Question about Mounting the Primary

My primary mirror (13.1-inch) has come loose from the mirror cell. It was attached with a silicon-based product. The product looked like typical silicon caulk from a tube, but I'm not sure just what the product is. The mirror was already mounted when I bought the telescope used. My question - is there any difference from silicon caulk I can buy at Lowe's from the material used on an aquarium or do I need to order special material or find a fish store that has the material.

In other words, can I just use silicon caulk to reattach my mirror.

Thanks

david roberts

Yes, you can find pure silicone caulk in most any home center like Home Depot or Lowe's. Just check to make sure it says 100% silicone sealant. I'm holding a tube from GE called "Silicone II" that I bought from a retail supercenter that had a home decorating section.

Lee