Spiral Wound gaskets can be fabricated of any metal which is available in thin strip and which can be welded; therefore they can be used against virtually any corrosive medium dependent upon the choice of the metal and filler.
Theoretically, it is no longer contagious when there is no more fluid leaking from the sore, and no new blisters are forming. However, I always assume that a cold sore is contagious until it is completely healed, and to the best of my knowledge I've never transmitted the virus to anyone else. Abreva is a very good remedy. If applied when you first feel the tingle you can actually prevent the cold sore from erupting into blisters.
How long am I contagious if I have the stomach flu? You can be contagious from a few days up to two weeks or more, depending on which virus is causing your stomach flu (gastroenteritis). Although you typically feel better after a day or two, you're contagious for up to three days after you've recovered. 2  Some people may be contagious for up to two weeks after recovery. 3  Rotavirus.