Styrene-butadiene rubber (SBR) AKA the various Goos or Goops thinned with either toluene or xylene, much much better than silicone. Lasts longer, more airtight, stronger and lighter. In the link I estimated I added 21 to 38g to an 8m foil kite so double sided. I don't think SBR is good for UV though but it is far superior in every other metric. Marine Goop has anti UV stuff added to it.Rufusz wrote: I applied the mixture to an old foil kite which was porous and the DWR layer was long gone and it worked like a charm.
Lasted about 1 season then it started sucking water again.
However the weight penalty was big as far
Is this silicon based coating good to reinforce the canopy of an old kite (not foil)?? The fabric has lots of wear and is falling apart... I want to try to keep it going a little longer. I already used sail repair tape on some areas, on the trailing edage, near the dacron, but I can't have it completly taped ...terryc wrote: ↑Mon Jul 29, 2019 8:59 amSo you want to coat ur sweet kite, here is how you do it...
Mix pure, new silicon sealant with turps/white spirit/mineral spirit (oudorless if possible). MIX thorughly then put into a clear water bottle and shake until the silicon is FULLY suspended, no lumps.
Apply two coats to the extrados 1st coat 5:1, then, leave overnight and then 2nd coat, 3:1 (3 parts white spirit,1 part silicon sealant). Be aware that the first coat will soak through and you dont want a slippery floor . The turps evaporates fairly quickly the fully silicon cures up to 24hrs later
The extrodos (outer surface) takes all the wear as its pumped up, deflated, and packed away on the sand (or whatever). Also the extrados takes the main UV hit. Best to start treating the kite in the first year. Im hoping that one treatment will last the life of the kite as silicon doesnt not break down. We will see!
It can be applied applied a broad brush and cereal bowl. Kite must be dried flat.
The kite weight will increase by the about the weight of the silicon chaulk, but the canopy will not hold water as it is hopefully non-porous. The kite MAY still be lighter than original weight.Tear strengh improves, hang time inproves, wear is reduced.
For the LE you may wish to try the window film, for areas that touch the sand (not tried) or car wax wipes. If the LE bladder is out u can coat the whole kite in one go (u dont want to unglue valves, or contaminate the bladder). Ive never had a strut blow out, so why add to the weight.
I live in thailand, UV damage is a bitch. Everytime u use the kite it gets lighter. Prevention is better than cure (and MUCH cheaper).
c u on the water..
Doctor Terry
PS..Hey, let me know how u get on!
Kapowski wrote: ↑Mon Aug 05, 2019 6:54 pmLast set of kites lasted 2 years before they got pretty past it. I'm almost at that age and I just can't find an excuse to get new ones. Sure I'm in Scotland and there's less UV than other places but the blurb says it doubles the lifespan of tent flysheets and I guess that's roughly what I reckon it'll do for current kites. They also shed water super well 12 months after I put it on. 2.5 L easily did a 3 kite quiver with some left over which I periodically dip my lines in. Totally unscientific but seems to be working at the mo and its pretty cheap.
(Sorry - don't know how to reply to specific folk)
need to know this tooBbking wrote: ↑Wed Aug 21, 2019 4:23 pmIs this silicon based coating good to reinforce the canopy of an old kite (not foil)?? The fabric has lots of wear and is falling apart... I want to try to keep it going a little longer. I already used sail repair tape on some areas, on the trailing edage, near the dacron, but I can't have it completly taped ...terryc wrote: ↑Mon Jul 29, 2019 8:59 amSo you want to coat ur sweet kite, here is how you do it...
Mix pure, new silicon sealant with turps/white spirit/mineral spirit (oudorless if possible). MIX thorughly then put into a clear water bottle and shake until the silicon is FULLY suspended, no lumps.
Apply two coats to the extrados 1st coat 5:1, then, leave overnight and then 2nd coat, 3:1 (3 parts white spirit,1 part silicon sealant). Be aware that the first coat will soak through and you dont want a slippery floor . The turps evaporates fairly quickly the fully silicon cures up to 24hrs later
The extrodos (outer surface) takes all the wear as its pumped up, deflated, and packed away on the sand (or whatever). Also the extrados takes the main UV hit. Best to start treating the kite in the first year. Im hoping that one treatment will last the life of the kite as silicon doesnt not break down. We will see!
It can be applied applied a broad brush and cereal bowl. Kite must be dried flat.
The kite weight will increase by the about the weight of the silicon chaulk, but the canopy will not hold water as it is hopefully non-porous. The kite MAY still be lighter than original weight.Tear strengh improves, hang time inproves, wear is reduced.
For the LE you may wish to try the window film, for areas that touch the sand (not tried) or car wax wipes. If the LE bladder is out u can coat the whole kite in one go (u dont want to unglue valves, or contaminate the bladder). Ive never had a strut blow out, so why add to the weight.
I live in thailand, UV damage is a bitch. Everytime u use the kite it gets lighter. Prevention is better than cure (and MUCH cheaper).
c u on the water..
Doctor Terry
PS..Hey, let me know how u get on!
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