Which Epoxy is Best for Plastic? Let's find out! 

This guy has saved us a lot of time and money. Appreciate all your work.

Interesting test. A couple points to consider: This is for one specific type of plastic (nylon?) bonded to steel. There are several other types us folks who repair our own or other cars also see: styrene, polystyrene, polypropylene, various types of polyelthylene (HDPE, LDPE, PET), polyamide. Would be very interesting to see the results with each plastic type as they all have different properties. How about the plastic bonded to itself for each type, such as when the home mechanic attempts to repair a plastic part? Often this is the only recourse, as folks like myself encounter broken plastic parts and replacements are not available. I rarely need to bond plastic to metal, but plastic to itself is of great interest. I look forward to seeing such a review from you!

I wanted to see you do THIS very project and requested it in the past, so THANK YOU VERY MUCH for the incredible work you do and for always being so logical, thorough and unbiased in all of your project setups, testing protocols and final analyses! I am a huge nerd who loves to learn but does not have the means, nor your degree of expertise, to perform ALL of the various product comparisons I've always wanted to do in order to work smarter--not harder. It is for this reason that your channel and the almost unbelievable plethora of project farm head-to-head tests / comparisons make my life so much easier. Without your high integrity testing methodology and truly unbiased approach, I'd be forced to rely on far more subjective "reviews" (too many of which shill for a particular brand unbeknownst to the consumer), or I'd have to accept the fact that many of my projects would quite likely have a higher degree of inherent failures due to lack of real-world data points from which to extrapolate the BEST or MOST SUITABLE product to meet my unique needs. Again.....working smarter, rather that harder, means I don't want to have rework, especially if it occurs multiple times for something that could have been avoided had I done sufficient research or had access to the kind of unbiased, side-by-side, practical comparisons that not only provide a simple excel-type table or spreadsheet of relevant specs & data points, but I have the advantage of being able to be a fly on the wall in your shop and to soak in the knowledge as I have time and need. One great thing that I've discovered over time by watching numerous head-to-head roundups here is that in nearly every case where I've performed similar tests--often ritualistic and very OCD-like tests to help me get over my anxiety & worry of choosing the wrong product for a task--or by trial and error I've learned volumes on what DOESN'T work, I find incredible comfort and satisfaction in discovering that YOUR TESTS SO OFTEN CORRELATE WITH MY REAL-WORLD FINDINGS. That has provided me a good measure of faith & trust in my own abilities to make accurate assessments and to logically discern the critical information necessary from so much of my everyday life; whatever the days bring my way and what will be next on my list of repairs, maintenance and upgrades to home, auto & tech! I know that's a LOT to read, but it is sincere and from the heart, thus I believe it carries more weight than a mere "thank you," even if that expression of gratitude is in ALL CAPS. LOL Again....I hope it is truly fulfilling for you knowing that you help so many through your work here on the channel. I realize this is NOT easy, nor cheap to pull off. Hell, the video editing skills alone are worth their weight in gold and I wish I could pick your brain on that subject as well. Happiest holidays to you and yours. Namaste. Cheers!

Nice review. Would of been nice to see a plastic to plastic bond. As that's what most people would use a plastic bond adhesive for.

Being a do it your selfer I cant tell you how much I love these videos. Greatly appreciate all your hard work.

Thank you all for continuing to provide future video ideas! Here are the links to the products tested in the video. Highly recommend shopping around for the best price. Best regards, Todd Gorilla Clear Weld: amzn.to/2Ynh3AX JB Weld Original: amzn.to/3j2SlxO JB Weld Plastic Bonder: amzn.to/3jaihHJ Loctite Ultra Gel Control: amzn.to/3hmyk4Z Super Glue Plastic Fusion: amzn.to/32kp5vR

Do so appreciate your taking the time and effort in testing so many products for us. I can see that you go out of your way to make these tests as accate and honest as you possibly can. THANK YOU!

It makes a big difference on which type of plastic you are trying to bond with. The different polyethylene types, polypropylene, polystyrene, and PVC all need different bonding agents to make a successful plastic weld. Picking up a regular off the shelf epoxy from a hardware store is asking for bond fail. Thanks for the video!

Another unbiased no BS test. Please don't sell out. These videos are very valuable

Thanks for putting all the time and effort into these tests so we don't have to. It is impossible to tell the difference between advertising and truthful claims without real tests like these. I really like how consistent you try to keep your tests. Keep the videos coming.

