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Adhesive Recommedations Please

I

IA Monsterbuck

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I hope this isn't in the wrong forum, if so please move.

I need some help guys. My daughter who has Cerebral Palsy was given leg braces by the doctors to wear at night. They are plastic and have rubber soles glued on the bottoms so that she can go to the bathroom or walk in them without them being slippery.

The issue is the rubber soles peeled off once and I took them back to the medical center and had them replaced. (Hour drive each way and a week and a half wait for them to have them ready). And now the replacement soles have peeled off.

I need a strong adhesive that will bond the rubber soles to the plastic and not come loose.

Please help. Thanks in advance.

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I

IA Monsterbuck

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Pics if that helps...e44fd31283c1209b1fd227757acdebb0.jpg0d07d2b726ee4fe0d27d7bc2d4b97e3e.jpg4864a3599378b50b5406fbb2084cc829.jpg410a3a08ecc2863abc1295c5b8c3479e.jpg

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rustyjames

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It's difficult to bond to plastic. I would try roughing up the plastic with 80 grit sand paper and bond it with PL Premium. You can buy it at all the big box stores.
 
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MrSurly

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I’ll assume that the black sole piece is neoprene but the tricky bit is determining the material of the brace. I expect that it’s a polyester (rigid) but it could be polyethylene(?) (pretty soft).

Certain kinds of adhesives can destroy the thing if you pick wrong, so it would be best of you could contact the manufacturer to get their recommendation on adhesive and also to learn the material.
In lieu of that, you might be safe using 3M 08008 (weatherstrip adhesive).
I would try either that or “Goop” OR contact cement. But I’d really try to get the maker to weigh in first.


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4xdog

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I’d think of a contact adhesive, too, and of products from 3M as well.

Probably my first choice would be 3M Spray 90 adhesive.

Should be available at one of the big box hardware stores or an art supply store.

(My professional career of 40 years has been in polymer science and technology, especially water- and bio-based coatings and adhesives.)
 
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FANTM58

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not sure what its called, but i have this thin kinda clear tape used for automotive badging and trim. this stuff has never failed me. i believe its a 3M product
it came from Smalley & Co
 
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drmarkr

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Send me an email to: drmarkr at gmail

I will call one of the prosthetist's I work with tomorrow and get you their recommendation.

If this were mine, I would scuff with 60-80 grit sandpaper and then use contact cement or PL. Let's see what these "experts" say?

MR


EDIT: Looking closer at your pics, it looks like that may have been contact cement they used previously. But as smooth at the prosthetic is, I'm not surprised it didn't adhere...
 
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Lynden

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Dumber than lumber

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3M VHB - it is like carpet tape so it has a liner. But it will hold an airfoil down on a race car.
Good stuff.
Use a fresh blade on a utility knife to cut to shape AFTER you stick it down and BEFORE you remove the liner.
 
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el monte slim

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When I need a high-strength adhesive bonding of dissimilar materials, I've found nothing better than Elmer's Glue-All Max. Be sure to read and follow the instructions exactly as written when using this product.
 
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DGersic

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IA Monsterbuck said:
I hope this isn't in the wrong forum, if so please move.

I need some help guys. My daughter who has Cerebral Palsy was given leg braces by the doctors to wear at night. They are plastic and have rubber soles glued on the bottoms so that she can go to the bathroom or walk in them without them being slippery.

The issue is the rubber soles peeled off once and I took them back to the medical center and had them replaced. (Hour drive each way and a week and a half wait for them to have them ready). And now the replacement soles have peeled off.

I need a strong adhesive that will bond the rubber soles to the plastic and not come loose.

Please help. Thanks in advance.

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Click to expand...


You could try the glue search https://www.thistothat.com/

You might have to clean the glue off the sole first, or get them to provide a new, clean sole.

I’d be tempted to try 3M exterior mounting tape. That stuff sticks hard to everything.

https://www.walmart.com/ip/3M-4011-Exterior-Mounting-Tape-1-x-60/19902131



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TLGriff

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An old school solution would be Pliobond. Coat both surfaces, let it tack up and stick them together. The stuff will stick to anything and is stronger than ordinary contact cement.

Tom
 
OP
I

IA Monsterbuck

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Wow, what an array of recommendations. [emoji45]

I was going there would be some consensus.

I will definitely rough up the plastic with some sandpaper.

