.With this, I've so far only tried PETG but definitely adhesion is higher and so far no pulling up at the edges. I still print at 110C and its definitely harder to get the prints off but I consider this an effective tool in the arsenal for improving adhesion - especially for big prints where it really matters.Also printed with TPU for what its worth and adhesion was also great.I don't yet have a handle on durability.
Kluntor Boogie
Reviewed in the United States on March 22, 2020
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E. White
Reviewed in the United States on January 28, 2020
I bought this to replace the stock surface on my little Monoprice IIIP Mini v1. After removing the old surface I cut this down a little on one side to fit my bed. I applied it by peeling back the adhesive cover liner a about an inch and a half and lined up the PEI sheet at one end of the bed and began applying pressure evenly across the sheet as I slowly continued to peel the adhesive cover back from underneath it. This allowed me to work it down from one end across the bed slowly to ensure that I did not get and bubbles. It sticks to my unheated aluminum bed plate really, really well. I hope this lasts for awhile because I'm not looking forward to trying to remove it but that's ok. I do not want this thing pulling up when I have a print that is stuck down hard. For my first few prints I got away with nothing but a clean PEI surface. Just an alcohol cleaning before the first layer went down. It worked very well. Then I had to use a little bit of glue stick to keep my prints adhering well and that is expected since my bed does NOT heat up. I have only printed PLA so I can't comment on other materials but this sheet is a great surface. I have only had a couple of prints peel up and they were very large, thick flat surfaces that seem to shrink and lift in the corners consistently. Now when I print those types of objects I know to put down blue tape and hairspray and that seems like it will hold down anything. My difficult adhesion issues are related to my printer and its part cooling capabilities, not this PEI sheet. I'm happy with my purchase and I will buy this from this seller again with no hesitation.
Jeff Karpinski
Reviewed in the United States on April 21, 2020
Only two 8-hour prints on it but so far, I'm impressed. I print nGen (PETG) exclusively and have been using hair spray on glass for ages. Worked well enough but I still had the occasional tall part pop off during a print. Saw the good reviews on this PEI sheet and figured I'd give it a shot.Installation is stupid-easy. Clean your glass, slap this on and trim the excess with a utility knife, if needed. Note there's also a protective plastic cover on the print surface - the instructions don't point that out. I didn't have any issues with trapped air bubbles. The sheet itself is rigid, but flexible enough to "roll" onto the glass without entrapping air. The 3M adhesive is crazy strong. Got my doubts it'd ever come off so when replacement time eventually comes, it'll probably involve new glass.PETG sticks EXTREMELY well to the heated PEI bed. In fact, I doubt there's any way to remove a part without destroying it or the PEI sheet while hot. Once the bed cools however, parts pop off just as easily as they did with my old hairspray on glass technique. After two prints I cannot see any detectable change in the PEI surface. Time will tell how well it holds up. I'll update accordingly here.
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