Thank you for you videos!! Whenever I want something compared Project Farms is always my go-to. Also the fact that you are replying to comments for a video that is 5 years old.....that's next level!

This review saved me about $1,000! Based on your tests I got the Loctite to fix a broken door handle on a high-end GE microwave. The handle had snapped off in a weird way because the screw fittings are all plastic. I think the flex test is the one that convinced me, based on pull and shear from normal usage. Found out this is a common breakage complaint with our model. Can’t just buy the handle without taking the door entirely apart and requiring some radiation testing above my pay grade. One week after application and a 24 hour cure, and it is still holding like it was never broken! And I’m a hero in the home! Thanks again!

This was a very tough test. You used nylon bolts. It is very difficult to get anything to stick to nylon. Good job as usual though.

One of the most interesting channels that I watch. Thanks!!

Great work as usual, have always been a fan and just love the consistency in the quality of your videos (the methods, tests, variants, and all around analysis)

Am I the only 1 that walks into his shop and notices I've got the worst types on the shelf and just throw it away and buy only what I learn from this channel now!! Thanks projectfarm

I'm in a real bind, broke an expensive plastic interior piece on a car... I can't tell you the feeling of happiness and relief when I see project farm did reviews on products I need. So thankful. Made my day.

Very interesting results, thank you for doing these videos - I've been keeping a log of the "winners (or ties)" regarding the different tests that you have done for different circumstances and it's a sincere pleasure to see the real deal without having to guess while standing in the aisles.

Amazing how much Todd's testing has improved in the last 6 years., I'd love to see this kind of test done again but with various plastic combinations

Brilliantly done, as usual. The scientific aspects you apply to all your tests is always revealing, and always makes me feel better about your results.

Anyone else find yourself watching these videos in the hardware store parking lot?

You always earn a thumbs up. The quality of your videos is amazing and it is very kind of you to use your own finances for our entertainment. Nice one.👍

Excellent stress test. You are the Consumer Reports of adhesive products. Its the best mechanical adhesion bond testing I've seen. Thanks so much. Keep-up the great work for us tinkerer/DIY/Maker Fair community.

Excellent vid. Classic Project Farm. What impresses me most is the creative way you conjure the torture tests. It allows your viewers to understand the overall quality of what your testing in many different ways. The viewer can determine what is best for their specific project. Kudos again!

Great videos, this channel should have 1 mil

You have tested steel to steel , plastic to steel , BUT , have you done plastic to plastic? That is the one I'm Really curious about. ...... point out if you have done plastic to plastic , I might be over looking it. Thanks

Just ran across this. Ingenious, I'm glad someone took the time to test. Thanks!

Speaking as a person who has actually designed research projects, I must say that your experimental designs are very well thought out! You put a lot of effort into minimizing extraneous variables. Gluing plastic is almost always problematic for me. Nylon is naturally "lubed" so especially tough. Same with polyethylene. Not much sticks to it, except labels when you want to remove them.... If I can, I will do bizarre surface preps like cutting holes or slots, sanding etc, and if using a suitable glue, I'll overglue to embed the parts in a blob of the epoxy. If faced with butt-gluing small plastic bits, I usually don't even try.

this is one of the best diy channels on RU-vid. Thank you for your time and energy. I hope it gets huge because People can learn a lot from these tests.

FINALLY! A very well thought out and executed demonstration (test). Super clear audio and make sense video. I like others, are awaiting your plastic to plastic tests. Great job!!

Over 4 years of work you have really polished your videos. Outstanding job!

Another good job on the testing, JB Weld has always been my go to for epoxy. Nice to know I was right at least once in my life.

Original J.B. Weld never ceases to amaze. It's the only one that I have had any real experience with (once I needed something to be clear in color and tried some generic 5-min stuff other than that I think it's always been j.b. weld) and I kind of felt myself rooting for it to outperform the others. Based on my past experience & your tests I think it's safe to conclude that you can't go wrong with regular 'ole J.B. Weld.... Next they need to figure out how to make it clear in color. Then there is absolutely no use for anything else. Great video, going to save me from reading the backs of 50 different epoxy packages just to choose J.B. Weld in the end anyway because there is too many choices and variants. Plastic specific epoxy seems like a gimmick when something made for steel outperforms them on plastic. Thanks for simplifying my life just a tad bit...

