Best Glue for Every Plastic Type - A Technical Adhesive Selection Guide

The All-Purpose Glue Fallacy

If you have ever watched “all-purpose” glue peel off a broken plastic part like a sticker, you have seen surface energy in action. Plastics are not one material family, they are a whole lineup of polymers with different chemistry, and adhesives only work when they can wet and bite into that specific surface.

This page is strictly about adhesives, primers, and solvent cements, meaning chemical bonding methods you can do on the bench. If your part is PE, PP, or you need a true melt-fusion repair on a crack in a tank or bumper, jump to our heat-based option, the plastic welding guide for homeowners at /diy/plastic-welding-guide-for-homeowners.

Quick Answer: Best Glue by Plastic (60-second chart)

Use this chart when you need a fast call. If your plastic is PE, PP, or PTFE, assume you need a primer, an MMA plastic bonder, or a non-adhesive solution.

Plastic (common name)	Typical ID	Best adhesive choice	Use it for	Do not use it for
ABS	7 (sometimes)	Medium CA or 2-part epoxy	Tight breaks, tabs, housings	High peel or impact without reinforcement
PVC	3	PVC solvent cement (best)	PVC-to-PVC joints	PE/PP, wet/dirty pipe, pressurized joints without cure
CPVC	7 (often)	CPVC solvent cement + primer	Hot water supply line joints	Subbing PVC cement “because it fits”
Polycarbonate (PC)	7	2-part epoxy (or PC solvent cement if compatible)	Brackets, clear guards	Solvents on stressed clear PC (crazing risk)
Acrylic (PMMA)	7	Acrylic solvent cement (Weld-On type)	Clear acrylic cracks, display cases	CA on clear edges (frosting), acetone wiping
Polystyrene (PS)	6	PS model cement (solvent)	Rigid PS housings	Hot glue or strong solvents on foam PS
PET	1	2-part epoxy	Appliance parts, bottles (non-food)	Solvent cements (usually ineffective)
HDPE / LDPE	2 / 4	MMA plastic bonder or CA + polyolefin primer	Outdoor parts, bins, low-energy plastics	Standard epoxy or standard CA without primer
Polypropylene (PP)	5	MMA plastic bonder or CA + primer, flame treat helps	Automotive trim, containers	Standard CA or epoxy without treatment
PTFE (Teflon)	none / 7	Generally not practical at home	Mechanical retention only	Expecting “glue” to hold long term

Best glue for ABS: medium CA for close-fit, or a slow-cure 2-part epoxy for strength.
Best glue for PVC: PVC cement for PVC-to-PVC, CA only for small non-pressurized items.
Best glue for acrylic (PMMA): acrylic solvent cement (Weld-On category), not standard super glue.
Best glue for polyethylene (HDPE/LDPE): MMA plastic bonder first choice, CA + polyolefin primer second.
Best glue for polypropylene: MMA plastic bonder, or CA + primer, plus flame treatment when needed.
Best glue for PTFE: skip glue, plan on mechanical fastening or specialized industrial processes.

Glue vs Solvent Cement vs Plastic Welding: which to use

Adhesives bond by sticking to the surface, solvent cements fuse by dissolving and re-hardening the plastic, and plastic welding fuses by heat. Solvent cement is usually the strongest option for PVC, CPVC, ABS, PS, and acrylic when you are bonding the same plastic to itself with a tight joint.

Use plastic welding when the plastic is PE or PP and the part needs real strength, or when the joint is dirty, thick, or gap-prone. For heat tools, rod selection, and welding technique, use /diy/plastic-welding-guide-for-homeowners.

The Surface Energy Science (why some plastics “hate glue”)

Surface energy controls whether an adhesive wets out or beads up. High surface energy plastics such as polycarbonate, ABS, acrylic (PMMA), and PVC generally accept common adhesives if you prep them correctly.

Low surface energy plastics like PE and PP repel most adhesives, and PTFE is on another level of slippery. With low-energy plastics, your success depends on surface treatment (primer, flame, plasma) or using an adhesive chemistry built for polyolefins (usually MMA).

Identifying the Recycling Symbol (and what to do when there is no symbol)

The recycling triangle is your first checkpoint. Codes 1 through 7 tell you the resin family, and that determines your adhesive family.

Code 1 (PET or PETE) is common in beverage bottles and clear clamshells. Code 2 (HDPE) and code 4 (LDPE) are the waxy, flexible polyethylenes that fight glue, a challenge often encountered when gluing cracked refrigerator plastic bins.

Code 3 (PVC) is pipes, fittings, and many household profiles, and it responds well to the right solvent cement. Code 5 (PP) is food containers and many automotive trim parts, it usually needs primer or MMA.

