supplies needed for cushion replacement


Just ordered K66 replacements for my 8 foot table. I am doing everything online because of the covid situation.

So how much contact cement should I order?

3 oz or multiples of 3 oz

1 qt I assume once open the clock is ticking on the glue , how long will it be viable. As I have no plans to use it in the future I guess I hang on to it then trash it.

I plan on using weldwood instead of 3M number 10.