Well about an hour ago I took the bottle with the little bit of silicone/mineral spirits still oozing around in it and added more mineral spirits (totally non scientific without volumes or measurements). After shaking it up really well, I took a piece of the same 1.1oz ripstop weighing 10gm and kneaded it in the concoction for a few minutes. I then squeezed as much fluid off as I could and hung it up. I'll post the change in weight when it dries.
It was easier to soak the material, the entire piece was saturated without having to work the surface with a foam brush and I didn't have to wipe the extra silicone off the surface. I think the final weight will tell me how close it is to premade nysil. If it works out, it will be a vastly superior way to coat the nylon than the thick mixture I used the first time.
I've got a couple of hypotheticals / questions I'd like to pose, if anyone would care to take whacks at em, please do.
1. I'm thinking that the angles of a typical hammock tarp should shed water virtually all water with zero coating.
2. There could be a water problem from capillary action of hanging a nylon tarp over a centerline. Or from water running down the tie offs and creeping in. Are there others I've not thought of?
3. I'm thinking paint roller's width of sil at the center line would kill the action of #2.
4. Has anyone tried this using wax? Waxed cotton used to be the sil of the day. Would nylon absorb it like cotton does?
Last edited by rturtle; 12-19-2011 at 17:04.
I don't have enough experience hanging in the rain to comment about the angle. So far when I have used mine it wasn't pitched real steeply. Water would hang around quite a bit before pooling and running off.
I also hang my tarp under the ridge line with a prussic on each end to move the tarp along the ridge line to where I want it more easily.
On my experiment with the thinner silicone, my scale wasn't sensitive enough to measure the weight gain accurately. It went from 10gm to 11gm, but it needs another decimal of accuracy. I bet it is very close to commercial material.
Here is an example of my first bridge hanging. If I would have hung my tarp about a foot higher it would have been nearly perfect.
Thanks for the input. Just wanted to leave this here. In researching this, I found one of the things the industry uses:
Dow Corning LS 4325 is the solvent based silicone recommended for tents.
Last edited by rturtle; 12-21-2011 at 10:05.
That's true for the solventless Liquid Silicone Rubber. The solvent based stuff might be doable?