Code 6 (PS) includes rigid polystyrene and foam, and foam will melt with the wrong solvent or hot glue temperature. Code 7 is the catch-all, it can be ABS, PC, acrylic, nylon, and blends, so treat it as “needs confirmation” rather than “glues easily.”

If there is no symbol, you have to identify by behavior and feel, not guesswork. Waxy feel and a slightly translucent look often points to PE or PP, brittle glossy snap often points to PS, and tough clear with stress whitening can be PC.

A float test can help but it is not definitive, and fillers change density, so do not rely on it alone. A hot pin test and sniff test can release nasty fumes and can ruin the part, so I do not recommend it for home repairs.

If you want a proper ID workflow, use our plastic identification master guide at /diy/plastic-identification.

Adhesive Compatibility Matrix (Recycling Codes 1–7 + common household items)

This matrix is the decision tool competitors usually miss. Use it to pick an adhesive family, then follow the family protocol later in the article.

Resin code	Plastic (common name)	Common household items	Recommended adhesive family	Required prep	Common failure mode
1	PET / PETE	soda bottles, clear clamshells	epoxy (slow cure) or specialty PET adhesive	clean, scuff 220 to 320	clean peel from poor wetting
2	HDPE	buckets, jugs, cutting boards	MMA plastic bonder, or CA + polyolefin primer	aggressive clean, flame treat optional	adhesive pops off in one sheet
3	PVC	pipes, fittings, window trim	PVC solvent cement (ASTM D2564)	clean, primer for pressure	leak from poor socket wetting
4	LDPE	squeeze bottles, bags, lids	MMA plastic bonder, or CA + primer	clean, flame treat optional	bond creeps under load
5	PP	food tubs, living hinges, trim	MMA plastic bonder, or CA + primer	clean, flame treat recommended	brittle CA joint snaps or peels
6	PS	brittle housings, disposable cutlery	PS solvent cement, or CA for small rigid breaks	light clean only	melted foam, solvent attack
7	Other (ABS, PC, PMMA, nylon, blends)	electronics shells, clear guards, tools	ABS: CA/epoxy, PC: epoxy, PMMA: solvent cement, nylon: specialty	confirm plastic, then prep	crazing, weak bond, stress crack

Surface Prep That Actually Matters (Clean, Roughen, Prime, Flame Treat)

Most plastic bond failures are prep failures. Your adhesive can be perfect on paper, but it cannot bond through skin oil, silicone residue, mold release, or a glossy oxidized skin.

Cleaning: 90%+ isopropyl alcohol is the safest baseline for most plastics, and it is my default wipe. Acetone is not a universal cleaner, it can haze acrylic and polycarbonate and can melt polystyrene, so test before you wipe.

Roughening: sand only when the adhesive family benefits from mechanical keying (epoxy, PU, many MMAs). Use 180 to 220 grit for structural bonds, then remove dust, because 400 grit polished plastic can lower epoxy bite.

Priming: polyolefin primer for PE and PP is not optional if you are using CA or standard epoxies. Apply the primer thin, let it flash per label, then bond without touching the surface.

Flame treatment: this is a surface-energy bump for PE and PP, not “melting the plastic.” Done right, it turns water beading into a water sheet, which is the quick water-break test that tells you it worked.

Step-by-step application protocols by adhesive family

These are shop-style protocols, meant to be repeatable. Follow the one that matches your adhesive family, and do not mix techniques blindly.

Cyanoacrylate (CA) protocol, thin vs gel, activators, and bloom control

Use thin CA when the parts fit tight and you want capillary action to wick into a crack. Use medium CA for most plastic tabs and breaks, and gel CA when you need a small gap fill and more placement time.

Prep the joint with IPA wipe, then scuff only if the plastic is glossy and the joint is not tight-fitting. Ideal CA bondlines are very thin, if you have a wide gap the joint will be brittle and will fail in peel.

If you use activator, spray it lightly on one side only, then apply CA to the other side and assemble. Heavy activator can make the joint cure too fast and go chalky-brittle.

To avoid frosting or blooming on clear plastics, reduce excess glue, increase airflow, and avoid sealing the part in a closed box while it cures. If you need a clear repair on acrylic or PC, step away from CA and use a solvent cement (PMMA) or a clear epoxy designed for optics.

Where CA fails: peel loads, impact, and flexing joints, and most PP or PE joints without primer. If you see clean peel-off, switch to MMA bonder or add a polyolefin primer system.

