With its strong bonding power and versatility across various surfaces, Gorilla Glue seems like an ideal solution for DIY projects and quick repairs around the home. But does it work as effectively on plastic items as it does on wood, metal, and more? The short answer is: it depends. Gorilla Glue’s performance on plastics varies based on the specific formula and type of plastic material.
Key Takeaways on Gorilla Glue and Plastic
Here are the essential points to remember:
- Not all plastics are created equal – Unique properties determine if Gorilla Glue will bond effectively.
- Original Gorilla Glue has severe limitations – Only works on extremely rigid, durable plastics due to bonding pressure.
- Gorilla Super Glue is better, but still limited – Provides only semi-permanent bonds on hard plastics.
- Gorilla Glue Epoxy works on many plastics – The best Gorilla Glue product for versatile, high-strength plastic bonds.
- Specialty plastic adhesives may be optimal – Designed to specifically melt/fuse compatible plastic types.
- Identify plastic material – Recycling code, product research, or solubility tests can reveal type.
- Always test first – Try any glue on an inconspicuous plastic area before fully applying to a repair or project.
A Primer on Gorilla Glue Products
Before we dive into plastic compatibility, it helps to understand the characteristics of the main Gorilla Glue adhesive products:
Original Gorilla Glue
This is the original Gorilla Glue formula – the tan-colored, expandable polyurethane glue that put the brand on the map. It is known for its incredibly strong and permanent bond on wood, stone, metal, ceramics, foam, glass and more.
Key features:
- Expands 2-3 times when drying for a super tight bond
- Bonds porous and non-porous surfaces
- 100% waterproof and weather/mold/mildew resistant
- Dries tan in color
Gorilla Super Glue
The Gorilla Super Glue formula aims to combine the strength of Original Gorilla Glue with the convenience of a fast-drying super glue. It works on a variety of materials including plastic, wood, metal, ceramic, rubber and more.
Key features:
- Bonds plastic, wood, metal, ceramic, rubber and more
- Sets and dries quickly – good for quick repairs
- Anti-clog cap helps keep the glue from drying out
- Won’t drip or run – creates precise bonds
Gorilla Glue Epoxy
This two-part adhesive combines Gorilla Glue’s bonding power with the high strength and durability of an epoxy. It is ideal for plastic, metal, ceramic, wood and more.
Key features:
- Handles repairs on plastic, metal, wood, ceramic and more
- Offers an incredibly strong, long-lasting bond
- Water and temperature resistant
- Sets in 5 minutes, dries in 1-2 hours
Now let’s look at how these three main formulas work specifically with plastic.
Using Original Gorilla Glue on Plastic
The Original Gorilla Glue formula is not generally recommended for use on most plastic materials. Here’s why:
It Can Damage Many Plastics
When Gorilla Glue cures, it expands significantly and becomes quite rigid. Many plastics cannot withstand this expansion force and will crack under the pressure. The inflexibility of the dried glue also limits the plastics it can work with.
Gorilla Glue is an incredibly strong adhesive, but that intense bonding power works against it when used on delicate plastics. Unless the plastic is rigid and durable enough to handle the expansion and hardened glue, it likely won’t end well.
Limited Plastic Compatibility
While Gorilla Glue can successfully bond a few plastic types, it is not universally compatible. Each plastic has a unique chemical composition that reacts differently with adhesives.
Without comprehensive compatibility testing, there is no reliable way to predict if Gorilla Glue will properly cure and adhere to a given plastic. It’s a gamble.
Weak, Temporary Bonds
Even if Gorilla Glue seems to bond two plastic surfaces initially, the long-term hold may be very weak.
When an adhesive does not fully cure with a plastic, it leaves behind a brittle bond that will likely fail over time. Any stress or movement can cause the bond to break apart.
When to Use Original Gorilla Glue on Plastic
While Original Gorilla Glue is not recommended for most plastics, it can work in certain situations if used very carefully:
Rigid Plastics
Thick, rigid plastic materials like PVC plastic piping are best suited for Gorilla Glue. The hardness allows the plastic to resist cracking as the glue expands and dries.
Always test first on an inconspicuous area to ensure the plastic can handle the expansion. Clamp pieces together as it cures to help strengthen the bond.
Small Repairs
For small plastic repairs like gluing back on a broken handle or sealing a crack, Gorilla Glue may get the job done. Keep bonded areas small and properly clamp components together as the glue dries.
Non-Critical Projects
Gorilla Glue could potentially work for an arts and crafts project or other non-critical use where a failed bond won’t cause issues. Again, test a sample bond first before applying it to an entire project.
