Wisesorb 30Pcs 5 Gram 13X Molecular Sieve Powder Packs for 3D Printer Filament Storage, 3D Printer Filament Dryer

If you are into 3D printing, then you know how important it is to keep your filament as dry as possible. If your printer filament picks up too much moisture from the air, you will have popping, air gaps and stringing occurring when you print, leading to print failures. I picked up this 30 pack of absorbent (desiccant) packets to put into the bags where I keep my spools. I have been simply placing 1 pouch into my PLA filament, and I place 2 in my PET-G filament bags and so far they are very long lasting. There is a color indicator label on each pouch so you know when the absorbent is no longer working, it goes from a blue dot to a red dot when it is used up so it makes figuring out if it is still working a snap. I live in a low humid environment and so far of the 10 pouches I have used, only one has reached the end of its useful life after 6 weeks, the other 9 are still good. So yes, I definitely recommend these pouches for your 3D printing needs.

Nice packaging! Unfortunately don't do anything. Maybe I got a bad batch, but verified with electronic meter did not drop humidity from ambient. Extra star for quality of package. Every packet individually sealed in a nice tear-open bag! Sturdy box too.

I do 3D printing and use quite a bit of silica gel desiccant to store my 3D printing filament when not in use. The packets come individually wrapped in their own heat sealed plastic bag and they have a nice indicator square on the outside of the packet that turns from orange to dark green when they packet has absorbed the maximum amount of moisture. They seem to be more absorbent than a packet of silica gel, and I will buy more of them and use them instead of silica gel desiccant packets. I would definitely recommend them for storing your 3D printing filament and keeping it dry!

I've re-started 3D printing in the last couple of years and have moved to a more humid location. Have recently invested in a filament dryer, mostly because I don't really know how much moisture might have been impacting my filaments. This seems like a very high-quality product and package. Versus silica gel's (which wisesorb also sells) 15-20%, this can absorb moisture down to <10% RH. But it can also only absorb about 20% of its weight in water versus 40%-ish for SG. These are 5g packets, dry open packets weight ~6g: 1g for the package seems reasonable. After the window turns, it weighs 7g. So that's right at the 20% mark, but also only 1g of water. Nonetheless, I ran several spools through the dryer with a packet of this at the bottom and didn't get it to turn. So #1, I guess my worries about humidity are likely not justified. Had to leave the packet in the garage to saturate the packet and get the indicator to turn. So it seems to work well, as well as I could need it to. The indicator is not as definite as I would like to see, kinda turns "grey" instead of orange. But most SG packets I save have no indicator at all, so who knows how much they have left in the tank? At about half a buck per packet for an absorption capacity of only 1g and not being really renewable, this is probably a bit of overkill for my situation. I'll definitely think about some Wisesorb indicator SG when this pack is exhausted. But as dry as I seem to be, that's probably going to be a while.

I do a lot of 3D printing, and my printers are located in our basement which can be humid. I constantly struggle with various ways of drying and keeping filament dry because the print results are extremely noticeable, so I decided to try these molecular sieve packs from Wiseorb after seeing all of the hype. Unfortunately, I’m not impressed. While they do work, I don't see a reason to spend money on them. I don't have the equipment to precisely measure the moisture level in filament, so I used an accurate scale to get an idea of weight loss over time. I weighed a roll of PLA filament (517 grams) that had been sitting around for a long while then placed it into a vacuum-sealed bag with one of these packs. After five days, I took the filament out and weight it again. It had lost one gram of weight. Disappointed with the results, I placed the filament in a dryer for ten hours then weight it again. It lost twelve grams. Here is how I look at it. - Storing filament: I believe these packs can absorb more moisture than standard silica gel packs, but silica gel packs can be dried and reused, and neither dry the filament in a reasonable time frame. - Drying filament: If the goal is to dry filament, then a dryer is easily the better option. Overall, I can't justify regularly spending money on disposable packs when I would most likely need to place the filament in a dryer anyway. I will be going back to simply storing my filament in plastic bins with silica gel packs that I recharge every couple months. If I have a critical print, I'll place the filament in a dryer the night before, and it print great.

I tested these absorbers by placing a humidity sensor in an airtight sealed plastic container with one of the packets of powder. I did the same test with a packet of silica gel. For both tests I waited 24 hours and read the final relative humidity value. For these packets, I got a final humidity of 11%. For the silica gel, I got a final humidity of 15%. Depending on your application, this may be worth the switch from silica gel. But for me, since these are not able to be reused, I think silica gel is a better value. I will still use these for my filaments, but when I run out I think I'll just go back to my reusable silica gel packs.

This is a nice alternative to silica gel dessicants often used to preserve 3D printing filament. Humidity is the enemy of filament and can render it non-useable. What I like about these packs is the indicator on the package that their dessicant properties are spent. This is because I use my 3D printers infrequently with long periods between printing. While I store my filament in bags with dessicants, I don't check them or recharge the silca gel dessicants as often as I should. So, for me, this is a great option. I have been using these and haven't yet reached the point of absorption and the need for disposal. I will try to update this review when I get an idea of how often these need to be replaced.

Wisesorb is a major manufacturer of molecular-sieve products including desiccants. This pack is geared toward 3D printing enthusiasts who need to store filament in humidity-controlled conditions, particularly those who lean toward individual vacuum bags for each roll of filament. (At five grams, they're too small for larger air spaces like plastic storage tubs.) Molecular sieves can lower the humidity in a sealed environment to zero, or near enough to it, given time. They're extremely effective, at least in industrial processes. And these are a good choice for storing filament; they're well-designed for that task, including a visual indicator of remaining life. The thing is, unlike silica gel, molecular sieves are a one-and-done product. While it's technically possible to recharge them, doing so requires an industrial vacuum oven to heat them to around 350°F in a hard vacuum. So for the home 3D printing enthusiast, these are disposable. While they're very effective at reducing humidity in a small, enclosed space, the fact is that most filament doesn't need to be stored at 0% RH. Most filament is fine at 15–25% RH, and silica gel accomplishes that easily at a lower cost—and is easily reusable. So why would you buy this? Well, there are some filaments that DO want very low RH, such as TPU/TPE. For those filaments, especially if you rarely open the package, a molecular sieve like this could be just the thing and worth the expense to preserve the filament. Or if you hate recharging silica gel and have disposable income, they're certainly a flex. I'm not saying "don't buy this," not at all. Just, you may not need to buy this. If you do, this is a good product to buy.