{
  "question": "What filament should I use outdoors?",
  "slug": "outdoors",
  "useCase": "outdoor",
  "useCaseLabel": "Outdoor",
  "updated": "2026-10-14",
  "shortAnswer": "For a part that stays outdoors, use ASA. Prusa describes ASA as the outdoor technical material because of UV and temperature resistance, and PETG is the fallback when the printer is not enclosed.",
  "recommendedMaterials": [
    "asa",
    "petg"
  ],
  "printerConsiderations": [
    "Prusa says the ASA bed should be at least 100 °C and the printer should be enclosed, or use a draft shield, in a ventilated room.",
    "ASA releases fumes. Do not treat an unlisted enclosure on a printer page as proof the machine is safe to run closed up.",
    "Match the nozzle range in the table to the printer’s maximum nozzle temperature. A printer that stops at 250 °C may not reach the top of the Prusament ASA range."
  ],
  "pros": [
    "ASA is more UV resistant than ABS, warps less than ABS, and is the material Prusa points at outdoor parts.",
    "Polymaker’s ASA datasheet describes the material as an ABS alternative chosen for weather resistance."
  ],
  "cons": [
    "ASA still warps if the air around the part is cold, and the fumes are a real constraint on where you print it.",
    "PLA is the wrong outdoor default. Prusa says it degrades under UV and softens above about 60 °C."
  ],
  "community": "Threads about a part that lives outside, including sun-exposed automotive clips, settle on ASA and treat PETG as the spool people print when they do not have ventilation or an enclosure. Commenters who left PETG in direct sun report fading and, in a hot vehicle, warping. ABS comes up only if the part will be painted.",
  "related": [
    "outdoor",
    "car-interior",
    "heat",
    "open-printer"
  ],
  "faq": [
    {
      "q": "Will PETG survive outside?",
      "a": "It can, for a while, and it is the practical print on an open machine. The outdoor threads and Prusa’s ASA article are why it is ranked behind ASA rather than instead of it."
    },
    {
      "q": "Where do the temperatures in the table come from?",
      "a": "From each filament record in this catalog. They are not copied out of the Prusa material table, and a blank cell stays blank."
    }
  ],
  "sources": [
    {
      "title": "ASA, Prusa Knowledge Base",
      "url": "https://help.prusa3d.com/article/asa_1809",
      "kind": "manufacturer"
    },
    {
      "title": "Prusa filament material guide",
      "url": "https://help.prusa3d.com/filament-material-guide",
      "kind": "manufacturer"
    },
    {
      "title": "Polymaker ASA technical data sheet",
      "url": "https://polymaker.com/wp-content/uploads/lana-downloads/TDS_Polymaker_ASA-V6.0_2025-12-02_EN.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": "Best filaments for extended outdoor use?, r/3Dprinting",
      "url": "https://www.reddit.com/r/3Dprinting/comments/y0pceo/best_filaments_for_extended_outdoor_use/",
      "kind": "reddit"
    },
    {
      "title": "Which filament for an outdoor automotive part?, r/3Dprinting",
      "url": "https://www.reddit.com/r/3Dprinting/comments/vsc1ac/which_filament_for_an_outdoor_automotive_part/",
      "kind": "reddit"
    }
  ],
  "recommendations": [
    {
      "rank": 1,
      "note": "ASA with a listed nozzle and bed range and a Bambu datasheet. First choice when the printer can hold those temperatures.",
      "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
    },
    {
      "rank": 2,
      "note": "The ASA Prusa’s outdoor guidance is written around. This record lists a hotter nozzle range than Bambu ASA.",
      "brand": "Prusament",
      "product": "ASA",
      "material": "ASA",
      "url": "/brand/prusament/asa",
      "nozzle": "250–270 °C",
      "bed": "100–120 °C",
      "pricePerKg": null,
      "datasheetUrl": null,
      "affiliateUrl": null
    },
    {
      "rank": 3,
      "note": "Polymaker’s ASA datasheet is the weather-resistance source. Ranked with the other ASA spools, not above them.",
      "brand": "Polymaker",
      "product": "Polylite ASA",
      "material": "ASA",
      "url": "/brand/polymaker/polylite-asa",
      "nozzle": "235–260 °C",
      "bed": "90–110 °C",
      "pricePerKg": null,
      "datasheetUrl": "https://cdn.shopify.com/s/files/1/0548/7299/7945/files/PolyLite_ASA_TDS_EN_V5.4.pdf",
      "affiliateUrl": null
    },
    {
      "rank": 4,
      "note": "Easier print for an open printer. It is not the UV-resistant choice; use it when ASA’s enclosure and bed temperature are out of reach.",
      "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
    }
  ]
}