Bill.Peyton
Well Known Member
When painting the fuse the painter decided to take the booth up to 140 degrees to accelerate the primer drying. Below is a photo of what happened to the left rear window. The top of the edge is picked away to reveal the sika adhesive on the surface. I also noticed the same thing with the doors and right side window at the rear only. all that was required to fix the doors and left side was a little block sanding. Only the right side was it actually lifted. Prior to the heat you could not detect any transition line at all.
The windows were attached using a 960-8 or -10 washers as a spacer and Sika adhesive. This was followed by 6 ounce 2" wide glass tape around the entire perimeter. The painter suspected that air was trapped in the adhesive, and the heat caused it to expand. I do not believe that the window flexed because the entire edge would have been lifted.
I repaired the left side by removing the tape and creating a v-groove for some epoxy mixed with flox and filling. One thing I noticed when I repaired this side was that the sika adhesive was right up to the glass tape, so the tape probably did not adhere the the Sika. I went back to my test panels to check the adhesion, and they were all good. I could not break the adhesive without breaking the plexi or the fiberglass.
The windows were attached using a 960-8 or -10 washers as a spacer and Sika adhesive. This was followed by 6 ounce 2" wide glass tape around the entire perimeter. The painter suspected that air was trapped in the adhesive, and the heat caused it to expand. I do not believe that the window flexed because the entire edge would have been lifted.
I repaired the left side by removing the tape and creating a v-groove for some epoxy mixed with flox and filling. One thing I noticed when I repaired this side was that the sika adhesive was right up to the glass tape, so the tape probably did not adhere the the Sika. I went back to my test panels to check the adhesion, and they were all good. I could not break the adhesive without breaking the plexi or the fiberglass.