Epoxy protocol (rigid strength, best gap filler)

Choose epoxy when you need gap filling, chemical resistance, and strength on rigid plastics like ABS, PVC, PC (with caution), PET, and many glass-filled housings. Use slow-cure epoxy when you can, because 5-minute formulas are convenient but usually lower strength and higher brittleness.

Sand 180 to 220 grit where possible, then wipe with IPA and let it dry. Mix by volume accurately, scrape the cup walls, then apply a thin wetting coat to both surfaces before you add more to fill.

Clamp with firm contact but do not squeeze all epoxy out of the joint. If the part is thin and you overtighten, you create a starved bondline and it pops under shear.

Epoxy on PE or PP: expect failure unless you use a primer, flame treatment, or a purpose-built polyolefin epoxy system. In most home repairs, MMA is a better structural pick for PE and PP.

Polyurethane (PU) protocol (flexible, vibration tolerant)

Choose PU when the plastic or assembly needs flex, vibration resistance, or a semi-elastic bondline. PU can work well on ABS, PVC, and many mixed-material joints, but it is not the first choice for PE, PP, or PTFE without primer systems.

Scuff 120 to 180 grit, clean with IPA, then apply a thin coat and assemble. PU needs moisture to cure, so very dry shops can slow cure, and tight joints without air exposure can stay tacky longer.

Clamp lightly and allow for expansion if the PU foams. If you need clean cosmetics, pick a non-foaming PU or a flexible epoxy.

Solvent cement protocol (PVC, CPVC, ABS, PS, acrylic)

Solvent cement is not “glue,” it is solvent welding, meaning you are softening and fusing the plastic. Joint fit matters, if you have big gaps or warped pieces, fix fit or choose a gap-filling adhesive.

Dry fit first, then clean, then apply cement to both surfaces where the label calls for it. Assemble while the surfaces are wet, seat fully, and hold pressure until it grabs, because push-out is common on pipe sockets.

Ventilation is not optional. THF, MEK, methylene chloride, and acetone blends are aggressive solvents, use cross-ventilation and keep ignition sources away.

Crazing warning: stressed clear acrylic and polycarbonate can craze with the wrong solvent. Test on scrap or a hidden edge, and if you see micro-cracks, stop and switch to an epoxy or a compatible cement.

MMA (methacrylate) plastic bonder protocol (best structural option for PE and PP)

MMA plastic bonders are what I reach for when standard adhesives fail, especially on PP and PE. They are two-part systems (often dual-syringe or dual-cartridge) and they cure to a tough, slightly flexible structural bond.

Clean aggressively, then scuff 80 to 120 grit for bite, then clean again. Dispense and mix properly, apply to one side, assemble, and clamp with steady contact, because MMA likes a controlled bondline rather than squeeze-out.

MMA has a strong odor and can be sensitizing, so gloves and ventilation matter. Do not use it on parts where the solvent component will attack a foam core or a stress-loaded clear plastic without a test.

Gluing “un-glueable” polypropylene (PP): primer, flame treat, reinforcement ladder

Polypropylene is the classic frustration plastic. If you want PP to hold, you need to raise surface energy or use chemistry that does not care about low-energy surfaces.

Home-safe flame treatment mini-protocol: use a clean propane torch, set to a stable blue flame, and keep the tip 2 to 3 inches off the surface. Make one fast pass at roughly 8 to 12 inches per second, you are not heating the part, you are oxidizing the skin.

Do the water-break test immediately, mist or wipe water across the area. If it sheets instead of beads, bond within 30 minutes for best results, because the effect decays.

Recommendation ladder for PP: use an MMA plastic bonder first for structural repairs, use CA plus a polyolefin primer second for small rigid breaks, and add mechanical reinforcement (staples, screws, backing plates) when the joint sees peel or flex; this differs from ABS workflows, where choices like the best glue for ABS plastic repairs are often sufficient without primers. If a PP part is safety-critical, skip glue and design a mechanical fix.

Plastic-to-Other Materials (Metal, Rubber/Silicone, Glass, Wood)

Mixed-material bonds fail because the materials expand differently and because many non-plastics carry oils or release agents. When you bond plastic to metal, you usually want a slightly tougher adhesive that tolerates shear and thermal cycling.

For plastic-to-metal: epoxy or MMA is usually the best call, with a scuffed metal surface (80 to 120 grit) and a degrease wipe. For plastic-to-wood: epoxy or PU works, but seal porous wood first if you need maximum strength.

For plastic-to-glass: epoxy is typically the practical option, and you need a true glass clean (IPA, then a final lint-free wipe). Silicone rubber is a different animal, most adhesives will not bond cured silicone reliably, so plan on mechanical retention or a silicone-specific RTV system.

