This is a very common question on this forum, it has been asked dozens of times in the past couple of years. There is no way to visually determine if a given building product contains asbestos. The only way to make the determination is to take a sample of the product to a laboratory and have it tested. The standard test requires a special microscope, so is beyond the ability of an untrained individual to determine. There is also no way to positively rule out any specific building product, regardless of age, since asbestos has been incorporated in an astonishing variety of products (all the way from brake pads to pipe insulation), and contrary to public belief is still sold today (Canada is a leader in the production of asbestos).