Watertight
What filament is best for bathroom/shower parts?
First in this ranking: Polymaker Polylite PETG.
- Nozzle220–250 °C(428–482 °F)
- Bed70–90 °C(158–194 °F)
- Speed50–100 mm/s
- Dry65 °C(149 °F)for 6 hManufacturer drying table →
- Density1.25 g/cm³
Speed, Drying. Source: Polymaker TDS · Last checked 18 October 2026
Ranked filaments
| Rank | Filament | Material | Nozzle | Bed | Datasheet | Buy |
|---|---|---|---|---|---|---|
| 1 | Polymaker · Polylite PETG | PETG | 220–250 °C (428–482 °F) | 70–90 °C (158–194 °F) | Datasheet | |
PolyLite PETG technical data sheet. Nozzle 220–250 °C (428–482 °F), bed 70–90 °C (158–194 °F), drying at 65 °C (149 °F) for 6 h. Ranked as a higher-heat catalog PETG, not as a spool the shower thread tested. | ||||||
| 2 | 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 SUNLU thread in this bank is a dryer vent reading, not a shower part. | ||||||
| 3 | Bambu Lab · ASA | ASA | 235–260 °C (455–500 °F) | 90–110 °C (194–230 °F) | Datasheet | |
Bambu ASA technical data sheet. Nozzle 235–260 °C (455–500 °F), bed 90–110 °C (194–230 °F), drying at 80 °C (176 °F) for 8 h. The outdoor guide's sun-facing material. The shower thread does not print ASA. The bed top is above the A1 maximum of 100 °C (212 °F). | ||||||
| 4 | Bambu Lab · PLA Basic | PLA | 190–230 °C (374–446 °F) | 35–45 °C (95–113 °F) | Datasheet | |
PLA Basic lists 190–230 °C (374–446 °F), a bed of 35–45 °C (95–113 °F), and drying at 50 °C (122 °F) for 8 h. The shower replies name PLA and Polyterra PLA. Polyterra is not a catalog id. This row is a PLA sheet, not a claim that those soap dishes used PLA Basic. | ||||||
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The only shower question in this bank is a PLA soap dish. The replies that report a result say the PLA parts are still in service. PETG and ASA are here as catalog alternatives with higher listed temperatures.
What the shower replies report
r/BambuLab 1bb49vl asks how PLA will hold up as a soap dish. A score-60 reply has a PLA hair screen in a tub for about a year and a half. A score-31 reply still uses a soap dish printed around 2016. A score-20 reply has Polyterra white trays and says to clean them, because mold or soap residue is the likelier failure. A score-10 reply says Polyterra PLA has survived more than a year of very hot showers without melting. Polyterra is not a catalog id. PLA Basic lists 190–230 °C (374–446 °F) and a bed of 35–45 °C (95–113 °F). That row is a PLA sheet, not the soap-dish spool.
Watertight printing is waterproof filament. Sun and heat outdoors are outdoor filament. PETG process is good PETG prints.
PETG and ASA temperatures
PolyLite PETG lists 220–250 °C (428–482 °F) and a bed of 70–90 °C (158–194 °F), with drying at 65 °C (149 °F) for 6 h. SUNLU PETG lists 240–260 °C (464–500 °F) and a bed of 60–70 °C (140–158 °F), with drying at 60–65 °C (140–149 °F) for 6–8 h. Bambu ASA lists 235–260 °C (455–500 °F) and a bed of 90–110 °C (194–230 °F), with drying at 80 °C (176 °F) for 8 h. None of those sheets states a shower life. PETG, ASA, and PLA are the material pages.
The other four threads
r/FixMyPrint ugv0ur is how to store opened spools. Replies name zip bags, cereal containers, and tubs of desiccant.
r/FixMyPrint una950 asks if a repeating gap is humid filament. The score-33 reply says the extruder gear is wobbling. The top comment is a joke about the model's shape.
r/BambuLab 1vcujin is a SUNLU AMS heater. The poster's hygrometer went from 10% to 31% relative humidity, and Bambu Studio showed D. Replies say the drying vent was closed, so the moisture stayed in the box. Those percentages are that meter.
r/FixMyPrint xbs0hy asks if a print that fails after 6 hours in a dryer is humidity. The score-42 reply says heat creep. The poster later took the printer out of a tent and says it recovered. Polymaker and SUNLU are the brand indexes.
