Don't use it.   Just don't.  Don't take the chance.

 

A couple years ago I though to use up some tubes  I'd had laying around.

The stuff went on OK filled the gaps and  stopped water BUT NEVER CURED~!!!!! So it is nasty goo.

Mineral spirits doesn't touch it, it laughs at alcohol  and acetone. water based cleaners are useless.

 

I have discovered how to clean the goo off.

Lots of xylene ( as in you are going to use a whole pint on a small space of maybe 20 sq inches)  then a strong solution of TXP and Dawn detergent followed by  409  all scrubbed with brushes and terry towels,  then hosed off.

 

 

 

Edited March 30, 20179 yr by Cliff

Thanks for the warning and the solution!

Plus 1...couldn't find the + key...

2 hours ago, Cliff said:

Don't use it.   Just don't.  Don't take the chance.

I'm with you there, Cliff! BTDT, but never discovered how to clean up the mess. Tossed whatever I was trying to fix.

John

Was this stuff in a metal or cardboard tube?  

 

The only problem i ever had with silicone rubber (the kind that smells like strong acetic acid) was that it hardened in the tubes which had never been opened.   When i cut them open the silicone rubber had hardened into a giant blob of rubber.

Never done it, but I've thought about cutting them into cookies for use around the shop. 

10 hours ago, p_toad said:

Was this stuff in a metal or cardboard tube?  

 

The only problem i ever had with silicone rubber (the kind that smells like strong acetic acid) was that it hardened in the tubes which had never been opened.   When i cut them open the silicone rubber had hardened into a giant blob of rubber.

The one I had that problem with was in the plastic squeeze tube. I've also had the cardboard caulking tubes go hard, either opened or un-opened. Could have been a different manufacturer.

John

I guess if you are not sure if it is still good, squirt some on a piece of scrap and see if it hardens/cures

Edited March 31, 20179 yr by Chips N Dust