Optical gel is 2-part epoxy
NSN 6645-00-155-2398
NSN 5998-01-561-0292
NSN 5990-01-269-2111
NSN 5930-00-990-7568
NSN 6620-00-127-0816
NSN 5905-00-902-8138
NSN 5960-00-866-9660
NSN 5998-01-269-6459
NSN 2925-01-523-3607
NSN 7035-00-020-2227
NSN 5960-01-654-4353
NSN 5990-01-537-4815