This is so informative! I always thought that the best epoxy would simply be the best epoxy. It seems that what it is used on and how it is to be used are of equal importance. One size doesn’t fit all. Thanks, Todd!

Definitely earned a thumbs up. I agree that it is hard to have a definite winner in this competition. I think we are all fans of JB Weld original.

Another well designed, objective and informative test and video. I use most of the epoxy adhesives featured in your segment and my experience with them is pretty consistent with the testing here. It’s good to see my experience replicated in a controlled comparison. Well done.

Great video as always. Part of the problem may lie in the type of plastic used to make those bolts. Delrin, Acetal, and Nylon 66 are examples of Copolymer and Homopolymer's that leach oils. There is a high probability that those bolts had lubricants added to them to provide lubricity to reduce friction, heat and to prevent galling when tightening on the matching nuts. These types of plastics leach oils and can prevent glues and paints from sticking to them.

The Loctite was quite impressive. The bolts you used are nylon, each plastic has profound differences in how they perform and react to things. Here's a tip taught to me by an old-school mold guy. Take a piece of known plastic and light it on fire (all you need is a sliver) Blow it out and sniff the smoke. NO TWO PLASTICS SMELL ALIKE and the smell is so strong you'll never forget it. All ethylene family plastics give off oils, To bond to them ya gotta remove the oils and since there's always more trying to come out it is a really improbable proposition. We used to use E-Beam Rastering to flash off the oil with some success. Some.

I thoroughly agree with people who requested that you do this test with various kinds of plastic, not just nylon. I'm particularly interested in the best way to glue metal to expanded PVC sheets. Thanks for your very informative videos!

I love how you make sure the experiment stays controlled only testing the independent variable, great job.

be better to test plastic to plastic strength

I have never seen you test in epoxy called pc-7 Growing up in the Northeast it was our go-to product. 40 years ago I remember standing in a hardware store as a child admiring this little statue they had on the counter that was a demonstration to pc-7 strength. A bottle filled with colored liquid with nuts and bolts and golf balls glued to it he could not pull apart. we use pc-7 on a variety of projects over the years and never were disappointed. I believe it is an equal to the original JB well if not better. Maybe a showdown pc-7 vs. J-B Weld? Anyways, another great video thanks

Great test answering many questions I’ve had on plastics & epoxies. Another super job. Thanks.

You’re in a league of your own. One of the best channels on RU-vid. Thank you for all the testing that you do, to help us out everyday, everywhere.

I was getting ready to fix my the plastic gas tank on my lawn mower. I have lots of small tubes of jb weld. It's not that I intended to buy multiple tubes. It's that I cleaned up my garage recently and found them everywhere. I was going to head out and buy a tube of jb weld for plastic to add to the pile. Thanks to your test, I will just give good old gray a try.

I know this is somewhat old either way I’d love to see a replay with new contenders with some of the newer epoxies. I’d even be willing to send you a couple of them to test myself. I also have a few other ideas that maybe we could discuss. Especially with the tool and hardware market getting a bit of a shake up as things are coming out everyday now that COVID has left many people at home to invent new things and they are starting to hit the market.

Very thoroughly tested. Thanks for helping us close the best products!

I know that you put a lot of time in all of your videos. We really appreciate your work and Thorough testing

8 months back it was mentioned that it would be better to also test plastic to plastic. In your Super Glue testing you did test plastic to plastic using PVC pipe. It would be real interesting to see how these would do with a plastic to plastic test.

Well thought-out demonstration. Love the summary table.

It’s almost as if he knows exactly the test I need for my projects. Saved money sure but more importantly it saved me time. Thank you!🙏🙏🙏

I really enjoy the info and tests that you preform.

First time on your channel and I love how thorough you are! However, I think it would have been good to test how much strength each had when being pulled directly away from the point of contact. I found this video because the door handle to my oven got yanked out and the housing holding the screws got stripped, and I wanted to see what product would be best to use. Thanks for the info!

Love these videos! You should get an engine and leave on only the metal parts and put it in a bonfire overnight to simulate being in a house/garage/structure/forest fire and then build the engine so u can run it and see what effects those temperatures would have on the whole engine to show what would happen and what part would fail first (if any) if someone tried to rebuild an engine that was in their home/garage when it burns down.

I've been watching your videos for quite some time. I appreciate you being unbiased and your "matter of fact" approach.

I greatly appreciate the amount of time, hard work, and science that is put into your videos! Thank you Project Farm!

