I am cleaning and re-sealing a wood deck. I have an old half-can of sealant that I would like to use up.

I asked the manufacturer how to find the current product, and they told me this is the one:
Olympic Wood protector waterproofing sealant toner 79002 – Honey gold https://www.olympic.com/products/exterior-stains/olympic-wood-protector-toner
However I am having trouble finding this exact product - Lowes doesn't sell it online anymore, and it's unclear whether they sell it in store. http://m.lowes.com/pd/Olympic-Wood-Protector-Honey-Gold-Toner-Exterior-Stain-Actual-Net-Contents-128-fl-oz/3468547
If I can't find that exact product, how can I determine if something else is compatible with it? And would it be okay to mix the two sealants in a hand-pumped sprayer and then apply it that way?