Can I buy just one side of Alumilite or just catalyst for the rubber? Monica P. November 05, 2020 20:28 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 What is the shelf life of silicone moldmaking rubbers? How do I polish clear resins? Do you ship your products internationally? What is the shelf life of silicone moldmaking rubbers? How long does it take Performance 80D to fully cure such that the data sheet specifications can be expected. I see that demold time is 1 to 2 hours, but how long until full strength is obtained? Comments 0 comments Article is closed for comments.