Tips for Using Original Gorilla Glue on Plastic
If you determine Original Gorilla Glue is appropriate for your particular plastic application, follow these tips to get the best possible results:
- Clean surfaces thoroughly – Remove all grease, oil, dust and debris so the glue can properly penetrate the plastic.
- Lightly roughen smooth plastics – Use fine sandpaper to help the glue grab onto slick plastic surfaces like PVC, acrylic, polycarbonate, etc.
- Clamp tightly – Use clamps or heavy objects to apply firm pressure as the glue expands and dries. This helps maximize the bond strength.
- Mist with water – Gorilla Glue cures by reaction with moisture. Lightly misting bonding surfaces speeds up cure time.
- Apply thinly – Do not overapply. Thin glue lines are less likely to expand and crack plastic.
- Allow proper cure time – Clamp overnight for full cure. Bond will weaken if stressed before fully cured.
Even with these precautions, Original Gorilla Glue may fail with plastic. But following these tips boosts your chances of success.
Using Gorilla Super Glue on Plastic
Gorilla Super Glue is a step up for plastic bonding compared to the Original formula. Its cyanoacrylate adhesive composition is designed for versatility across various materials, including some plastics.
However, it still has limitations:
Not Universal
The label states Gorilla Super Glue bonds plastic, wood, metal, ceramic, rubber and more. But don’t take this as an indication it works on all plastics.
The reality is that no super glue bonds every type of plastic. Each plastic has unique properties that determine adhesive compatibility. There’s still guesswork involved.
Brittle Bonds Over Time
Cyanoacrylate glues like Gorilla Super Glue create rigid bonds that don’t flex well. This brittleness can cause bonds to fail over time, especially if bonding thin or flexible plastics.
The inflexibility also limits Gorilla Super Glue to certain rigid, durable plastics that can handle the stiffness. More delicate plastics may crack under the strain.
Weak Bond Strength
For plastics that Gorilla Super Glue does work with, the actual bond strength can still be weaker compared to wood, metal and other materials.
While sufficient for low-stress repairs, the plastic-to-plastic adhesion may not be strong enough for high-impact applications.
When to Use Gorilla Super Glue on Plastic
Gorilla Super Glue is a reasonable option for minor plastic repairs and crafts when used properly. Here are some of the best applications:
Rigid Plastics
Hard, inflexible plastics like PVC, ABS, acrylic, polycarbonate and styrene respond best to Gorilla Super Glue. The cured glue bond won’t flex and stress delicate plastics.
Small Repairs
It works for quick fixes like sealing cracks, reattaching broken handles or gluing plastic pieces on toys, furniture and appliances. The fast-drying formula provides convenience.
Craft Projects
For hobby, craft and school projects using rigid plastics, Gorilla Super Glue can temporarily adhere components together. Just don’t expect incredibly strong, permanent bonds.
Smooth Surfaces
The thick gel formula is less likely to run or drip, making it easy to apply on smooth plastic surfaces.
Tips for Using Gorilla Super Glue on Plastic
Follow these tips when using Gorilla Super Glue for plastic bonding:
- Determine plastic type – If possible, identify the plastic material to check compatibility. The recycling code imprinted on many plastics can help.
- Clean bonding surfaces – Wipe away any oil, grease or debris for optimal adhesion.
- Apply very thin layer – A little dab of Gorilla Super Glue is all you need. Too much can result in drips or a weak bond.
- Press surfaces firmly – Ensure parts are pressed tightly together as the glue sets for maximum strength.
- Allow adequate curing – Bond should fully cure in 24 hours before stressing.
- Expect semi-permanent bond – Gorilla Super Glue is not designed for permanent plastic repairs. Bonds may deteriorate over time.
With proper precautions, you can successfully use Gorilla Super Glue for small, non-critical plastic fixes. But for heavy duty jobs, a plastic-specific adhesive is recommended.
Using Gorilla Glue Epoxy on Plastic
The Gorilla Glue two-part epoxy system offers dramatically better plastic bonding capability versus the other Gorilla Glue products. Here’s why it’s more effective:
Designed for Plastics
Gorilla Glue Epoxy is engineered to bond plastics, unlike the Original and Super Glue formulas. Plastics are prominently featured on the packaging label.
The epoxy resin chemically fuses to many plastic types to create an incredibly strong, permanent bond that won’t crack or deteriorate.
Flexible Bond
Gorilla Glue Epoxy maintains some flexibility when cured, unlike cyanoacrylate super glues. This significantly reduces the chance of bond failure and cracking from stress or impact.
