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.
FACT: Most nonprescription treatments only treat the pain of cold sores, and provide temporary relief. AbrevaÂ® Cream is the only FDA-approved, nonprescription cold sore medicine that shortens the duration of pain and itch. Cold sores are only contagious when you can see a blister. FACT: A cold sore is contagious from the first tingle until itâs completely healed. Remember to take extra precautions to protect others from encountering the virus. The cold sore virus (HSV-1) cannot spread beyond the lip area. FACT: HSV-1 is a form of the herpes simplex virus that usually affects the lips or mouth, but can spread to the eyes or genitals. Everyone who contracts the cold sore virus will experience an outbreak.