Scott, I've used a product called Flat Attack (flatattack.com) in tubulars for years. Works great, environmentally friendly, lasts indefinitely. Sold it and used it in my shops, never a problem. Even used it in a car tire once to get home, with typically positive results.
Greg Overton near Denver, CO
Quoting scott davis <francopedia@yahoo.com>:
>
> Can anyone offer some tire sealant opinions. I have a couple of
> dead 80s Italian Clement Criteriums w/ replaceable valves. I'm not
> sure if tubes are natural rubber or latex. I'll be riding them--No
> Show, Just Go!
>
> Scott Davis St. Anthony, Minnesota USA