Drying
Which filaments absorb moisture, and how do I tell if filament is wet?
First in this ranking: SUNLU PLA.
- Nozzle190–230 °C(374–446 °F)
- Bed50–70 °C(122–158 °F)
- Speed—
- Dry50–55 °C(122–131 °F)for 8 hManufacturer drying table →
- Density1.26 g/cm³
Drying. Source: SUNLU TDS · Last checked 18 October 2026
Ranked filaments
| Rank | Filament | Material | Nozzle | Bed | Datasheet | Buy |
|---|---|---|---|---|---|---|
| 1 | SUNLU · PLA | PLA | 190–230 °C (374–446 °F) | 50–70 °C (122–158 °F) | — | |
SUNLU PLA lists 190–230 °C (374–446 °F) and a bed of 50–70 °C (122–158 °F). Drying on the row is 50–55 °C (122–131 °F) for 8 h from the SUNLU wiki. The PLA pop thread printed at 200 °C (392 °F) and a 60 °C (140 °F) bed. Both numbers sit inside this row. | ||||||
| 2 | Polymaker · Polylite PLA | PLA | 190–230 °C (374–446 °F) | 25–60 °C (77–140 °F) | Datasheet | |
PolyLite PLA lists 190–230 °C (374–446 °F), a bed of 25–60 °C (77–140 °F), and drying at 55 °C (131 °F) for 6 h. 200 °C (392 °F) and 60 °C (140 °F) from r/FixMyPrint 1098exl sit on this row. 60 °C (140 °F) is the top of the bed. | ||||||
| 3 | SUNLU · PETG | PETG | 240–260 °C (464–500 °F) | 60–70 °C (140–158 °F) | — | |
SUNLU PETG lists 240–260 °C (464–500 °F) and a bed of 60–70 °C (140–158 °F), checked 19 October 2026, and drying at 60–65 °C (140–149 °F) for 6–8 h. The PETG bubble post is at 235 °C (455 °F), which is below this nozzle. | ||||||
| 4 | Bambu Lab · PETG HF | PETG | 230–260 °C (446–500 °F) | 65–75 °C (149–167 °F) | Datasheet | |
PETG HF technical data sheet. Nozzle 230–260 °C (446–500 °F), bed 65–75 °C (149–167 °F), drying at 65 °C (149 °F) for 8 h. 235 °C (455 °F) from r/prusa3d 1mndze5 sits inside this nozzle. The leading replies on that thread blame a random Z seam, and a score-14 reply adds that it might be wet. | ||||||
| 5 | Overture · Easy Nylon | PA6 | 245–260 °C (473–500 °F) | 50 °C (122 °F) | — | |
Overture Easy Nylon lists 245–260 °C (473–500 °F) and a bed of 50 °C (122 °F) from the Open Filament Database. The catalog stores drying at 95 °C (203 °F) for 7 h. Nylon is the high-drying row in this set. The five threads do not print nylon. | ||||||
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Wet filament in this bank is a sound and a hole, not a brand list. Dry the spool to the temperature on its own row.
The pop
r/FixMyPrint 1098exl is PLA at 200 °C (392 °F) and a 60 °C (140 °F) bed, with a gap right after a pop. The score-80 reply says the water boils in the nozzle and the vapor blows a pocket in the extrusion. A score-17 reply says a new spool can already be wet. A score-12 reply says a pop can be an air gap after a hotend was tightened cold.
200 °C (392 °F) and 60 °C (140 °F) sit inside SUNLU PLA, which lists 190–230 °C (374–446 °F), a bed of 50–70 °C (122–158 °F), and drying at 50–55 °C (122–131 °F) for 8 h. They also sit inside PolyLite PLA, which lists 190–230 °C (374–446 °F), a bed of 25–60 °C (77–140 °F), and drying at 55 °C (131 °F) for 6 h. 60 °C (140 °F) is the top of that bed. How to dry, and how the community bands differ from these sheets, is drying. Closed storage is storage. The measured table is the filament drying dataset.
PETG bubbles
r/prusa3d 1mndze5 is bubbles in PETG on a CORE One, 0.4 mm nozzle, 235 °C (455 °F). The score-88 reply asks if the Z seam is random. The poster says it is, and the next replies treat that as the cause. A score-14 reply says it might be wet. 235 °C (455 °F) is inside PETG HF at 230–260 °C (446–500 °F), and below SUNLU PETG at 240–260 °C (464–500 °F). SUNLU's drying line is 60–65 °C (140–149 °F) for 6–8 h. PETG HF lists 65 °C (149 °F) for 8 h.
