ge silicone ii

[James Marco]

I use this stuff all the time. My gear is a bit older than most, I guess. For general seam sealing, a thin coat of three or five to one is a good mix. Too thick and it won't penetrate folds and threads. And, thicker stuff has a tendancy to peel.

As far as peeling goes, if the skin (after drying) has a greater adhesion to itself than the fabric, it will generally peel. A slight loosening of the coating will result in the entire stripe being pulled off, eventually. Theis is often the result from abrasion and rubbing on floors and side walls. This is a pretty clear indicator of too thick of a coating.

Most tents & tarps will start misting after 30 uses or so. Some fabrics, especially the older stuff, are very suseptible to UV damage. This can cause areas to whiten, leak and mist in extreme cases. The new stuff is worse than the older stuff. I think the coating is thinly applied. After using tarps for a few years, I have found that they really only need very thin coatings to restore them…at least till the fabric gets soo weak it starts fraying & tearing easily. I use a 20-50 to 1 mix. This is painted over the whole surface, working it in to the fabric on both sides. This seems to stop any misting and after several years, does not peel nor add significant weight. If done correctly, it will add maybe .1oz or .2oz per yard. It will also reseal seams, but flows easily, not really suitable for initial seam sealing.

The silicone and mineral spirits (or white gas) do not really mix that well. Like Eric was saying, it takes a lot of stirring and rather continuous shaking when applying it. And, it will harden, even when diluted. I had extra and let it sit in my bucket (with a lid) and it still hardened after a few days. Though, it remained relativly oily and far less dense than normal.

Having used both thinners, I prefer the mineral spirits since it has a slower drying time than WG. It is easier to do a large area since it takes a couple minutes to evaporate off.

[Jerry Adams]

I'm pretty sure white gas has smaller Carbon molecules than mineral spirits so white gas is more flamable and more likely to explode. But I agree you should treat both of them carefully.

I've had gasoline disolve plastic tubing, but that was after 24 hours, so okay, probably doesn't matter for brief exposure.

[James Marco]

WG doesn't seem to bother nylon. Nylon is fairly stable and does not disociate like styrene based plastics.

from http://www.merriam-webster.com/dictionary/nylon
nylon
noun (Concise Encyclopedia)

Any synthetic plastic material composed of polyamides of high molecular weight and usually, but not always, manufactured as a fibre. Nylons were developed by Du Pont in the 1930s. The successful production of a useful fibre by chemical synthesis from compounds readily available from air, water, and coal or petroleum stimulated expansion of research on polymers, leading to a rapidly growing family of synthetics. Nylon can be made to form fibres, filaments, bristles, or sheets to be manufactured into yarn, textiles, and cordage, and it can also be formed into molded products. It has high resistance to wear, heat, and chemicals. Most applications are in the form of filaments in such articles as hosiery, parachutes, and outerwear. See also W. H. Carothers.

It is fairly durable and wepons often include parts made from nylon. Oil, and stuff does not disolve this. There are several groups of fibers called "nylon". Some is more resistant than others, but generally WG has no effect on them. Auto-gas is a different story. This has additives than will eventually damage nylon fabric, PET and other synthetics. This is not the same as disolving it, though.

[Jerry Adams]

okay, the only problem with white gas is that it's going to explode, won't disolve your fabric : )

[Patrick O’Neil]

Just got done seam sealing. I think the mix i used was a little thin. Maybe 2-3 tablespoons of ge and 2 fingers of mineral spirits in a pasta jar. The mix didnt harden like people seem to suggest id does. Should i reappyl a second coat with a thicker mix?

[Jerry Adams]

what do you mean "it didn't harden". After 24 hours it should cure, still soft and pliable.

what was the ratio of silicone to mineral spirits?

[Patrick O’Neil]

Sorry i meant the mix itself in the jar did not harden. I shook the silicone and mineral spirits together for about five minutes it turned into a milky liquid. People here seem to suggest their mx hardens in two minutes after shaking. Unfortunately i live in a condo so had to bring all this stuff eleswhere and forgot a measuirng cup. So i eyeballed it, 2 big squirts of silicone and about two fingers of minieral spirits in in a pasta jar. Im leaving it out over nght. I might just reapply in a week.

[Jerry Adams]

After I combine mineral spirits and silicone, it takes about 15 minutes to completely disolve – no little globs of silicone. Maybe if you shake in jar it only takes 5 minutes?

Then apply it to fabric

It takes a few hours to mostly dry, 24 hours for complete cure, better to wait several days before using it

I don't know what you mean about hardening in jar 2 minutes after shaking, in my experience you have maybe even an hour to use it before it starts hardening

[Franco Darioli]

"I'm pretty sure white gas has smaller Carbon molecules than mineral spirits so white gas is more flamable and more likely to explode. But I agree you should treat both of them carefully. "

Reality check…
White gas (Coleman fuel/naphta/Shellite) IS the stuff folk use with liquid fuel stoves, you know the ones where you put a match to them to get them started.
No need to light it nor drink it when mixing with silicone.

Mineral Turpentine/paint thinner is used by painters everyday to both thin pain and clean brushes.
Again somehow millions have managed to do that without setting themselves on fire for well over a century.

[Jerry Adams]

white gas has molecules with fewer carbon atoms – it evaporates more, is more likely to catch fire – it's designed to burn

mineral spirits has molecules with more carbon atoms – it evaporates less, is less likely to catch fire – it's designed to thin paint with less chance of catching fire

mineral spirits is also used as a charcoal lighter where it's supposed to burn, but because it evaporates a little less, it's less likely to catch someone on fire when they're using it

you can use white gas to thin silicone, it's just a little bit more dangerous than mineral spirits

[Dan Yeruski]

Ronson lighter fluid works great for me. Has a nice dispensing spout. User friendly.

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