{
  "question": "What filament is waterproof?",
  "slug": "waterproof",
  "useCase": "watertight",
  "useCaseLabel": "Watertight",
  "updated": "2026-10-14",
  "shortAnswer": "Watertightness is mostly walls, flow, and temperature, not a magic polymer. PETG is the usual community pick, ASA is the other rigid option, and a critical part still needs an epoxy coat.",
  "recommendedMaterials": [
    "petg",
    "asa"
  ],
  "printerConsiderations": [
    "More walls and enough flow matter more than the brand. This catalog does not store wall count or flow, so those stay slicer settings.",
    "A single-wall vase will not hold water no matter which row you print.",
    "ASA’s bed and nozzle have to fit the printer. If they do not, stay with the PETG row instead of forcing ASA."
  ],
  "pros": [
    "The consensus puts the process ahead of the polymer, which matches how leaks actually happen.",
    "PETG rows have listed temperatures, so the ‘print hot enough’ part of the advice can be checked."
  ],
  "cons": [
    "Epoxy is the critical-use recommendation, and epoxy is not a filament in this database.",
    "No row is certified watertight. A datasheet link is not a pressure test."
  ],
  "community": "The consensus is that watertightness is mostly settings, meaning walls, flow, and temperature. PETG is the usual pick. ASA is also named. An epoxy coat is the recommendation for critical use.",
  "related": [
    "outdoor",
    "drying",
    "outdoors"
  ],
  "faq": [
    {
      "q": "Will thicker walls make PLA waterproof?",
      "a": "Walls and flow are the consensus, and PETG is the usual polymer. PLA is not the material this question names. Outdoor sun is a separate reason to avoid PLA, covered on the outdoor page."
    },
    {
      "q": "Is the epoxy a product you rank?",
      "a": "No. There is no epoxy filament record. The coat is a finishing step from the consensus, not a catalog row."
    }
  ],
  "sources": [
    {
      "title": "Prusament PETG technical data sheet",
      "url": "https://www.prusa3d.com/file/3464616/prusament-petg-technical-data-sheet.pdf",
      "kind": "datasheet"
    },
    {
      "title": "PolyLite PETG technical data sheet",
      "url": "https://cdn.shopify.com/s/files/1/0548/7299/7945/files/PolyLite_PETG_TDS_EN_V5.4.pdf",
      "kind": "datasheet"
    },
    {
      "title": "Bambu Lab ASA technical data sheet",
      "url": "https://cdn.shopify.com/s/files/1/0645/5876/0155/files/Bambu_ASA_Technical_Data_Sheet.pdf",
      "kind": "datasheet"
    },
    {
      "title": "Community source, r/3Dprinting 1nff6t6",
      "url": "https://www.reddit.com/r/3Dprinting/comments/1nff6t6/",
      "kind": "reddit"
    },
    {
      "title": "Community source, r/ender3 12273n7",
      "url": "https://www.reddit.com/r/ender3/comments/12273n7/",
      "kind": "reddit"
    },
    {
      "title": "Community source, r/3Dprinting zx9yin",
      "url": "https://www.reddit.com/r/3Dprinting/comments/zx9yin/",
      "kind": "reddit"
    },
    {
      "title": "Community source, r/FixMyPrint u150hn",
      "url": "https://www.reddit.com/r/FixMyPrint/comments/u150hn/",
      "kind": "reddit"
    },
    {
      "title": "Community source, r/3Dprinting 105qbp8",
      "url": "https://www.reddit.com/r/3Dprinting/comments/105qbp8/",
      "kind": "reddit"
    }
  ],
  "recommendations": [
    {
      "rank": 1,
      "note": "PETG with a listed nozzle of 240–260 °C and bed of 70–90 °C, plus a datasheet. The usual pick in this consensus.",
      "brand": "Prusament",
      "product": "PETG",
      "material": "PETG",
      "url": "/brand/prusament/petg",
      "nozzle": "240–260 °C",
      "bed": "70–90 °C",
      "pricePerKg": null,
      "datasheetUrl": "https://www.prusa3d.com/file/3464616/prusament-petg-technical-data-sheet.pdf",
      "affiliateUrl": null
    },
    {
      "rank": 2,
      "note": "PETG with a listed nozzle of 220–250 °C and bed of 70–90 °C, plus a datasheet.",
      "brand": "Polymaker",
      "product": "Polylite PETG",
      "material": "PETG",
      "url": "/brand/polymaker/polylite-petg",
      "nozzle": "220–250 °C",
      "bed": "70–90 °C",
      "pricePerKg": null,
      "datasheetUrl": "https://cdn.shopify.com/s/files/1/0548/7299/7945/files/PolyLite_PETG_TDS_EN_V5.4.pdf",
      "affiliateUrl": null
    },
    {
      "rank": 3,
      "note": "ASA, the other rigid option named. Listed nozzle 235–260 °C and bed 90–110 °C. Not a seal by itself.",
      "brand": "Bambu Lab",
      "product": "ASA",
      "material": "ASA",
      "url": "/brand/bambu-lab/asa",
      "nozzle": "235–260 °C",
      "bed": "90–110 °C",
      "pricePerKg": null,
      "datasheetUrl": "https://cdn.shopify.com/s/files/1/0645/5876/0155/files/Bambu_ASA_Technical_Data_Sheet.pdf",
      "affiliateUrl": null
    }
  ]
}