Commercial Sponge Cake Improver? Many years ago (35+) my grandmother received a container of a 'sponge cake improver' from a family member whom was a commercial baker. 
She describes it as looking like a thick amber liquid or paste. 

The method of using it was to put two teaspoons of this improver into a mixer with all the other ingredients, beat on high, and then turn into the cake tin. The result was a high quality sponge, every time. 

I've tried searching for what this product might be called, but turned up short. 

Without resorting to scouring a commercial baking centre - can someone identify what this commercial sponge cake improver would be?
A quick search seems to suggest it's a liquid emulsifier. It's not the most natural of products: a couple of E-numbers and propylenes in there.

http://www.rajfoods.net/cake-improvers.html

Click across to Cake Gel Improvers.