that the manufacturers were not in the chain of distribution of the asbestos insulating products and therefore had no duty to warn of the danger of exposure to asbestos during servicing, and it makes no difference whether the manufacturers knew that their products would be used in conjunction with asbestos insulation.
In contrast, these respirators were complete upon sale and did not require the addition of an asbestos-containing component. Moreover, these respirators were intended to protect against a number of different contaminants, including welding fumes, paint fumes, and various types of dust. The manufacturers should not be expected to warn of the dangers of every contaminant a user could conceivably encounter. Imposing such an obligation would render all the warnings given virtually meaningless.