This is a Birchwood Casey Paste known as the Perma Blue, model BC-13322.
Since 1948" serious shooters" avid collectors and professional gunsmiths have relied on Birchwood Casey for shooting and gun care products that have stood the test of time. Birchwood Casey has pioneered innovative products with an unwavering dedication for quality.
Features:
Denser Finish Than Liquid
Provides Even Blue-Black Finish
Non-Streak