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- เผยแพร่เมื่อ 28 พ.ค. 2020
- I've had a great many people ask my opinion on the Weldon products so I thought I would do a comparison. These are my first impressions. Let me know what kind of tests you would like to see for future comparisons. At the end of the video I also show and update and give some explanations on Wednesdays' video
Thanks for the explanation of how the filter works. Can't go wrong with plants. Hope your business continues to thrive. Thanks Fred O
Hey Fred! What do you think of this style of filter? I know it's not an UG but it does have some similar properties.
awesome, update us on your 24hr opinion. I would like to hear your opinion then compared to MC as far as hold and clarity go. Also think the 2mon tanks would be interesting to see! TC
Glad you like it! There will be updates on this for sure. They will be in other videos though as most don't like watching these technical vids. Thanks for atching!
Weldon-4 is great, I’ve used it several times and it dries crystal clear. It does allow a little repositioning after application (few seconds) but that’s about it. It needs at least 48 hours for cure time when building an aquarium for optimum results. It does have an odor but it doesn’t last long. I can’t wait to see your test results.
Thanks for coming by and sharing your experiences with it!
interesting comparison, i love it but still undecided about which is better
Hey Raliegh! So far there seems to be little difference, except the smell lol!
My understanding is how much work time u have or how fast it evaporates. 4 is slower than 3 in evaporation
I came to learn about MC, learned about passive water filtration. Good deal 👍
Hey, would this type of filter work for maintaining a pottable water system?
Did the light create an algae problem?
I'm glad you liked it! Some of these principles are used in some municipal water treatments. With this style of filtration I rarely get algae issues. Thanks for coming by!
Thanks for checking out the Weldon 4 and making a video on it. The stuff you are using is not easy to find here in the US unless I'm searching wrong.
i found it pretty easily i live in KY like boone-docks. found it locally but cheaper on amazon..
@@blkicemike4857 can you send me the link? Thanks
@@BorkPlays ,.. Amazon.com
just type "Weld-on 4" in search tab.
they also sell regular Methlene Chloride in 16oz. glass bottles.
It's crazy how different areas have different restrictions. Thanks for watching!
In the filter do you need to have that high of a flow rate? Basically I’ve built the same thing using only lava rock and I’m considering throwing some sand and gravel in there but I only run about 60 gallons per hour through there and it’s probably close to that size about 5 inches deep 6 inches wide and the whole container is 30 inches long, the only difference is it’s a black planter box and I have pothose in there.
Also what would be the difference between this and just having deep gravel in your tank and not cleaning it and just using a power head or something to move water in the tank around?
I love this one I think it looks awesome I would throw a few shrimp and snails in there too. Lol
Hey Shane! That's one of the great things about this style of filter, the flow rate doesn't matter much as long as the extremes are avoided. The only difference between this and having a deep bed tank is you are less likely to mess around with this and more likely to want to move things around and change plants and the like in a tank. Always great seeing you!
would weld on 4 pretty strong for welding acrylic hinges on to plexiglass for say on a sxs foldable hinges there would problably like 4 or 6 hinges across the bottom. I used to have a living hinge and the cold weather wore it out within a year.
In theory. Weldon has some additives to thicken it whereas methylene chloride does not. It also depends on what polycarbonate you're using. Some things called plexy aren't as high quality good acrylic.
Nice video! Two questions: 1) Would you say me MC is good choice for putting together a larger tank in terms of the strength it generates? 2) There's a lot of talk on the inherent toxicity of MC. What are your precautions in handling the stuff?
wear latex gloves & mask,.. don't breathe it in amounts, proper ventilation.
I actually never use it for large tank construction. I much prefer glass and silicone. I use acrylic almost exclusively for filter builds, though I am planning a large river build with it. These chemicals are toxic. Proper ventilation is necessary. Once it evaporates though it is perfectly safe. Thanks for watching!
Cool experiment! Looks like Weldon 4 is just fine but not good enough to replace Meth Chloride. I guess it's fine to have around if you're running low.
Hey Don! With all of the delivery issues lately I wanted to have another option for sure. Thanks so much for coming by!
I was wondering what you would recommend to repair a cracked acrylic basketball backboard? It's still in one piece but has a big crack down the middle. Thanks.
Not knowing the grade of the acrylic, it's difficult to say for sure, but welding the crack with methylene chloride should work well.
Very intresting filter 🤔
Thanks so much Joe!
is this kind of bonding good for holding some weight on your creation? I want to make a little box with clear acrylic (lets say 40 x 15 cm). This bonding with chloride will be able to hold some weight? (lets say 5kg)
That should be perfectly fine as long as you use acrylic of sufficient thickness. At least 1/4".
funny how you post a video on plastic solvent and found my bottle of model kit "cement" today .
then again modelling solvent is probably toxic and it does melt various plastic from ABS to PP.
but i wont be using for aquarium projects... i do have 7 unassembled model kits.
i have some scrap acrylic. took them from tent cards from my former work place, they have magnets which i removed. i plan to use them as dividers in my sump build and using one plate as a float valve holder.
the idea is to recirculate half/one third of my return pumps flow in the sump. when the pump is low and flow goes fully back into the tank when its high... so it varies the water flow in the tank
i want to replace my pump with a controllable DC pump. but that's on hold with corona... along with my idea to replace my RO system with just a dual carbon + Dual DI Resin filter.
my tap water is cleaner since they replaced the building old main water pipes made of iron with Stainless. so my issue is just chlorine/flourine.
