Per Bill Tuthill:
Using McNair's UV Tech instead of 303 on these seals.

Out of curiosity, who told you to use McNair's UV Tech?

Went through the last of my 303 - thought I'd try the McNair
product.

For my money - except for the discoloration which may or may not
be layed to the product - it's somewhat better. Strictly a
subjective judgment, but the rubber feels better when using the
stuff.

Also, McNair's container is reasonably robust. I managed to
break three or four of 303's large spritz bottles and I've never
broken anything like that in my life. Some sort of cheesy
material - extremely brittle.

Having said all that, my seals might disintegrate tomorrow....
--
PeteCresswell