ELT-S Additive is a great way to make your ink softer and more stretchable. It was designed for our ELT Series but will work with any plastisol ink. Simply add 10% or 1 pound per gallon.
This is a fantastic product we developed for the ELT Series specifically. If you are trying to replicate the silicone ink feel on a polyester shirt, this will get you very close. Do not expect this to thin your ink as it is a higher viscosity than many clear bases and reducers.