Thanks for sharing that with me! DC motors are much easier to regulate flow with. I'm planning some very low flow rate delivery systems with one. All on hold for the moment of course. Thanks for taking the time to come by!
Unlike paint, stain or dye that could come off, if I wanted a permanent mark on the acrylic could I mix the Methylene Chloride with color before applying it with a paintbrush.
The second the methylene chloride touches the acrylic it marks it. If you could get a dye dissolved in it, you would have to be extremely accurate in it's application as there is no redo. I've never tried to do this so take any advice I give you with a grain of salt, but I would suggest mixing powdered acrylic in as well to thicken it up. This might prevent running. Please let me know how this goes, if you try it
@@FishmanEricRussell Ok, I appreciate the info. & advice.
What gauge needle do you normally use on syringes, and what did the Weldon 4 applicator come with? It seems a bit thinner in the video.
The syringes come with a 20 ga. needle. The exact size doesn't matter as it is the control the plunger gives that I really like. That and the ability to remove all of the air so I don't have to worry about the compression of the gasses altering the rate of flow. The dispenser that comes standard has a slightly narrower gauge but the things I don't like about it are: it tends to clog in short order, can't remove all of the air and the lid can leak. Hope that helps clarify things and thanks for watching!
@@FishmanEricRussell - But if the Weldon glue has some sort of thickening agent, a narrower needle means it will require a bit more force, which probably makes the "lag effect" caused by air in the applicator even worse. It probably clogs faster than a thicker needle would, too. The lid leaking is the cherry on top, though. :-P
@@RFC-3514 Liquid isn't compressible. So even though a bit more force is necessary you still don't get that gush of extra solvent you can get with the plastic bottles. I never used the Weldon long enough to see if there were additional clogging issues. I really didn't like the smell. I rather just dissolve some acrylic shavings in ME if I need a thicker solution. I used some in a demonstration video to compensate in a mocked up bad weld situation. th-cam.com/video/44_vQ7qieLA/w-d-xo.html
@@FishmanEricRussell - Yes, I know liquids aren't compressible, I just meant that a thinner needle and a thicker liquid require more force (regardless of gas compression), so it makes using their style of applicator even harder.
Anyway, I was vaguely interested in the Weldon glue(s) because the extra "adjustment" time can be handy, but it's really hard to find them where I live, so I think I'll stick to plain MC.
@@RFC-3514 The Weldon I was using wasn't thick enough to be a problem. If you want a thicker and therefor longer setup time try dissolving acrylic shavings in ME. It accomplishes the same thing
My acrylic is making tiny cracking fragments all the way up the seal when bonding the acrylic together any ideas why
I've seen that, but only with low grade polycarbonates and not with acrylic. What's happening is the surface is harder than the center and the solvent is breaking up the surface
Is your filter tank leaking as I see wet spots on the wood or a spill from aranging it?
Just a spill. Thanks for watching!
It has glacial acetic acid in it. That's where the robust smell come from. Helps with humidity. Methelyne chloride attracts moisture I'm told. That's why it's in there. It also slows down the evaporation. My wife's a chemist lol.
Thanks for the chem lesson, and for watching!
Could you put shrimp or snails or something like that in there? Would there be enough biological matter to support a colony of shrimp?
I'm definitely planning for shrimp, scuds and snails. There will be lots for them to eat. Thanks for watching!
Best place to purchase the MC? I only need a small amount
Unfortunately I get it locally. Sorry
What brand of MC do you use? FYI, A trick to prevent the liquid from "leaking/spilling" out from the syringe when using a Hypo Glue Applicator is to squeeze the bottle while holding it upright to push out air. While still squeezing, turn it upside down and slowly release. By doing this, the liquid is "vacuumed" to prevent from spilling. Have used this method for YEARS and no issues or spills....lol...For those whom are wondering where to purchase the GOOD MC, check with your local Sign supplier. If they know what their stuff They have PLENTY of the GOOD MC on their shelves... :) 😀
Sorry no brand. I get in bulk from my acrylic supplier. Thanks for watching!
Where do you get the Menthol chloride
I get it locally. Sorry
Weldon 4 will evaporate on the shelf in the can. Do your best to seal it tightly. Nothing worse than using it one time just to find an empty can a month later.
So true! I keep my high vapor pressure solvents in ground glass bottles. Thanks for passing that along and for watching!
@@FishmanEricRussell just the clear glass laboratory ones are dark ones? Also do you use the vacuum grease and where do you store it thanks in advance
@@TeresaMiAmore I have lab grade ground glass bottles, so I don't need to use grease
@@FishmanEricRussell thank you and where do you store it thanks on Advance!🙏
Really appreciate the comparison experiment, we can't get weldon 3 or 4 in uk as regulations don't allow its import, weldon 4c is the best we can do, managed to source some 99.9% mc or dicloromethane as its known here. Keep up the grest filter builds.
