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Discussion Starter #1
This question has probably been asked before, but what in you opinion is the best adhesive to use on re-attaching the inner front fender skirt to the fender? Does 3M make something that would be suitable? I have one that has broken loose, and it is a must-fix before I drive her much... (afraid it may end up wrapped aroung my front wheel)....:lookinup:
 

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I would use west systems epoxy with micro balloons to make it thyxotropic (peanutbutter like consistency)

Is there a boating shop or something nearby? They usually have the good stuff


Marck
 

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I would buy whatever the local automotive paint store recommended and had in stock...........just remember to grind both surfaces back to bare glass. I saw the Dream Car Garage guys use something out of a caulking gun to bond a hood skin to a factory type inner structure....
.....redvetracr
 

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Does 3M make something that would be suitable?
Yes they do.
First........what year is the car in question?




For a '73 on up......
"3M Panel Bonding Adhesive" I usually have a cartridge in my garage, but tonight I do not :(
Have plenty at work.........will get you a part number and photo tomorrow.

This will work just fine on SMC, Don't know about GRP???????? never tried it.
It will also bond metal panels as well and also works great on most all
late model flexible (non-fiberglass) bumper covers. Has a dispensing tube
to get to hard to reach areas.

I generally use it for Door and roof skins as well as wheel openings when
replacing 1/4 panels.

I did a C4 several months ago that the whole rear shell had come loose from the inner structure.

Stay tuned........................:D
 

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3M, Fusor, and SEM all have 2 part adhesives designed specifically for bonding body panels and they are available at automotive paint stores. These adhesives are extremely strong and are used on most steel cars today in place of welding. The adhesive packs cost around $30-$50 but require special application guns which mix the 2 parts together and can cost upwards of $250 just for the gun. Each manufacturer has a different gun and mixing nozzle designed for their adhesive.
SEM has the least expensive gun at around $60. If you want to use 3M or Fusor, you might find a used guns on ebay.
There are a lot of adhesive choices in each brand depending on set time, thickness, and type of surfaces to be bonded. For example SEM 39337 will bond SMC to SMC or SMC to steel. 39747 is another SEM adhisive that will work for you, bonds all surface types and gives about an hour of working time.
 

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Discussion Starter #8
Thanks for the info! SMYDA, the car is a 79. I'm not sure what the difference is between SMC and GRP? I was under the impression that SMC was the plastic type material used on the 83 on up models?

There are quite a few boat shops in the Phoenix area. More people in Arizona own boats than any other state, and we don't even have water... go figger.:crazy:
 

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Your '79 has SMC panels. Evercoat makes a good adhesive that comes in a can, I bought it on Ebay for $40 incl shipping. I think it was Evercoat 993, search for Evercoat SMC adhesive and you'll find it.

3M makes very good SMC adhesive but they sell it in cartridges for a dual cartridge gun, the gun is $80 so it's only worth it if you use it a lot....
 

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Discussion Starter #10
Your '79 has SMC panels. Evercoat makes a good adhesive that comes in a can, I bought it on Ebay for $40 incl shipping. I think it was Evercoat 993, search for Evercoat SMC adhesive and you'll find it.

3M makes very good SMC adhesive but they sell it in cartridges for a dual cartridge gun, the gun is $80 so it's only worth it if you use it a lot....
Thanks MyBad. Is the Evercoat a brush on application? Also, what does SMC stand for? Sorry for the stupid qustions, but I'm rather new to this fiberglass stuff...:(
 

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Thanks MyBad. Is the Evercoat a brush on application? Also, what does SMC stand for? Sorry for the stupid qustions, but I'm rather new to this fiberglass stuff...:(
That Evercoat adhesive is thick like Bondo putty, it comes with a cream hardener (blue, not pink like Bondo) and it can be used as an adhesive or body filler.
SMC is sheet molded compound:
http://appliedcompositescorp.birkey.com/overview.asp

From what I've read they use a release agent so they can get the piece out of the mold, that release agant prevents the common fiberglass polyester resins to stick to SMC....

I used the Evercoat adhesive to glue my fender flares to the SMC panels - no complaints here... :thumbsup:
 

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Discussion Starter #12
That Evercoat adhesive is thick like Bondo putty, it comes with a cream hardener (blue, not pink like Bondo) and it can be used as an adhesive or body filler.
SMC is sheet molded compound:
http://appliedcompositescorp.birkey.com/overview.asp

From what I've read they use a release agent so they can get the piece out of the mold, that release agant prevents the common fiberglass polyester resins to stick to SMC....

I used the Evercoat adhesive to glue my fender flares to the SMC panels - no complaints here... :thumbsup:
Interesting.. I'm learning..:cool:
 

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Thanks for the info! SMYDA, the car is a 79. I'm not sure what the difference is between SMC and GRP? I was under the impression that SMC was the plastic type material used on the 83 on up models?
First.....there are no stupid questions:thumbsup:

GRP is what everyone thinks of when they think about fiberglass.
Typically what boats are made of. It has a rough texture on the back side.
'53 thru '72 Corvettes were made of GRP, with the exception of a few panels
like hoods in later years........from what I understand.

In '73 SMC was used through out the car. There seams to be a difference
between the SMC used on the C3s and what is used on the C4 and up cars.
SMC can be identified by its marble like appearance and the fact that it is
slick on both sides of the panel.

As I had stated in my introduction thread, "there's more than one way to skin a cat."
The products mentioned so far are all good products. It comes down to personal
choice in most cases. The 3M product is what is use the most in the Body
Shops in my area. We use a lot of Evercoat products as well but I do not
have experience with their panel bonding agents.

Here's a pic of the product I mentioned in the last post.
As mentioned by others, it may not be the most cost effective for the
Do-it-yourselfer. But I can vouch for the integrity of the product. And it
can also be used for a number of purposes besides SMC-glass repair.
Cartridges come with two mixing tips, extras can be purchased.
It is sandable and will feather nicely (though it is not the easiest stuff to sand:D )
It can be topcoated with most any polyester filler.


Here are two different dispensing guns: The top one is my personal gun I
bought several years ago. I honestly don't remember how much but I think
it was in the $50.00 range. The lower gun is one of the $250+ types.
My personal gun works far better than the expensive one.


The advantage to going this route is it is easier to apply the bonding agent
in hard to reach areas. One can do neat and cleaner work. Also 3M makes
other products like seam sealers and automotive foams that are applied the
same way with the dispensing gun.

Like I stated earlier it comes down to personal preference and budget.
I hope this helped answered your question regarding 3M.:cheers:

If you find another product that gets the same job done....................
and to your satisfaction...........that's all that matters ;) :thumbsup:
 

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I would use west systems epoxy with micro balloons to make it thyxotropic (peanutbutter like consistency)

Is there a boating shop or something nearby? They usually have the good stuff


Marck
They build fountain race boats about 50 yards from shop. :D And welcraft down the street
 

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Discussion Starter #19
Here I always thought fiberglass was fiberglass. Thanks for the education.:thumbsup:
I like the idea of the caulking gun application for the simple reason of being able to get into tight areas (as you stated.) Gives me some ideas of the options I have.
 
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