Don't do it !!!!!! OH MY GOD YOU WILL DIE !!!!!
That was the fun part, now seriously.
Would you eat something that had such an expiring date.
Well I certainly would if it looked, smelled and tasted OK.
An expiring date does not mean that the goods are spoiled immediately after that day. They are just guidelines. And a manufacturer can not guarantee that the goods will be OK after that day. So they likely are but no guarantee.
So back to the kit.
Why not give it a try. You have nothing to loose.
Luc