what you need to do is very thoroughly prepare your surfaces, they have to be roughed up very well! You can do it with a plastic wire brush in a drill. I'm actually doing this at the moment so if you pm me your number I'll text you some pictures of the roughness.
The problem with doing it at the moment is the glue does not like the cold and you'd best wait for a month if you can't you'll need to ramp the hardener up in the glue a touch.25% say
Bostik 2402 probably 1/2 a litre
Plastic wire brush http://www.tooled-up.com/MicroCatego...=3877#prodlist
Roller or heavy scraper.
Buddy or two
disposable latex gloves
the Strake will be more flexible if it's warm so keep it in the house near a rad for a day or so before you go for it.
After prepping the strake and tubes wipe down with a rag and thinners. after a while waft the heat gun over the areas to ensure evaporation of thinners.
Masking tape either side of the glue line will ensure no overspill of glue but you want 10 mm width more glue on the tubes than the strake.
Mix the glue up with a small amount of thinners 10% and hardener leave for a minute then paint a thin coat on both surfaces when this dry do it again. previous to this you will have put on 2 pairs of the disposable gloves. It means you can get rid of the top pair when it gets too gluey. When this coat becomes tacky you have to do the sticking
Now that you and your buddy have gotten wasted on the glue fumes the job becomes a lot more fun
When you apply the strake it's a one time hit so you need to get it right. Also you have to stretch the strake on, pull it firmly as you are fitting it. when it's in place work the heat gun over it and rub it in firmly with the roller.
I have one of those brushes PM me your address and I'll send it to you we might have some glue too. If Christopher, Ribshop or Paul Tilley disagree with me then take there advice as they all have much more experience than me