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Recoating kite fabric

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gwicke
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Re: Recoating kite fabric

Postby gwicke » Fri Mar 31, 2017 10:49 pm

A downside of silicone caulk is its softness, which I think contributes to the fabric remaining relatively stretchy along the bias (diagonally). Looking at a few datasheets, it seems that harder silicone formulations contain more fumed silica (cab-o-sil) filler, which is also commonly used to thicken up Epoxy (and toothpaste). The GE caulk I used has around 5-10% for a 20 shore A cured hardness, while slightly harder silicones have 15%. http://www.cabotcorp.com/~/media/files/ ... rubber.pdf has a graph indicating that 30% fumed silica by weight would result in a 46 shore A hardness. That might be a bit extreme, but I could see adding 5-10% to silicone caulk work well.

Slyde
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Re: Recoating kite fabric

Postby Slyde » Thu Sep 20, 2018 8:55 pm

Reviving this thread. Foilholio can you update us on how the shoe goo/toluene coating has held up over time?
Also has anyone any experience with CRC aqua armour which seems to be some sort of naphtha petroleum waterproofing spray. It looks easy to apply but may be only a waterproofing rather than a sealant as it is advertised as breathable.
Cheers

foilholio
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Re: Recoating kite fabric

Postby foilholio » Sun Sep 23, 2018 12:37 am

Sorry I havn't actually used that kite much anymore so it is not a good gauge on the longevity of the coating.

Gyre
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Re: Recoating kite fabric

Postby Gyre » Mon Sep 24, 2018 7:44 pm


Slyde
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Re: Recoating kite fabric

Postby Slyde » Tue Sep 25, 2018 8:26 am

Its based on chemical nanotechnology......so it must be good. That statement is enough to put me off. Why do manufacturers feel the need to add this crap to their marketing. Just makes me suspicious that I am being taken for a ride

Gyre
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Re: Recoating kite fabric

Postby Gyre » Tue Sep 25, 2018 1:54 pm

Yah I know! Everyone knows it's Quantum Physics that makes stuff waterproof, not chemical nanotechnology! :lol:

JakeFarley
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Re: Recoating kite fabric

Postby JakeFarley » Tue Sep 25, 2018 10:18 pm

Sail & Kite looks quite similar to a silica nano coating I spray on my truck, called Permanon. It works pretty good on hard surfaces, but I don't think it would improve the surface characteristics of a kite. I might try it on some ripstop nylon to see if there is any improvement. If I do I'll report the results.

foilholio
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Re: Recoating kite fabric

Postby foilholio » Wed Sep 26, 2018 1:27 am

Many of these spray on products are designed to improve water shedding or repellency . In particular many of the cloth based sprays are designed to also maintain air breathability or flow for wearer comfort. With kites particularly foils you want to prevent airflow. Waterproofing is more of a side effect to a good coating.

I suggest you guys try the coating I used, as it worked very well and is quite cheap.


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