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Is Lexel a superior alternative to silicone?

Lexel product closeup and review with no coupon for any discount

I got this tube of Lexel for the 5 gallon bucket solar hot water experiment thinking that the extra cost would be worth it if it was indeed a "superior alternative" to silicone.

The main problem I had with it was the amount of time it takes to dry. Expect to wait 1 to 2 days for it to cure and 1 to 2 weeks before you reach "total firmness".

Lexel might be the better choice if you need some extra elasticity, but I like a good old fashioned tube of silicone that can be expected to dry and be ready to use within hours depending on temperature and humidity.

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According to their own MSDS:

  • 33% naphta (CAS 64742-89-8, which is carcinogenic and mutagenic)
  • 9% toluene (CAS 108-88-3, which is flammable, an irritant and can cause damage to the unborn child)

Pretty much all of this will evaporate or leach out over time.

Better wear a half-mask respirator with activated carbon filters when using this indoors.

Comment by Roland_Smith Thu Apr 28 01:26:00 2011
We should clearly stick to silicon!
Comment by anna Thu Apr 28 07:23:44 2011

Silicone is pretty much harmless. Even the two component versions often don't have to be labelled as chemicals.

(silicones are also employed in non-stick cookware)

Comment by Roland_Smith Thu Apr 28 16:54:36 2011
It's very good to hear that silicone is so safe. Mark uses it a lot!
Comment by anna Thu Apr 28 17:43:08 2011

One very unique homestead, $1,500 per acre, the opportunity of a lifetime