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? How do I minimize air bubbles when pouring Alumisol? Can food coloring be used to color Alumilite casting resins? Can I paint Alumilite? How many parts will I get per mold before the mold starts to break down? Comments 0 comments Article is closed for comments.