3D Printing Filament Guide: PLA vs PETG vs ABS vs TPU — Which Should You Use?

Choosing the Right Filament Matters

Your 3D printer is only as good as the material you put in it. Choose the wrong filament and you’ll spend hours troubleshooting failed prints, warping, and poor surface finish.

We tested the four most popular filament types — PLA, PETG, ABS, and TPU — across a variety of use cases. This guide will help you pick the right one for every project.

Quick Comparison

Property	PLA	PETG	ABS	TPU
Difficulty	Easy	Easy	Hard	Medium
Strength	Medium	High	High	Flexible
Heat Resistance	Low (60°C)	Medium (80°C)	High (100°C)	Low (60°C)
UV Resistance	Poor	Good	Good	Poor
Food Safe	Some brands	No	No	No
Toxic Fumes	Minimal	Low	High	Low
Required Temp	190-220°C	220-250°C	230-260°C	210-240°C
Bed Temp	20-60°C	50-80°C	90-110°C	40-60°C
Enclosure Needed	No	No	Yes	No
Price (1kg)	$15-25	$18-30	$15-25	$25-40
Best For	Models, decor	Functional parts	Mechanical parts	Flexible items

PLA — The Everyday Champion

PLA (Polylactic Acid) is the most popular 3D printing filament, and for good reason. It’s easy to print, produces excellent surface finish, and comes in more colors and variants than any other material.

Pros

• Easiest filament to print — works on any FDM printer
• No enclosure or heated bed required
• Wide range of colors, including matte, silk, wood-fill, and marble
• Minimal warping and excellent layer adhesion
• Biodegradable (plant-based)
• Good detail reproduction

Cons

• Low heat resistance (deforms at 60°C)
• Brittle — not suitable for functional mechanical parts
• Poor UV resistance — outdoor use causes yellowing and brittleness
• Low impact resistance

Best PLA Variants

Variant	Price	Best For	Notes
PLA Basic	$15/kg	Everyday printing	Most reliable
PLA Matte	$20/kg	Display models	No shiny artifacts
PLA Silk	$25/kg	Decorative items	Metallic sheen
PLA-CF	$30/kg	Functional parts	40% stronger, abrasive
Wood PLA	$25/kg	Artistic prints	Actual wood particles

Our Recommended PLA Brands

Brand	Rating	Best Feature
Bambu PLA Basic	⭐⭐⭐⭐⭐	Most consistent, zero failures
Polymaker PolyLite	⭐⭐⭐⭐⭐	Wide variety, reliable
Creality Hyper PLA	⭐⭐⭐⭐	Best budget option
Sunlu PLA+	⭐⭐⭐⭐	Good strength for PLA

PETG — The Functional All-Rounder

PETG (Polyethylene Terephthalate Glycol) combines the ease of PLA with much better mechanical properties. It’s our go-to recommendation for functional parts.

Pros

• Stronger and more flexible than PLA
• Better heat resistance (80°C vs 60°C)
• Good chemical resistance
• Slightly flexible — won’t shatter like PLA
• Good layer adhesion
• FDA-approved food safe grades available

Cons

• More stringing than PLA
• Slightly harder to dial in settings
• Glossy finish shows layer lines more than matte PLA
• Can be tricky to sand and paint

When to Use PETG Instead of PLA

Situation	PLA	PETG	Why
Display model on shelf	✅	—	PLA has better finish
Outdoor part	—	✅	PETG resists UV better
Gear or mechanical part	—	✅	PETG is stronger
Food-contact container	—	✅	PETG food-safe grades
Phone case	—	✅	PETG absorbs impact
First-time user	✅	—	PLA is more forgiving

ABS — The Engineering Choice

ABS (Acrylonitrile Butadiene Styrene) is the same material used in LEGO bricks. It offers excellent heat resistance and impact strength, but requires more skill to print successfully.

Pros

• High heat resistance (100°C)
• Excellent impact strength
• Lightweight yet durable
• Easy to post-process (acetone smoothing)
• Wide availability

Cons

• Requires heated enclosure to prevent warping
• Produces toxic fumes (need ventilation)
• Strong odor during printing
• Prone to warping and cracking
• Not food safe

ABS Printing Requirements

Requirement	Minimum	Recommended
Nozzle Temp	230°C	250°C
Bed Temp	90°C	110°C
Enclosure	Partial	Full, heated to 40°C+
Cooling Fan	Off or 10%	Off
Ventilation	Open window	Active fume extraction

Important: Only print ABS in a well-ventilated area or with an activated carbon filter. The fumes contain styrene, which is a potential carcinogen.

TPU — The Flexible Solution

TPU (Thermoplastic Polyurethane) is a flexible, rubber-like material perfect for phone cases, gaskets, wearables, and any part that needs to bend.

Pros

• Extremely flexible (Shore 85A-98A hardness)
• Excellent impact and abrasion resistance
• Good chemical resistance
• Durable and long-lasting
• Grippy surface texture

Cons

• Slow print speeds (30-60mm/s max)
• Requires direct-drive extruder
• Stringing can be severe
• Hard to remove from build plate
• Limited color options

TPU Hardness Guide

Shore Hardness	Feel	Best For
85A	Very soft, rubbery	Squishy toys, grips
90A	Soft, flexible	Phone cases, gaskets
95A	Medium flex	Wearables, bumpers
98A	Firm but bendable	Tires, belts

Filament Cost Comparison (Per 1kg Spool)

Material	Budget	Mid-Range	Premium
PLA	$12 (Sunlu)	$20 (Polymaker)	$30 (Bambu)
PETG	$15 (Sunlu)	$22 (Polymaker)	$35 (Bambu)
ABS	$12 (Sunlu)	$20 (Polymaker)	$30 (Bambu)
TPU	$20 (Overture)	$30 (Polymaker)	$45 ( NinjaTek)

Storage Tips

All filaments are hygroscopic (absorb moisture). Store them properly:

1. Seal in a bag with desiccant packets when not in use
2. Use a dry box for long-term storage (especially PETG, ABS, TPU)
3. Dry before printing if filament has been exposed — 4-6 hours at 50°C for PLA, 6-8 hours at 65°C for PETG/ABS/TPU
4. Never print wet filament — it causes bubbling, stringing, and weak prints

Our Verdict

• 90% of your prints should be PLA — it’s easy, reliable, and looks great
• Switch to PETG for anything functional or mechanical
• Use ABS only if you need high heat resistance AND have an enclosed printer
• TPU is specialty — buy only when you specifically need flexible parts

Don’t overthink it. Start with PLA, master your printer, then expand to other materials as needed.