Excuse my thickness, but do the amounts have to be accurately measured or is it a bit of this and a dash of that? What I’m getting at is that I can get ammonia/water mix due to me working on refrigeration systems, but it’s hit and miss as to what strength the mix would be. Plus I can get neat glycol too and I think there is a jar of glycerine in the cupboard. Interesting this thread, just need to find some latex now.