High Temperature PLA Filament

What Is High Temperature PLA?

High temperature PLA is an advanced PLA-based filament formulated to provide improved heat stability compared with regular PLA. It is designed for makers and engineers who want the familiar printability, low warping, and accessible workflow of PLA but need parts that can better withstand heat in real-world use.

Standard PLA can begin to soften in moderately warm environments, which limits its suitability for parts left in hot cars, near electronics, close to machinery, or exposed to direct summer sunlight. Polymaker HT-PLA materials are built to extend PLA's useful temperature range while retaining a straightforward printing experience.

The High Temperature PLA collection includes three material options. Choose HT-PLA for premium satin-finish parts with high heat stability, HT-PLA Pro for easy-printing parts that keep their shape in warm environments without load, and HT-PLA-GF for high-temperature functional parts that require stronger heat deflection performance after annealing.

Why Choose High Temperature PLA?

PLA-like printability: High Temperature PLA is designed to print easily on a wide range of FDM printers. It offers a more accessible route to heat-resistant functional parts than many engineering materials that require high nozzle temperatures, a heated chamber, or complex enclosure management.

Better shape retention in heat: Polymaker HT-PLA and HT-PLA Pro are engineered to retain their shape in warm environments without load. This makes them useful for heat-exposed display pieces, models, housings, props, and utility parts.

Heat resistance after annealing: Annealing can improve the thermal performance of high-temperature PLA. For applications that need heat resistance under load, annealing is an important part of the post-processing workflow. HT-PLA-GF is specifically designed to gain significant heat deflection performance through annealing.

Professional surface quality: HT-PLA is available in a premium satin finish, making it suitable for parts that need a refined appearance as well as improved thermal stability.

A practical material bridge: High Temperature PLA fills the space between standard PLA and more demanding engineering materials. It is a strong choice when regular PLA is not heat-resistant enough, but printing ASA or other engineering materials would add unnecessary complexity.

Choose the Right High Temperature PLA

Polymaker™ HT-PLA

Polymaker™ HT-PLA is a next-generation PLA designed for excellent heat stability and a premium satin finish. It is an ideal choice for cosplay pieces, models, utility parts, tools, display items, and functional prints that may be exposed to warm conditions. HT-PLA prints at 210–230°C and can be annealed for 30 minutes at 80–100°C when additional heat stability is needed.

Choose HT-PLA when you want an easy-to-print, attractive PLA material that offers better heat resistance than standard PLA for parts not subject to significant load at elevated temperatures.

Polymaker™ HT-PLA Pro

Polymaker™ HT-PLA Pro is designed to print as easily as standard PLA while retaining its shape in heat-exposed environments without load. Its high softening temperature makes it a practical option for sunlit windowsills, warm workshop environments, display components, and parts positioned near heat-emitting equipment.

For applications requiring heat resistance under load, annealing is recommended. A 30-minute anneal at 100°C increases HT-PLA Pro's heat deflection performance, making it more suitable for functional parts that need to maintain shape under heat and moderate stress.

Choose HT-PLA Pro for easy-printing, visually clean parts that need stronger heat stability than standard PLA, particularly where shape retention without load is the main requirement.

Polymaker™ HT-PLA-GF

Polymaker™ HT-PLA-GF is a glass fiber-reinforced high temperature PLA designed for applications requiring thermal stability and functional performance. It maintains PLA's ease of printing while adding glass fiber reinforcement for increased stiffness and strong post-annealing heat performance.

HT-PLA-GF is the best choice in this collection for parts that need heat resistance under load. After annealing, it can deliver ABS-like heat resistance and is designed for applications that may face mechanical stress and temperatures up to 130°C. Typical uses include automotive interior components, heat-resistant electronics housings, technical brackets, industrial jigs, fixtures, and covers near heat sources.

Because glass fiber is abrasive, use a hardened steel, tungsten carbide, ruby-tipped, or another abrasion-resistant nozzle for HT-PLA-GF. Follow the material-specific product guidance for nozzle diameter, annealing, and print settings.

