Sometimes 3D-printed parts need extra strength, whether you’re assembling large prints, fixing broken parts, or combining multi-material models. The right adhesive makes a huge difference! 🎯✨

Let’s explore the best glues for different 3D printing materials (PLA, ABS, PETG, TPU, and more!), plus pro tips for perfect bonding! 🔧🤖

🛠️ 1. Why Use Glue in 3D Printing?

🔹 Assembling multi-part models (large prints, robot frames).
🔹 Fixing broken prints (cracks, failed layers).
🔹 Joining different materials (PLA + TPU, PETG + ABS).
🔹 Post-processing for stronger final parts!

Different filaments need different types of glue – let’s break it down! 🎯🛠️

📌 2. Best Glues for PLA (Polylactic Acid) – The Most Common Filament! 🎨

PLA is tricky to glue because it’s non-porous and smooth, but these adhesives work well:

✅ Best Adhesives for PLA:

✔ Super Glue (Cyanoacrylate – CA Glue) – Best overall! 💎
✔ 3D Gloop! – Special PLA adhesive, melts parts together! 🔥
✔ Epoxy Resin – Strong & durable, but takes longer to cure! ⏳
✔ Hot Glue Gun – Fast & easy, but not the strongest! 🚀

🔥 Best Choice?

💡 Super Glue (CA glue) + Accelerator (Spray Activator) = Fast & Strong! ⚡

⚠️ What to Avoid?

❌ Solvent-based glues (PLA doesn’t dissolve like ABS).
❌ Standard wood glue (not strong enough for PLA).

🎯 Pro Tip: Sanding the surface before gluing helps PLA adhere better! 🏗️

📌 3. Best Glues for ABS (Acrylonitrile Butadiene Styrene) – Strong but Tricky! 💪

ABS is tough and can be chemically welded! 🛠️

✅ Best Adhesives for ABS:

✔ Acetone (ABS Slurry or Weld) – Melts ABS together, making a chemical bond! 🧪
✔ Super Glue (CA Glue) – Works well, but not as strong as acetone welding! 💎
✔ Epoxy Resin – Great for large ABS assemblies!

🔥 Best Choice?

💡 Acetone welding = ABS parts fuse together permanently! 🔥

🎯 Pro Tip: To make ABS Slurry, mix acetone + ABS scraps = perfect adhesive for ABS bonding! 🏗️

📌 4. Best Glues for PETG (Polyethylene Terephthalate Glycol) – Strong & Slippery! 🏎️

PETG is durable & flexible, but hard to glue because it resists adhesion!

✅ Best Adhesives for PETG:

✔ Super Glue (CA Glue + Activator) – The most effective! ⚡
✔ 3D Gloop! (PETG Formula) – Designed specifically for PETG bonding! 🏗️
✔ Hot Glue Gun – Works, but not very strong.

🔥 Best Choice?

💡 Super Glue + Activator = Fastest & Strongest PETG Bonding! 🚀

🎯 Pro Tip: PETG doesn’t like being sanded – Instead, use alcohol to clean surfaces before gluing! 🧼

📌 5. Best Glues for TPU (Flexible Filaments) – Hard to Bond! 🤸‍♂️

Since TPU is rubbery and flexible, most glues won’t hold well.

✅ Best Adhesives for TPU:

✔ Contact Cement – Stays flexible & strong! 🤲
✔ Flexible Super Glue (Rubberized CA Glue) – Bonds TPU without getting brittle! 🦾
✔ Shoe Goo / E6000 Glue – Super strong & remains flexible! 🏃‍♂️

🔥 Best Choice?

💡 Contact Cement is perfect for TPU because it remains stretchy! 🏆

🎯 Pro Tip: Sewing TPU together can be better than gluing for wearable applications! 👕

📌 6. Best Glues for Resin Prints (SLA/DLP 3D Printing) – Fragile but Precise! 🏗️

SLA resin prints are brittle and need a strong, clear adhesive!

✅ Best Adhesives for Resin Prints:

✔ UV Resin (Same as Print Material) – Cures under UV light = seamless bonds! ☀️
✔ Super Glue (CA Glue) – Strong, but leaves visible seams.
✔ Epoxy Resin – Best for larger parts, but slow to cure.

🔥 Best Choice?

💡 UV Resin + UV Light = Invisible, Super-Strong Bonding! 🎯

🎯 Pro Tip: Apply UV resin, then cure with a UV flashlight for instant strength! 🔦

📌 7. Specialty Adhesives for Multi-Material Bonding! 🏆

If you’re combining PLA + TPU, ABS + PETG, or metal-infused filaments, you need the right glue!

Best Multi-Material Adhesives:

✔ JB Weld (Epoxy for Plastic & Metal) – Bonds almost anything! 🔩
✔ E6000 (Flexible + Strong) – Great for mixed materials!
✔ Gorilla Glue (Expanding Polyurethane Glue) – Super strong, but messy! 🏗️

🎯 Pro Tip: For best results, rough up surfaces (sanding) before gluing! 🛠️

🔥 Quick Reference: Best Glue for Each Filament!

🚀 Final Thoughts: Choosing the Right Glue for 3D Printing!

🔹 For PLA: Super Glue + Activator = Fast & strong! ⚡
🔹 For ABS: Acetone welding = Chemical bond! 🔥
🔹 For PETG: Super Glue = Quick & reliable! 🏗️
🔹 For TPU: Contact Cement = Stays flexible! 🤸‍♂️
🔹 For SLA Resin: UV Resin = Perfect invisible joins! ☀️

With the right glue, your 3D prints will be stronger, more durable, and seamlessly assembled! 🏆✨