Can I buy just one side of Alumilite or just catalyst for the rubber? Monica P. November 05, 2020 20:13 Updated Yes. We typically stock extra catalysts for the silicone however if it is not in stock, expect a lead time of 5-10 days. Related articles Do you ship your products internationally? What factors contribute to shrinkage in molding & casting parts? Can I buy just one side of Alumilite or just catalyst for the rubber? How do I minimize air bubbles when pouring Alumisol? Can food coloring be used to color Alumilite casting resins? Comments 0 comments Article is closed for comments.