If the part will see peel, leverage, or cyclic flex, mechanical fasteners, rivets, or a backing strap often beat glue; in many cases this comes down to understanding plastic welding vs glue for thermoplastics, as explained in this guide on plastic welding vs glue for thermoplastics. I would rather see a neat screw-and-backplate on a tote handle than a heroic adhesive joint that fails the first time you lift it.

Brand and type comparison (evidence-based picks, not affiliate fluff)

I pick adhesives by chemistry and data sheet behavior, not by label promises. Look for published shear strength, substrate notes (especially for PP and PE), and reasonable working time for alignment.

Use these categories as examples of what to buy locally.

Adhesive type	What to look for	Best-use notes
CA + polyolefin primer kit (Loctite Plastics Bonding System category)	primer included, medium CA, clear instructions	Fast repairs on PP/PE when joint is tight and not impact-heavy
Medium CA (industrial grade)	medium viscosity, fresh bottle, optional activator	ABS, PVC, PS rigid breaks with good fit, avoid peel loads
2-part epoxy, slow cure (24 hour)	longer pot life, high strength, clear or filled as needed	Structural ABS, PC (test), PET, mixed materials, gap filling
Flexible epoxy	labeled flexible or toughened	Semi-flex plastics, vibration areas where brittle epoxy cracks
PU adhesive (non-foaming preferred for cosmetics)	controlled cure, minimal foam	Trim parts, mixed materials, joints with some movement
MMA plastic bonder (two-part)	specifically claims PP/PE, structural	Best shot on HDPE/LDPE/PP, also good for SMC and composites
PVC cement (ASTM D2564)	correct body (regular/medium/heavy), listed standard	PVC-to-PVC socket joints, choose viscosity for pipe size
CPVC cement (ASTM F493)	explicitly CPVC rated, temperature listed	CPVC hot-water supply repairs, use primer where required
Acrylic solvent cement (Weld-On category)	right grade (thin capillary vs syrupy gap-fill)	PMMA-to-PMMA clear bonds, best appearance when joint fits

Clamp time vs cure time (don’t stress it too early)

Handling strength is not full cure. If you load the joint early, you create microscopic failure that shows up later as a “mystery” pop-off.

Adhesive family	Handling strength	Full cure	Notes
CA	10 to 60 seconds	24 hours	humidity speeds cure, thick puddles cure slower
Epoxy (5-minute)	5 to 15 minutes	8 to 24 hours	convenient, but often lower strength
Epoxy (slow cure)	2 to 8 hours	24 to 72 hours	best strength, best gap filling
PU	1 to 6 hours	24 to 72 hours	dry air slows cure, some formulas foam
Solvent cement (PVC/CPVC)	minutes	2 to 24 hours	pressure lines require longer, follow label
MMA bonder	5 to 30 minutes	24 hours	temperature swings change set time a lot

When to Use Hot Glue (and when not to)

Hot melt is a mechanical grab, not a chemical bond. It can stick to low-energy plastics better than you would expect, but it is not structural and it softens with heat.

Use hot glue for cable management, light-duty positioning, vibration dampening, and temporary holds. Avoid it on sun-heated items, under-hood areas, and any joint that carries load.

Polystyrene foam can melt on contact, and high-temp guns can warp thin plastics. If you need a flexible semi-structural repair, choose PU or a flexible epoxy instead.

PVC Cement vs. CPVC Cement (fixed and completed)

PVC and CPVC are not interchangeable at the cement level. PVC cement is formulated to solvent-weld PVC pipe and fittings, and common products are listed to ASTM D2564 for PVC applications.

CPVC has different solvent sensitivity because of the chlorination that lets it handle higher temperatures. CPVC cement is formulated for CPVC systems and is commonly listed to ASTM F493, using solvent packages that properly soften CPVC and develop long-term strength under heat and pressure.

Primer is required by many plumbing codes for PVC and CPVC pressure joints, and many manufacturers require it regardless of local code. Primer (often purple) cleans and pre-softens the socket and spigot so cement can penetrate, and skipping it is a common cause of slow leaks.

Potable-water and DWV are different service conditions, and you should use cement rated for the specific system, pipe schedule, and temperature. Follow the pipe and cement manufacturer instructions and local plumbing code, because a “looks good” joint can still fail inspection or fail later under cycling.

Failure Diagnosis: Why Your Plastic Repair Popped Off

A clean peel where the glue comes off like tape means the adhesive never wetted or chemically keyed, usually contamination or low surface energy. Switch to a primer system, MMA, or mechanical reinforcement.

White haze around a CA repair is blooming, which usually comes from too much glue, poor ventilation, or trapping fumes. Reduce glue volume, ventilate, and avoid CA on clear show surfaces.

