Polyactic Acid (the primary ingredient in "Powerfill") is a bioplastic obtained from lactic acid according to my initial web searches.
There is a world of experimental fillers in regions that are too distant linguistically for adequate translations (Korea, China, Russia, etc) to keep up with, and quite frankly, I've never heard anything positive from what few reports I've seen (and I'm including progress reports as well as physician's opinions).
That doesn't mean we shouldn't learn about them, heck PMMA for penile use was being used in foreign (non-English speaking like Brazil & Mexico) countries before gaining popularity with American & European men. - that said, due to the considerably larger linguistic & geographical gap involved in examining these alternatives, much greater scrutiny is needed.
If anyone does have experience with this filler do chime in, and any Biochemist or Medical professional familiar with said-filler should also chime in. Personally, if there is no apparent advantage with this filler and its only promise is a temporary 2-3 years, why not instead just have Ellanse? It's already approved for us in Europe and Mexico, and is in trials with the FDA with eventual approval in the U.S. I mean at least until much more is known about said-filler. My 2 cents. .
There are some Korean articles on using Poly lactic acid for PE but I have not been able to source free copies of them. It was the filler I very first considered using for PE. It is usually just diluted in saline (water) rather than a carrier filler like Ellanse. That would make it very easy to inject but less controllable as to where it ended up. Usually we dilute 1 ampule in 7 - 10 ml. Maybe you want 5 ampules to make a good difference, dont know.