Withstands Harsh Conditions
Gorilla Glue Epoxy bonds can withstand temperature extremes, moisture, and heavy use/abuse. This makes it suitable for exterior plastic repairs that face weathering.
Long Work Time
The 5 minute set time and 1-2 hour cure gives you plenty of flexibility to align plastic pieces before the bond hardens.
When to Use Gorilla Glue Epoxy on Plastic
Thanks to its superior plastic bonding capability, Gorilla Glue Epoxy can be used in all the same applications as the Original and Super Glue versions, plus heavy duty situations where extra strength is needed.
Large Repairs
Gorilla Glue Epoxy is strong enough to permanently repair cracks, holes, and damage across large surface areas of plastic. The flexible bond and epoxy strength prevent future cracking.
High-Stress Applications
For plastic repairs that will undergo heavy usage, force, or impact, Gorilla Glue Epoxy is up to the challenge. It creates incredibly strong, resilient bonds.
Outdoor Repairs
The waterproof, temperature resistant properties allow Gorilla Glue Epoxy to permanently fix outdoor plastic items that face weathering wear and tear.
Diverse Plastic Types
Thanks to broad plastic compatibility, Gorilla Glue Epoxy can be used across many different plastic materials for flawless bonds.
Tips for Using Gorilla Glue Epoxy on Plastic
Follow these tips when using Gorilla Glue Epoxy for plastic bonding:
- Determine plastic type – Identify the specific plastic material if possible. Some plastics may still not be compatible.
- Clean surfaces thoroughly – Remove all grease, oil and debris for optimal adhesion.
- Lightly roughen smooth plastics – Use 120 grit sandpaper to help the epoxy grip.
- Follow mixing directions – Properly mix equal parts resin and hardener as directed on the labels.
- Apply mixed epoxy thinly – Spread a thin, uniform layer across both plastic bonding surfaces.
- Clamp components tightly – Use clamps or heavy objects to secure the plastics together as the epoxy cures.
- Allow full cure time – Let cure for a full 24 hours before stressing the bond.
Gorilla Glue Epoxy requires more prep work than other glues, but delivers unbeatable plastic bonding power. Follow the directions closely for successful repairs.
Alternatives to Gorilla Glue for Plastic Bonding
While Gorilla Glue Epoxy works for many plastics, it is still not universally compatible with every type. And the other Gorilla Glue products have significant limitations.
In some cases, alternative plastic adhesives may be better options:
Plastic-Specific Glues
Specialty adhesives like plastic cement, acrylic glue, or polystyrene cement are designed to chemically melt and fuse compatible plastics together. This creates an incredibly strong bond optimized specifically for those materials.
Epoxy Putty
Epoxy putties let you mold and shape repairs before hardening. Great for filling gaps, cracks and holes in plastic. Bonds to almost all plastics and dries rigid and durable.
Contact Cement
Some contact/solvent cements dissolve the surfaces of compatible plastics to form super strong bonds. Useful for specific plastics like PVC, ABS, styrene sheets.
Cyanoacrylate (Super Glue)
Hardware-store super glues provide a quick fix for minor plastic repairs. But results can be brittle and temporary. Look for “plastic bonding” formulas.
Identifying Plastic for Optimal Bonding
To pick the best adhesive for plastic, it helps to know what type of plastic you are working with. Here are some tips for identifying and testing mystery plastics:
Check Recycling Code
Look for the triangular recycling symbol imprinted on the plastic item. The number code in the center reveals the plastic type:
- #1 PETE (Polyethylene Terephthalate)
- #2 HDPE (High Density Polyethylene)
- #3 PVC (Polyvinyl Chloride)
- #4 LDPE (Low Density Polyethylene)
- #5 PP (Polypropylene)
- #6 PS (Polystyrene)
- #7 Other (BPA, Polycarbonate, etc.)
Test Solubility
Place plastic shavings in chemical solvents like acetone, MEK, or adhesives to see if the plastic dissolves. This can help identify type.
Look Up Product Details
Search the internet for product specs of plastic items to find out exactly what plastic material it is made from. Knowing the details helps match appropriate adhesives.
Try Plastic-Specific Glue
Attempt bonding a scrap piece of the plastic using a specialty glue designed for that plastic type. If successful, you’ve identified compatibility.
Armed with the plastic ID, you can look up adhesive recommendations to find the best match. Then test any new glue on a sample piece before tackling the actual repair.
Final Thoughts
While not a cure-all for every plastic, Gorilla Glue Epoxy can be quite effective when used properly. Just take precautions, test compatibility, and consider specialty adhesives for certain plastics and applications. With smart glue selection, you can take on just about any plastic project or repair.