A rubbery joint that never fully hardens points to wrong mix ratio (two-part), low temperature, or inhibited cure from plasticizers. Strip it, clean harder, and use a compatible adhesive.

A crack right next to the bond line is often a rigid adhesive on a flexing joint, or stress concentration from a sharp corner. Add a backing plate, radius corners, and use a toughened epoxy, PU, or MMA.

Solvent crazing, clouding, or spider cracks near a clear joint means solvent attack on stressed PMMA or PC. Stop using that solvent, and switch to a compatible cement or a non-solvent adhesive after a test.

The Sand and Clean Prep Protocol (shop baseline)

When you do not know what prep is needed, this protocol prevents most failures. Clean with IPA, scuff appropriately, clean again, then bond without touching the area.

Use nitrile gloves and fresh paper towels or lint-free cloth. If you suspect silicone contamination (common on kitchen items), use a dedicated silicone remover and then re-clean with IPA.

Acetone as Glue-Remover and Glue-Maker (use with care)

Acetone can solvent-weld ABS and can be used to make ABS slurry for gap filling and rebuilding tabs. It can also destroy polystyrene and can haze or craze acrylic and polycarbonate.

Test acetone on a hidden area first. If you see whitening, hazing, or surface texture change, stop and switch to IPA cleaning and a non-solvent adhesive approach.

Gap-Filling with Baking Soda and Super Glue

CA plus baking soda is a fast way to build missing material and create a sandable fill. It cures hard and can be drilled, filed, and shaped, but it is brittle compared to many plastics.

Use it for edge rebuilds, small chips, and contained fills, then paint for cosmetics. Do not use it as the only structural element across a flexing crack.

UV-Curing Resins for Clear Plastic

UV resin is useful when you need long working time and a clear finish, but it is not the same as acrylic solvent cement. UV resin is best for shallow fills, cosmetic repairs, and light-duty clear bonds where you can cure through the resin.

If the plastic blocks UV or the section is thick, cure in multiple thin layers. For true acrylic-to-acrylic strength and clarity, a PMMA solvent cement is still the professional standard.

FAQ (high-intent adhesive selection)

What is the best glue for polypropylene (PP)?

For a structural PP repair, use a two-part MMA plastic bonder. If the break is small and tight-fitting, CA plus a polyolefin primer can work, and a quick flame treatment improves reliability.

What is the best glue for HDPE or LDPE (polyethylene)?

Use an MMA plastic bonder first. Your second option is CA plus a polyolefin primer, standard epoxies usually peel off PE without treatment.

What is the best glue for PVC plastic?

For PVC-to-PVC joints, PVC solvent cement is the correct choice because it solvent-welds. For small non-pressurized PVC items, medium CA or epoxy can work, but it is not a substitute for code-compliant pipe joints.

What is the best glue for ABS plastic?

Medium CA works for tight-fit breaks and tabs, and a slow-cure 2-part epoxy is better for strength and gap fill. If you can solvent-weld ABS with an ABS cement or controlled acetone method, that can be the strongest option for ABS-to-ABS with good fit.

What is the best glue for acrylic (PMMA, Plexiglas)?

Use an acrylic solvent cement (Weld-On category) matched to joint style (thin capillary for tight fits, thicker for small gaps). Avoid standard super glue on clear acrylic edges because it can frost and it is weak in peel.

Can you glue Teflon (PTFE)?

Not reliably with typical home adhesives. PTFE usually needs industrial surface etching and specialized adhesives, so at home you should plan on mechanical retention, fasteners, or redesigning the joint.

Can I glue polyethylene or polypropylene without primer?

Sometimes MMA will work without primer, depending on the product and surface condition, but standard CA and standard epoxy generally will not. If you need repeatable results on PP or PE, use MMA or use CA with a polyolefin primer and proper prep.

Why did my super glue joint snap even though it felt hard?

CA cures hard and brittle, so it fails in peel and impact, especially on parts that flex. Switch to a toughened epoxy, PU, or MMA, and redesign the joint to reduce peel.

Is hot glue good for plastic repair?

Only for non-structural, low-heat applications and temporary positioning. If the item will sit in a hot car, direct sun, or carry load, hot glue is the wrong tool.

References

Adhesive and Sealant Council. Structural bonding guidance for plastics and surface prep best practices.
Henkel Corporation. Loctite Plastics Bonding System technical data, primer use for polyolefins.
IPS Corporation. Weld-On solvent cement selection guidance for PMMA and other plastics.
Society of the Plastics Industry. Resin Identification Coding System.
3M Industrial Adhesives Division. Surface preparation guidance for structural adhesive bonding.