High Temperature PLA Printing and Annealing

Polymaker HT-PLA prints at 210–230°C, with a typical bed temperature range of 25–60°C. It is designed to work with the accessible printing workflow most users expect from PLA, without requiring the high bed temperatures or enclosed chamber commonly associated with materials such as ASA.

Annealing is a post-processing step that improves heat performance by allowing the material to crystallize. It is most useful when a part will experience elevated temperatures, particularly under load. For HT-PLA and HT-PLA Pro, anneal at 80–100°C for 30 minutes when higher thermal stability is required. Polymaker recommends 100°C as the standard starting point for HT-PLA.

HT-PLA-GF benefits most from annealing when heat deflection resistance is the priority. Test an annealing workflow with representative parts before final production, as geometry, wall thickness, infill, print orientation, and thermal exposure can affect dimensional change and end-use performance.

For the best results:

• Start with the recommended print profile for your printer
• Use the product-page and technical-data-sheet settings for the specific grade
• Print a small test part before committing to a critical production piece
• Anneal representative parts when heat resistance under load is required
• Allow annealed parts to cool gradually before handling
• Use a hardened nozzle for HT-PLA-GF
• Verify fit and dimensions after annealing for precision assemblies

High Temperature PLA Applications

High Temperature PLA filament is well suited to parts that need PLA-like printing with stronger performance in warm environments:

• Automotive interior accessories, mounts, and organizers
• Heat-resistant electronics housings and enclosures
• Functional prototypes and low-volume end-use parts
• Workshop tools, drill holders, brackets, and utility fixtures
• Industrial jigs, fixtures, gauges, and guides
• Cosplay props and costume components exposed to sunlight or warm events
• Sunlit windowsill displays and warm-environment household parts
• Covers, guards, and mounts positioned near heat-emitting equipment

Choose HT-PLA or HT-PLA Pro for parts that need elevated-temperature shape retention without significant load. Choose HT-PLA-GF when you need higher stiffness and stronger heat deflection performance after annealing.

High Temperature PLA vs Regular PLA, PETG, and ASA

High Temperature PLA vs Regular PLA

Regular PLA is one of the easiest materials to print, but it can soften in moderately warm conditions and is not the best choice for heat-exposed functional parts. High Temperature PLA is designed to preserve PLA's accessible printing workflow while offering substantially stronger thermal stability.

Choose regular PLA for decorative models, standard prototypes, and everyday prints that will remain at room temperature. Choose HT-PLA, HT-PLA Pro, or HT-PLA-GF for parts that may be exposed to direct sunlight, warm cars, nearby machinery, warm electronics, or other elevated-temperature conditions.

High Temperature PLA vs PETG

PETG is a strong general-purpose material with better heat resistance and toughness than standard PLA. It is a practical choice for durable functional parts, brackets, enclosures, and many outdoor applications. High Temperature PLA is the stronger option when the primary challenge is higher-temperature shape retention and you want a PLA-like printing experience.

Choose PETG when you need a broadly durable, impact-resistant material with accessible printability. Choose High Temperature PLA when heat stability is the central requirement, especially for parts designed to retain their shape in warm environments or, with HT-PLA-GF and annealing, maintain performance under heat and load.

High Temperature PLA vs ASA

ASA is an engineering-grade material known for UV resistance, weather resistance, and higher heat performance. It is a strong choice for outdoor parts, automotive exterior components, weather-exposed enclosures, and applications requiring long-term sunlight resistance. ASA generally needs a more controlled printer setup, often including an enclosure, to manage warping and improve layer adhesion.

High Temperature PLA is an easier-printing alternative for heat-exposed parts that do not require ASA's outdoor weatherability and UV resistance. Choose ASA for long-term outdoor use and demanding weather exposure. Choose High Temperature PLA for accessible, heat-resistant indoor parts, prototypes, tools, fixtures, cosplay pieces, and applications where ease of printing is a high priority.

Material Selection Guide