As a diabetic, I have a few things (insulin infusion canula, continuous glucose monitor) that attach to skin with adhesive. In principle, you could use medical tape around the edges of a normal mask, and it would improve the seal. I think the reason people don’t do this is because it’s a lot of effort to put on (effort which could be spent improving the fit in other ways), and it’s physically painful to take off. This limits its usefulness to the range where an imperfectly-fitted N95 isn’t good enough, but a positive-pressure suite isn’t necessary; I’m not sure situations in that range are at all common.
As a diabetic, I have a few things (insulin infusion canula, continuous glucose monitor) that attach to skin with adhesive. In principle, you could use medical tape around the edges of a normal mask, and it would improve the seal. I think the reason people don’t do this is because it’s a lot of effort to put on (effort which could be spent improving the fit in other ways), and it’s physically painful to take off. This limits its usefulness to the range where an imperfectly-fitted N95 isn’t good enough, but a positive-pressure suite isn’t necessary; I’m not sure situations in that range are at all common.