The world can't thank you enough for these vids

Early this time around. I would like to see a plastic to plastic styled test. @Project Farm

Incredible effort on every single video! Thanks!

I'm so glad that you're doing these tests. Now I know which one I need to get.

I really appreciate the time, money and effort you put into your experiments. You help a lot of people out. Nice job man 👌 thank you.

you're getting pretty good at this, thanks for sharing.

I appreciate all the time, energy, and money that you invest to make all these excellent videos. I have been following you (as a subscriber) for several years. So far, it's clear to me that you do the best job of honest evaluations / comparisons of various products, you provide valuable information in doing so. Thank you, and keep em coming!

This channel maybe the best side by side comparison channels ever!! Thanks!!!

Also, I would recommend plastic to plastic tests with varying types of plastic.

Revisit this one please now that you have better test methods.

You are doing a great service to all DIY’s. Thank you!

Thank you! Your video was extremely helpful, and I look forward to viewing more of your content.

As always, a great 👍 sir. I’m always amazed at how much I can learn by watching your videos. I always wished my high school had some type of shop class, which it didn’t. If it did, you would have been the best teacher a young person could ever ask for! My friend, God bless you and yours! Stay safe and healthy and keep these awesome videos coming our way 😃

You sir. Have earned a new sub! Keep it up! Dont get hollywood on us when you get more famous :)

You demo was very helpful. Thanks!

4 years later and still such quality help!

Have you ever tested rapid fix 2 part adhesive. curious how that holds up.

looks like you need to choose the right epoxy for the right type of application. Good information here.

I've only used epoxy resin to stick a car number plate back on- yet I found this video interesting, informative and entertaining. Thanks for engaging my brain

I love how you have a video on everything. I find myself coming to your channel before I buy anything!

There was a Loctite ad before this video LOL ps. Mower man is new for Peter Thompson

Love your vids! I'd also like to see plastic-to-plastic, specifically ABS. I'm guessing those bolts were nylon? Nylon is more resistant to solvents than ABS, so these epoxies may perform better with ABS. Majority of the time, when I need an epoxy, it's to glue back a mounting tab, joint, or bracket that busted off some ABS plastic snap-fit thing. Lately, I've been repairing broken plastic things with LOCTITE 11C Hysol instead of my regular go-to, JB Weld. I'm curious how it compares.

Probably the most helpful and useful channels ever ! Thank you!

Another great vid. Hope you do plastic to plastic epoxy/glue tests as I have to fix my bumper soon!

10:37 For anyone needing a quick reference of his findings.

Sorry if I missed it, but what was the plastic bolt made of? Was it polyethylene or Polypropylene, Nylon, etc.

got a washer tub leaking and i did a google search on gluing plastic and made my day you done did a video

Always appreciate your videos, they always help me to make educated purchases and carry my money just a little bit further!

You should compare different types of penetrating oil such as PB blaster and liquid wrench. To see which one works best on rusted nuts and bolts.

Can you test threadlockers such as loctite and jb weld etc. and see if the work and wich works better? You can tight the bolts with the torque wrench using threadlocker and then mesure the torque required to loosen them .

Thanks for sharing, very revealing ! I’m trying to make a repair and this helps.

great video / experiment. You really did your best to isolate variables as much as possible and test different attributes.

Use a high temp cooking oil as a replacement for motor oil.

I must of picked the wrong week to quit sniffing glue.

Hi, I watch and count on them and your opinion on products. Thanks for all. And keep them coming!

Always great testing methods.

JB Weld again, and again, my favorite part about JB Weld is the two tubes. It's so easy for a single tube adhesive to gum up at the opening of the tube. I do wonder if the dual syringe design would be good against clogs for the kind of person that only needs a good, occasional adhesive. That being said, I'll probably stick with JB Weld as the default

Does adding sawdust or metal powder to epoxy help? I’ve seen forged in fire contestants do this a few times and science doesn’t seem to support it.

Thanks for doing these tests they help a lot. I really appreciate what you are doing.

Awesome! I love your informative videos. You save me lots of trial and error. I base my purchasing decisions on information gleaned from your videos! Thank you!

I would like to see pvc & HDPE plastic to steel test I assuming the bolts were nylon which are super tuff adhere. Also expanding foam. Great job. 5 stars

I watched this video a few times. I would re do the test with plastic glued to plastic.

I love your vids because the testing of stuff is really analyzing.👍

Awesome video. Much learned here. Great engineering experimentation. Thank you.