A couple of thoughts
Just finished my 7 Slider canopy with Sika. Here are a couple of thoughts.
1) You can get the Sika from Amazon.com. Do a search. The prices vary. Also check Chemical Concepts. They have it for the best price.
2) Do a search on eBay for the primer. You can find some smaller bottles available. These aren't commercially available. I believe they are about 2 ounces. One bottle is about perfect for the main frame on the slider. I'll use the other bottle for the front wind screen.
These bottles are perfect for our use. The large bottle is expensive and you'll only use a couple of ounces of it. Once it is open it is going to die quickly and most will be wasted. Please note, the bottles I bought were expired. I spoke with with a rep from Sika and asked about this. They said as long as they are liquid, they are fine. He said the expiration date is required for some DOT regs. I still have one in the refrigerator for the wind screen later down the road.
3) Use only 3M Fine line tape for the tape line. It is formulated to deal with various chemicals in the painting process. I know others are going to tell you they used electrical tape or something similar with good success just don't do it.
4) Do lots of checking on all your measurements. Clamp everything together as if you were going to glue. Again check and double check everything. If you are doing a Slider, use ratchet straps to compress the frame. Compress farther than you think. It is amazing how much outward tension the glass has.
5) Don't get too amped up over getting a specific sized spacers in. 1/16" spacers are plenty. On the roll bar, I had my max thickness spacers at the center and they tapered down to nothing at the sides. Think about it, if you use 1/8" spacers on the whole thing, the edges are going to be 1/4" over sized on the sides, (total). This is hard make up for in the structure and is not needed. This stuff is extremely aggressive so if properly prepped the Sika is going to hold. Along the side rails my slider I used some thin nylon washers as spacers coupled with the fillets on the second pass. It ain't going anywhere
6) If doing again, I'd buy a cheap airbrush and spray the primer for an even coverage. The primer does not brush well and requires several passes to fill in streaks. I used a soft brush. I didn't want to try a foam type brush as I was concerned about incompatibility with the primer.
7) When you do your tape line, tape farther than you think you'll need to give room to build your fillet on the second pass. I had one area where I didn't leave enough room and had to retape and reprime before adding my final beauty coat of Sika.
8) Use a cup with some denatured alcohol and your finger to make your smooth fillet. I tried a couple of nylon forms for the fillet but the Sika is too aggressive. A bare finger and alcohol works great. Keep your finger moist for the best results.
These are the most important things I can think of right now. The process is very simple and the only way I'd do a canopy. Seems like a lot of work but it actually is quite easy. There are many ways to accomplish the same result. I studied all the available builder sites that Sika'd. I developed my plan and it worked to perfection. I'm about as picky as one can get!!!
Good luck and don't hesitate to ask questions.