Actually, it's not that much different than Amsteel Blue. They're made by different companies, but with almost identical material.

But the method to splice amsteel blue is the same as it is for masterpull.

If you don't want an answer to your question, why even bother to ask? Why not start off with, "What should I do with this extra 25' of synthetic rope", instead of, "Splicing Synthetic Rope - know How?".