I'm going to have to read through the suggestions again.

Thank you all for your responses.[emoji106]

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MrSurly

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All of these ideas are truly pointless unless the OP can determine the materials involved.
The rubber sole piece really doesn’t matter as it could be replaced with probably a dozen different products, cheap and readily available.... but that boot is another matter because it’s NOT readily replaced and being medical, we can assume it costs a mint. Because it’s so thin plus it’s intended use, I suspect that it’s not ordinary old polystyrene or polyethylene. Could be nylon, propylene, lots of possibilities. The wrong guess about solvent based adhesives *could* cause embrittlement; softening, melting or otherwise destroy it.
The fact that someone put contact cement on it (based on appearance) and that didn’t work, suggests that the actual repair place didn’t even do their research, either.
I’d be going to the MFR for info.


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I

IA Monsterbuck

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drmarkr said:
Send me an email to: drmarkr at gmail

I will call one of the prosthetist's I work with tomorrow and get you their recommendation.

If this were mine, I would scuff with 60-80 grit sandpaper and then use contact cement or PL. Let's see what these "experts" say?

MR


EDIT: Looking closer at your pics, it looks like that may have been contact cement they used previously. But as smooth at the prosthetic is, I'm not surprised it didn't adhere...
Click to expand...
Email sent.

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OP
I

IA Monsterbuck

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Location
Iowa
MrSurly said:
All of these ideas are truly pointless unless the OP can determine the materials involved.
The rubber sole piece really doesn’t matter as it could be replaced with probably a dozen different products, cheap and readily available.... but that boot is another matter because it’s NOT readily replaced and being medical, we can assume it costs a mint. Because it’s so thin plus it’s intended use, I suspect that it’s not ordinary old polystyrene or polyethylene. Could be nylon, propylene, lots of possibilities. The wrong guess about solvent based adhesives *could* cause embrittlement; softening, melting or otherwise destroy it.
The fact that someone put contact cement on it (based on appearance) and that didn’t work, suggests that the actual repair place didn’t even do their research, either.
I’d be going to the MFR for info.


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Click to expand...
The repair was done by the medical facility that the braces came from. My assumption was that the soles were some sort of peel and stick deal.

I'm not sure I can come up with the exact material these are made of. I'm doubting the medical techs know but maybe I could get the name of the supplier.

I definitely think the brace needs roughed up some for adhesion. The brace is also not flat on the bottom, it rounds to fit the foot so I can see where the edges of the sole would be toughest to get to stay secured. We all know what will happen once the edge gets loose and starts to pull away.



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H

HenryAZ

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Barge. It's the go-to for saddle makers for bonding leather to leather. I've tried it on many different disparate surfaces and it will bond just about anything to just about anything. It is a contact cement, available on Amazon. It was the only adhesive I could find to bond neoprene bumpers to the bottoms of stainless pistol magazines. These things are dropped on the ground and generally see hard use.

I agree about roughing up the surfaces before application.
 
W

wssix99

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theoldwizard1 said:
Shoe Goo

Rough up the plastic and clean the sole with Acetone.
Click to expand...

This is the easy do-it-at-home remedy but won't be very durable.


drmarkr said:
Send me an email to: drmarkr at gmail

I will call one of the prosthetist's I work with tomorrow and get you their recommendation.

If this were mine, I would scuff with 60-80 grit sandpaper and then use contact cement or PL. Let's see what these "experts" say?

MR


EDIT: Looking closer at your pics, it looks like that may have been contact cement they used previously. But as smooth at the prosthetic is, I'm not surprised it didn't adhere...
Click to expand...

^ This is the best fix. I also agree that it doesn't look like the original person had the right tool for the job here - but professional prosthesis makers do!

If you have a local podiatrist in your area - they should have the right glue for this! They maintain prosthetic "orthodics" for their customers all the time and adhere foam and rubber to plastic. The stuff they use lasts for years.

Foot-Orthotic5.jpg




I just found an orthodics supply that lists this stuff as "the thing" for this:

https://www.amazon.com/dp/B07CSBXB5P/?tag=atomicindus08-20

Here's the instructions and MSDS that explains all the options and nasties that go along with it. The cement cures with a heat gun, which is consistent with the process my podiatrist used to give me a quick repair the last time I was in:

http://www.renia.com/tech_GB_E/170-GB_E.tech.pdf
http://www.renia.com/msds_GB_E/100-GB_E.pdf

^ You probably want a mast, Breaking Bad lab (or work in a well-ventillated area with this), etc. to handle the stuff.
 
