Marukyu Tanago Gluten is pretty much the standard bait in Japan for Tanago fishing. Marukyu is the leading producer of baits for all kinds of fish, and powdered gluten is the leading bait used for tanago fishing.
Mixed 1:1 with water, the powder becomes a sticky paste that will stay on the hook. A measuring spoon is included with each container. The gluten contains a garlic scent which supposedly draws tanago from quite a distance (although probably not all the way from Japan - there are no tanago in the US).
I have not yet had a chance to try the Marukyu Tanago Gluten, as it only just arrived and besides, I am convinced that NY and NJ micros spend their winters in Miami. No point micro fishing here when the snow flies.
I have used a paste bait before and have caught black nose dace and creek chubs, so I know that paste baits do work for species other than tanago (at least when the weather is not bone-numbing cold).