This guide walks through how to glue PLA, PETG, and ABS, the three most common filaments in the 3D printing world, using easy-to-find adhesives and proven techniques that deliver strong, lasting bonds. We’ll also highlight the best filament for beginners and where to buy 3D printing filament in Nigeria.
Gluing 3D printed parts can be tricky if you don’t know which adhesive works best for your material. Whether you’re assembling a multi-part model, fixing a broken print, or crafting something too large to print in one go, knowing how to bond your prints securely is essential.
Why You Might Need to Glue 3D Prints
Gluing is helpful when:
- Your model is too big to print as one piece
- A part breaks and needs repair
- You want to combine colors or materials
- You’re assembling a prototype or product in sections
Best Glues for PLA, PETG & ABS
PLA (Polylactic Acid)
Best glue options for PLA:
- Super Glue (Cyanoacrylate): Fast-drying and strong. Ideal for most PLA prints.
- Epoxy Resin: Good for large parts or when you want extra durability. Takes longer to cure.
- Hot Glue: Works in a pinch but not the strongest. Avoid for high-stress parts.
Tips:
- Lightly sand the surfaces before gluing for better adhesion.
- Apply clamps or pressure while drying.
- Avoid using acetone — it doesn’t work on PLA.
PETG (Polyethylene Terephthalate Glycol)
PETG is harder to glue because it resists most adhesives.
Best glue options for PETG:
- Epoxy Resin: Provides a strong mechanical bond, especially when surfaces are sanded.
- Polyurethane Glue (like Gorilla Glue): Works well but expands slightly as it cures.
- Plastic Weld (solvent-based): Melts surfaces to fuse parts chemically, but results vary.
Tips:
- PETG doesn’t respond well to super glue. Use clamps and give epoxy time to cure.
ABS (Acrylonitrile Butadiene Styrene)
ABS is popular for engineering prints and can be chemically welded.
Best glue options for ABS:
- Acetone Welding: Acetone softens ABS surfaces so they melt into one another. Creates a very strong bond.
- ABS Slurry: A mixture of ABS filament and acetone, used like a glue paste.
- Super Glue: Works but isn’t as strong as acetone welding.
Tips:
- Use acetone in a well-ventilated area. Wear gloves and a mask for safety.
Step-by-Step: How to Glue 3D Prints Like a Pro
- Clean the Parts: Remove dust, oil, or debris.
- Sand the Surfaces (Optional): Improves bonding.
- Apply Glue: Follow product instructions. Don’t use too much.
- Join the Pieces: Press firmly and align carefully.
- Hold or Clamp: Secure the parts while the glue cures.
- Let It Cure: Check the glue’s full drying time (can range from 5 minutes to 24 hours).
Pro Tips for Stronger Bonds
- For extra strength, design parts with alignment pins or slots.
- Test on a scrap piece of the same material before applying to your real print.
- Store your glues in a cool, dry place to extend shelf life.
See more: How to Paint PLA Filament: A Beginner’s Guide
Gluing 3D prints can be easy and effective when you match the right adhesive with the right material. Whether you’re working with PLA, PETG, or ABS, follow the tips above and you’ll get strong, clean results every time.
Frequently Asked Questions (FAQs)
Can you glue PLA 3D prints?
Yes. PLA can be glued effectively using cyanoacrylate (super glue), epoxy resin, or PLA-compatible adhesives. For stronger bonds, roughen the surfaces before gluing.
Should I sand 3D prints before gluing?
Yes, lightly sanding the surfaces where two parts meet improves adhesion by increasing surface area and removing print residue or oils.
What is the best 3D filament for beginners to glue?
PLA is generally the easiest to glue for beginners due to its compatibility with a wide range of adhesives and its forgiving nature during post-processing.
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