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MoonRise

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Medical equipment that isn't 'working' and has broken/failed in some way in a rather short time span?

Contact the doctor(s) and have THEM contact the techs and the medical equipment manufacturers and THOSE medical folks (and their respective staffs and resources)

TO FIX IT AND MAKE IT RIGHT!

It is NOT your job or responsibility to try and fix it yourself.

It is THEIR job to find and PROVIDE the proper equipment and solution.

They want to just shrug or whatever and not FIX the issue?

After a few polite requests and conversations, my tone would be getting more and more 'Daddy Grizzly' if they were not responding and providing PROPER medical equipment.

Can you say "Product Liability"? Medical equipment, for a minor with a mobility issue, that loses the rubber sole that provides ALL the traction and grip from a hard plastic brace to the flooring and thus WILL result in said mobility-challenged minor slipping and falling?

Oh man, would a medical malpractice and product liability team of lawyers be salivating over THAT.

btw, unless you KNOW pretty exactly what the different materials are, anything we would 'recommend' over the Net would just be a guess. Maybe right, maybe wrong, maybe cause the materials themselves to fail or degrade and not just the adhesive bond from the rubber-ish soles and the plastic braces.

I'm all for DIY. This really isn't one of those situations.

IMNSHO
 
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drmarkr

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MoonRise said:
Medical equipment that isn't 'working' and has broken/failed in some way in a rather short time span?

Contact the doctor(s) and have THEM contact the techs and the medical equipment manufacturers and THOSE medical folks (and their respective staffs and resources)

TO FIX IT AND MAKE IT RIGHT!

It is NOT your job or responsibility to try and fix it yourself.

It is THEIR job to find and PROVIDE the proper equipment and solution.

They want to just shrug or whatever and not FIX the issue?

After a few polite requests and conversations, my tone would be getting more and more 'Daddy Grizzly' if they were not responding and providing PROPER medical equipment.

Can you say "Product Liability"? Medical equipment, for a minor with a mobility issue, that loses the rubber sole that provides ALL the traction and grip from a hard plastic brace to the flooring and thus WILL result in said mobility-challenged minor slipping and falling?

Oh man, would a medical malpractice and product liability team of lawyers be salivating over THAT.

btw, unless you KNOW pretty exactly what the different materials are, anything we would 'recommend' over the Net would just be a guess. Maybe right, maybe wrong, maybe cause the materials themselves to fail or degrade and not just the adhesive bond from the rubber-ish soles and the plastic braces.

I'm all for DIY. This really isn't one of those situations.

IMNSHO
Click to expand...

Not discounting the liability.....but the reality is this, from his OP:

"(Hour drive each way and a week and a half wait for them to have them ready)"
 
M

MoonRise

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re: long drive

Just put items in a box and SHIP them. To and from.

If these are 'stock' items or they already have the mold/measurements, just have them ship the new replacements to the house.

Wait time, I can't fix that one from here.

And if you really-really want/need to go DIY, you still need to KNOW what the SPECIFIC materials you are dealing with in order to have even a chance of using adhesives to bond the 'rubber' to the 'plastic'. And 'rubber' and 'plastic' are nowhere near specific enough of a description.
 
M

minke

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boat2230 said:
There is a marine adhesive called 5200 made by 3m it is water proof and very strong make sure to scuff with 80 grit and wipe areas with alcohol for best bond

https://www.amazon.com/dp/B0000AY6CA/?tag=atomicindus08-20

The fast or regular cure work equally as well note I have never tried on shoes used on a work boot and boot wore out before bond but the stuff is amazing
Click to expand...

3M 5200 is good for permanent bonds with a capitol P. If the soles might wear out and need replacement 4200 or 4000 might be better. While I don't really know much about adhesives (but that didn't stop me from replying) I suspect that these boat adhesives are overkill.
 
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wssix99

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MoonRise said:
re: long drive

Just put items in a box and SHIP them. To and from.
Click to expand...

These are specialized and I expect there is no substitute equipment while in transit and in the mail.

The specialized glue I posted sets with a heat gun. A few minutes and its done, which is why this is used in industry. Even when one walks into a doctors office for these repairs, they need to be done permanently on the spot.
 
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