Overture Easy Nylon lists 245–260 °C (473–500 °F) and a bed of 50 °C (122 °F), and the catalog stores drying at 95 °C (203 °F) for 7 h. The threads do not print it. It is here because nylon is the high-drying material in the catalog set. PLA, PETG, and nylon are the material pages.
Threads that say absorb and mean something else
r/prusa3d 1ilu19b is a CORE One "absorbing heat" for about 7:40 before PETG. The score-71 reply says an unenclosed MK4 has only the room to soak. A score-53 reply says the gcode is waiting on a chamber temperature.
r/3Dprinting 11u348w and r/functionalprint 11u37q5 are the same laser-level case joke. The title mentions an ABS shell and a flexible outer. The top comments are not a moisture test. SUNLU and Polymaker are the brand indexes.
Pros and cons
Pros
- The pop-then-gap description is quoted from the highest-scored reply on the thread that recorded the pop.
- Drying temperatures stay on the product row and on the drying dataset.
Cons
- r/3Dprinting 11u348w and r/functionalprint 11u37q5 are the same laser-level joke. They do not diagnose wet filament.
- The PETG bubble thread's leading replies say the Z seam is set to random. Wet filament is the score-14 alternative, not the consensus of that thread.
Printer considerations
- Brand-new filament can still be wet. That is a score-17 reply on r/FixMyPrint 1098exl.
- Popping is not always moisture. A score-12 reply on the same thread describes an air gap after a hotend rebuild that popped.
- r/prusa3d 1ilu19b is a CORE One waiting about 7:40 before PETG. The leading comment says an unenclosed MK4 has only the room to heat. That wait is chamber heat, not a wet spool.
What the community says
r/FixMyPrint 1098exl shows gaps that appear right after a pop, printing PLA at 200 °C (392 °F) and a 60 °C (140 °F) bed. The score-80 reply says the pop is water boiling in the nozzle and the vapor blowing a hole in the extrusion, and says to dry the spool. A score-21 reply describes the same steam gap. A score-17 reply says filament can arrive wet. A score-12 reply says popping is not always moisture and describes a hotend rebuilt at room temperature that left an air gap. r/prusa3d 1mndze5 shows bubbles in two PETG spools on a CORE One with a 0.4 mm nozzle at 235 °C (455 °F). The score-88 reply asks if the Z seam is random. The poster says it is. Two more replies treat the random seam as the cause. A score-14 reply says that, or it is wet. r/prusa3d 1ilu19b asks why a CORE One absorbs heat for about 7:40 before PETG when an MK4/S does not. The score-71 reply says an MK4 without an enclosure has only the room to heat. A score-53 reply says the gcode is waiting on a chamber temperature. r/3Dprinting 11u348w and r/functionalprint 11u37q5 are a joke about a laser-level case. The title says ABS and a flexible shell. The top comments are jokes.
- Community source, r/3Dprinting 11u348w
- Community source, r/functionalprint 11u37q5
- Community source, r/prusa3d 1ilu19b
- Community source, r/FixMyPrint 1098exl
- Community source, r/prusa3d 1mndze5
Sources & notes
Accessed 20 October 2026.
- SUNLU filament wiki manufacturer
- SUNLU PETG product page manufacturer
- PolyLite PLA technical data sheet datasheet
- Bambu PETG HF technical data sheet datasheet
- Open Filament Database, Overture Easy Nylon other
- Community source, r/3Dprinting 11u348w reddit
- Community source, r/functionalprint 11u37q5 reddit
- Community source, r/prusa3d 1ilu19b reddit
- Community source, r/FixMyPrint 1098exl reddit
- Community source, r/prusa3d 1mndze5 reddit
Related questions
Questions
What does wet filament sound like in these threads?
On r/FixMyPrint 1098exl the score-80 reply says a pop is water boiling as it hits the hot nozzle, and the vapor leaves a hole. A score-12 reply on the same thread says a pop can also be an air gap in a rebuilt hotend.
Are the PETG bubbles moisture?
The score-88 reply on r/prusa3d 1mndze5 asks about a random Z seam, and the next replies agree after the poster checks the slicer. A score-14 reply says it might be wet instead. The post's 235 °C (455 °F) sits inside Bambu PETG HF's 230–260 °C (446–500 °F) nozzle and below SUNLU PETG's 240–260 °C (464–500 °F) nozzle.