Thanks a lot!

Does this look like it's good then?

I ordered this on Amazon and it worked well

Sodium Hydroxide - Pure - Food Grade (Caustic Soda, Lye) (1 Pound Jar) https://www.amazon.com/dp/B0875LR274/ref=cm_sw_r_cp_api_i_V3QKX3VB23G22PX6XB2B?_encoding=UTF8&psc=1

This one on Amazon