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Old 05-31-2005, 05:34 PM
jjl jjl is offline
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Which Adhesive for fibreglass

I am putting a new front on my 70 vette. This is a 4 part front, top panel, two side panels and front pan. What is the best adhesive to glue these together and then to finally assemly the whole thing on the car.
I guess I could just use polyester resin with micro balloons, epoxy, or Sikaflex (that black urethane adhesive used to glue the ribs under a hood etc.
Any advice would be appreciated.

Jeremy.

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Old 05-31-2005, 08:58 PM
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Vette Panel Adhesive made by Evercoat, absolutely the best going.

http://www.evercoat.com/productDetail.aspx

Key in Vette in the search window

Vince
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Old 05-31-2005, 10:05 PM
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Quote:
Originally Posted by jjl
I am putting a new front on my 70 vette. This is a 4 part front, top panel, two side panels and front pan. What is the best adhesive to glue these together and then to finally assemly the whole thing on the car.
I guess I could just use polyester resin with micro balloons, epoxy, or Sikaflex (that black urethane adhesive used to glue the ribs under a hood etc.
Any advice would be appreciated.

Jeremy.
I have had a better experience with Eckler's fiberglass bonding adhesive than I have had with the Evercoat's Vette panel adhesive. I found Evercoat's a little too thin to get a nice round bead on the bonding strips. But, DO NOT use anything other than these products.

Both are CRITICAL to get just the right amount of activator mixed.
Do several timed tests on a piece of cardboard so you can judge the cure times to the color tint of the mix. Try to get a mix that gives you about 6 minutes of working time. Nothing is worse than having it cure faster than you can get your panel in place or getting everything together and finding out you didn't mix enough activator to cure at all. Believe me, as I have been there.
Do your test board and save it till your job is done.

Also, make yourself some paper cones for applying the adhesive.

Roger
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Old 06-01-2005, 06:27 AM
jjl jjl is offline
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Roger,
Are these paper cones similar to the bags that people use for icing (I think you guys call it frosting) on cakes. If so, can you tell me how you make them and use them. Is it just a piece of paper rolled up to a cone shape, filled with adhesive and sealed at the fat end. Press the adhesive out the narrow end to form a bead.
If this stuff sets in about 6 minutes, I will have to work fast. It is generally warm to hot all year round here. I will do it at night when it is cooler.

After I have assembled the front, should I paint the underneath before assembly onto the rest of the car?
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Old 06-01-2005, 07:48 AM
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I have not noticed a critical issue mixing Evercoat's adhesive. I have noticed the quick "kick time" though. This can be extended by mixing in a little less activator without adversly affecting the adhesion (my experience). Also if you keep the container inside until ready to mix that will extend your application time a little until it warms up to ambient.

Vince
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Old 06-01-2005, 08:10 AM
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Quote:
Originally Posted by jjl
Roger,
Are these paper cones similar to the bags that people use for icing (I think you guys call it frosting) on cakes. If so, can you tell me how you make them and use them. Is it just a piece of paper rolled up to a cone shape, filled with adhesive and sealed at the fat end. Press the adhesive out the narrow end to form a bead.
If this stuff sets in about 6 minutes, I will have to work fast. It is generally warm to hot all year round here. I will do it at night when it is cooler.

After I have assembled the front, should I paint the underneath before assembly onto the rest of the car?
Exactly right on the paper cones. Use some construction paper and tape.
Roll the fat end like toothpaste after stuffing with adhesive.

You are right, you will want to work fast. Get a helper if necessary. I have also found it easiest to mock up the panels to perfect alignment using small screws. Then, put your screws back in during the bonding process.

The screw holes are very simple to repair later with fiberglass resin and shredded matting. Use sandpaper to round the edges of the holes first.

I haven't ever painted the undersides of the fiberglass. The factory didn't do it either. I suppose it wouldn't be a bad idea as fiberglass can absorb moisture, but I think it is overkill as the undersides don't normally get flooded with water. I have never had a problem come up from not doing it but I have seen old fiberglass panels that have been removed from the car and left outside in the weather have the paint bubble.
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