D.Y.I. Freon Recharge Toyota Innova

My air-conditioning lost its cool, I'm suspecting a leak somewhere in my AC system. So I decided to recharge my freon with something with leak sealer and o-ring conditioner mixed in.
Here's where I ordered everything I used in this video:
Freon Recharge tube
s.lazada.com.p...
Freon with Sealant
s.lazada.com.p...