Pros and cons
Pros
- The PLA lifespan lines stay attached to the shower replies that stated them.
- PETG and ASA bring listed nozzle and bed ranges for someone who wants a higher catalog heat rating than PLA.
Cons
- No datasheet in this set states a bathroom lifespan or a waterproof grade.
- Four of the five threads are storage, an extruder wobble, a dryer vent, and heat creep. They are not shower tests.
Printer considerations
- Clean the part. The score-20 reply on r/BambuLab 1bb49vl says a Polyterra tray is more likely to grow mold or hold soap scum than to melt, and says to clean it. Mold resistance is not a number on these datasheets.
- A closed bathroom is humid air around the spool as well as water on the part. r/FixMyPrint ugv0ur is storage, and the replies name zip bags, cereal boxes, and tubs of desiccant.
- r/BambuLab 1vcujin is a SUNLU AMS heater whose hygrometer went from 10% to 31% relative humidity, which Bambu Studio graded D. The replies say the vent was closed, so the moisture had nowhere to go. Those percentages are the post's meter.
What the community says
r/BambuLab 1bb49vl asks how PLA will hold up as a soap dish in a child's shower. A score-60 reply has a PLA hair screen in a tub drain for about a year and a half and says it is fine. A score-31 reply has used a soap dish printed around 2016 and says it is still in the bathroom. A score-20 reply has Polyterra white trays, says they have not melted, and says to clean them because mold or soap residue is the likelier problem. A score-10 reply printed the same dish in Polyterra PLA and says more than a year of very hot showers has not melted it. r/FixMyPrint ugv0ur asks for cheap storage for opened spools. Replies name zip bags, a filament dryer, cereal containers, and airtight tubs with desiccant. r/FixMyPrint una950 asks if a repeating under-extrusion pattern is humid filament. The top comment is a joke about the shape. The score-33 reply says the extruder gear is off center or wobbling. r/BambuLab 1vcujin installed a SUNLU AMS heater and watched a hygrometer rise from 10% to 31% relative humidity, graded D in Bambu Studio. Replies say to open the vent so wet air can leave. r/FixMyPrint xbs0hy asks if a print that goes bad after 6 hours in a dryer is humidity. The score-42 reply says it is heat creep. The poster later moved the printer out of a tent and says the print recovered.
- Community source, r/BambuLab 1bb49vl
- Community source, r/FixMyPrint ugv0ur
- Community source, r/FixMyPrint una950
- Community source, r/BambuLab 1vcujin
- Community source, r/FixMyPrint xbs0hy
Sources & notes
Accessed 20 October 2026.
- PolyLite PETG technical data sheet datasheet
- Bambu ASA technical data sheet datasheet
- Bambu PLA Basic technical data sheet datasheet
- SUNLU PETG product page manufacturer
- SUNLU filament wiki manufacturer
- Community source, r/BambuLab 1bb49vl reddit
- Community source, r/FixMyPrint ugv0ur reddit
- Community source, r/FixMyPrint una950 reddit
- Community source, r/BambuLab 1vcujin reddit
- Community source, r/FixMyPrint xbs0hy reddit
Related questions
- How do I get good PETG prints?PETG
- What is the best filament for outdoor use?Outdoor
- What filament is waterproof?Watertight
Questions
Do the shower replies say PLA failed?
They say the opposite. A PLA drain screen is reported fine after about a year and a half, a soap dish from about 2016 is still in use, and two replies say Polyterra PLA trays have not melted. Polyterra is not in this catalog. None of those replies is a waterproof rating.
Why rank PETG and ASA as well?
They are the catalog materials with higher listed nozzle and bed temperatures than PLA Basic. PolyLite PETG lists 220–250 °C (428–482 °F) and 70–90 °C (158–194 °F). SUNLU PETG lists 240–260 °C (464–500 °F) and 60–70 °C (140–158 °F). Bambu ASA lists 235–260 °C (455–500 °F) and 90–110 °C (194–230 °F). The shower thread does not test those spools.