So glad you liked it! Crazy how restrictions vary so much from place to place. Thanks fo coming by
Would have been better to identify products as to which is which from the beginning.
Oops.
8:55 - And won't it eventually eat away at the syringe itself? AFAIK, only a few fluorinated plastics (namely PTFE) are actually resistant to MC.
Yes. The rubber gradually corrodes and has to be replaced. It does last allot longer than those dispensers though. I just make sure to empty the syringe right after use and to let it air out
@@FishmanEricRussell - I noticed the markings on the syringe are gone, too. I've heard that sometimes, rather than just dissolving (which I guess isn't great either, since it contaminates the solvent), they kind of "detach"from the syringe and float around the MC. Have you ever had problems with that (ex., clogging the needle)?
I know there are some glass & PTFE syringes made for lab use that will handle just about anything, but they all seem to have very silly prices.
@@RFC-3514 The markings are external and just gradually rub off. I tend to use my syringes far longer than I should. They don't actually come in contact with any chemicals. I've never had a needle clog. It is too easy to empty and purge the pathway after use. I have some ground glass syringes in the shop somewhere (lol) from my lab days. I should see if I can find them as a comparison
@@FishmanEricRussell - If the plunger is just glass, I suspect MC will manage to evaporate around it (might be slow enough that it won't matter, though).
The ones I found specifically made for "aggressive chemicals and gases" have PTFE (teflon) coated plungers, but they're $250 for the 25 mL version. For that price, I think I don't mind a bit of PP and rubber dissolved into my MC. :-P
@@RFC-3514 The ones I worked with back then were lab grade and could handle pretty much anything. I don't know if I still have any around. I will have to check.
I thought weld-on 4 was methylene chloride. Oh well, it will work for what im using it for anyway
Weldon has other additives to make it thicker. Methylene chloride is in it as well as the active ingredient
😎🐸👍🏻
Thanks for watching!
Fishman,.. aren't these items the same thing basically??? I mean Weld on is Methlene Chloride or however u say it,.. I know that weld-on#4 is thinner than weld-on#1 maybe backwards,.. but still active ingredient is MC..MethleneChloride...
I built my 60gal sump using this to adhere acrylic..I luv it!!
People 1st time users should really becareful though! use proper ventilation,eye protection, & so on. The fumes can overcome u if proper precautions not taken..
I was inspired by watching u build those filters, and i had to give it a try. My sump going strong 2yr now & no leaks.. I found that when sealing two pieces of acrylic together make sure no air bubbles get trapped. There are many lil tips and tricks i have learned,.. that make a big diff..My next task to learn,.. is to heat & bend acrylic. I want to build multiple hang on bak refuge type containers, bending one piece for front & sides, then just adding a piece to bottom, then welding that to the bak piece ( 3 pieces total) instead of 5 pieces. I think that'll look better.
Anyways kudos FISHMAN enjoy looking at your work!!!
It also contains Methyl Acetate and Methyl Methacrylate Monomer as thickeners, and yes these solvents are toxic so use proper ventilation.Those containers your planning sound cool. I would love to see them when you're done! Thanks for coming by!
Thanx 4 all ur info want 2 start working w acrillic.what should i use to bomd acrylic to plastic.stay safe
So you used the two methods, what were the results, without the results this was a waste of 14 minutes?
The only real difference between the two was that weldon took longer to set and was very smelly
@@FishmanEricRussell Thank you!
These products contain trichloroethylene and methyl methacrylate monomer, not just methylene chloride.
Yes. Weldon uses them as thickening agents. Gives more time to position and makes application a bit more forgiving. To me they just make it smell awful and too time consuming. I prefer the pure methylene chloride. Thanks for watching!
@@FishmanEricRussell Not just thickeners: the methyl methacrylate monomer is a gap-filling cement, aka superglue. So you are not purely solvent "welding" original material (actually not "forging" in the metalworking analogy), but instead cementing new acrylic that fills the joint. The solvents act more as surface activators than welders.
Is there anyone out there who is demonstrating bonding acrylic END TO END (i.e edge to edge???)🙄
The problem with joining edge on comes from damage to the area just around the seam from the methylene chloride. It's very difficult to prevent this
@@FishmanEricRussell Hi there. That's very interesting. Can you expand a little bit on this? When you say damage, do you mean deformation?
@@FishmanEricRussell P.S. in my case, just to be clear, I am not concerned with how good the welded joint looks, my main concern is, is it practically possible to join acrylic pieces edge to edge? Thanks 👍
You can, but it is a weak joint@@ndc982
No. What will happen is the edges melt and become discolored. This can be anything from a little melted look to white@@ndc982
active ingredient in weld on is Methlene chloride,.. its the same thing fellas,.. weld on comes in diff thicknesses only diff i found..
Yes ME is the active ingredient as the solvent. It also contains Methyl Acetate and Methyl Methacrylate Monomer as thickeners. I'm not sure but the different numbers probably just vary the ratios to make it easier to work with. Thanks for coming by and sharing that!