Gizmo Dorks PEI Sheet 12" x 12" (305mm x 305mm) 1mm Thick 3D Printer Build Surface Ultem 1000, Made in The USA

Buy this product! Being new to 3D printing, I tried the sheets of masking tape that came with the printer on the print bed. MISTAKE!!!What a mess. Next, the blue painter's tape route. While this worked pretty well, it kept getting torn up each time I removed a print. Then it was usually necessary to re-tape the entire bed. That got old real quick. After reading some reviews, I decided to plunk down what I thought was a lot of money for a piece of "plastic". Boy, was I wrong. I've been using this for several days now and it has worked great. I just clean it with some rubbing alcohol before the next print and every thing works fine. I've only been using it with PLA so far and have the bed set to 60C. (although this may not be necessary), but the filament adheres beautifully and comes off very easily when done. No need to use a spatula. Things may change when I start using different types of filament, but so far I'm very pleased.

It has worked very well so far for PETG. It is also very easy to cut to size using a razor blade. I have mine installed atop the metal build plate on my CR10 and it stays very flat, as long as you use extra binder clips. The finish on the floor of the parts is like glass. Both sides of the plate will have a protective layer that you most definitely should peel off. It was hard to tell it had this layer on one of these sides, so it may be easy to forget it's there. Adhesion has been excellent even without a brim.

This plastic sheet really does do wonders for your 3d printer. Before I bought this, I was going through rolls of blue painters tape. It was pretty crazy. After I bought this, it has become the base for a bunch of prints. I still use spray on glue, glue stick sometimes. Sometimes I just use this. But, it cleans off well and you can reuse it a ton of times. Be careful when you're cleaning it, particularly if you are scraping it because you could gouge it pretty easily. I use goo-gone and let it set for a while if I have a bunch of glue that needs to be scraped off. But, overall, this is a good, flat, long lasting, base that stands up to the heat of printing ABS, PLA, etc.

Works pretty well only complaint is on large prints I am using a cr-10 on the left and right sides are lifted up and am not able to put a clip to pull it down. You could glue the sheet to the glass but in my opinion that defeats the purpose to be able and take the sheet off and flex it to easily get larger prints that have stuck really good off

PEI is a must have (in my opinion) for 3D printing. I get great adhesion with this without needing to resort to glue, hairspray or anything else. I find that for best results, I have to print with a brim because it helps with removing the finished product. Sometimes I also have to pour a little isopropyl alcohol right next to the print/brim to help get it off, but that's okay because I use the alcohol to clean the bed anyway. You'll also want to make sure your bed is level...use a sheet of notebook paper and adjust the bed until the nozzle is grabbing at the paper. This helps "squish" the filament into the bed, giving that good grip, at least, that's what you should do for ABS and PLA. If you're printing in PETG, use a business card or a 2mm feeler gauge.

Followed the instructions on their website regarding cleaning with alcohol and even tried sanding the sheet per the recommendation if prints don’t adhere. I couldn’t get anything to stick. I know how to properly level a bed and had no issues with adhesion before using this sheet (I bought this to try to make removal easier).

In reading comments and experimenting I've found helpful mention of sanding possibly before first use and definitely using it with hair spray if you're printing PETG to keep it from adhering too well. I just have mine attached to the bed with binder clips as it makes cleaning and prepping the sheet easier and you can have more than one sheet prepared in advance. You can also remove the printed sheet and pop it in the freezer to cool down if you're in a hurry. Very handy. Clean with isopropyl alcohol before a fresh coating of hair spray. UPDATE: I like it even more with time. I find I don't need hairspray for PETG with a bed temperature of 60C. The same as PLA. ABS works well at 110C. TPU sticks like glue at any temperature.

I was having problems with build plate adhesion on my CR10S despite being leveled/taped/glue-stick/mirror tile/hairspray/borosilicate glass/ect. Then I tried this PEI sheet and I went from about 50% fails(first layer & shifting mid print) to <1%, usually caused by failure to re-level after to many prints, or other user/printer errors.I have done over 2k prints on it so far, after about 100 or so it started to look pretty gnarly with scratches, so I took some sandpaper to it, while it no longer does mirror finishes the gripping properties are unchanged.Some Cons:The bed must be heated to 55c or so, for even PLA to stick, you should also allow it cool to 45c or lower before you attempt to remove it.You need to get some adhesive transfer sheets(or maybe use some other method) to stick this to your bed. Clipping it down isn't going to cut it, it will warp when heated if not properly secured.Not really a con considering what most of us have used for bed adhesion, you should clean it with 90% (might get away with the 70 not sure though) Isopropyl alcohol every few prints.Notes:I have only printed PLA/PETG so far, If I happen to print some different materials I will update this review.I had purchased another one almost a year ago expecting the first one to fail eventually... at this point I think the printer may go first.

I was totally skeptical, but getting kinda desperate to find something long lasting for my printer bed. Wow, this stuff is crazy good! It appears to work with static electricity, if you rub a sheet of paper against it, the paper sticks harder and harder the more you rub it. I followed the instructions and laid this on my print bed with NO adhesive behind it, just clipped the corners. Once it heated to around 60C it lay perfectly flat, but now if a print sticks a little I can just peel-off the backing! Prints are actually SHINY, you can see your reflection in the bottom layer. Overall, I am just blown away. Wish I would have spent the money on this in the first place.