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Hermetic seal. A hermetic seal is any type of sealing that makes a given object airtight (preventing the passage of air, oxygen, or other gases). The term originally applied to airtight glass containers, but as technology advanced it applied to a larger category of materials, including rubber and plastics.
Compression seal fitting. In mechanical engineering, a compression seal fitting, also known as a sealing gland, is intended to seal some type of element (probe, wire, conductor, pipe, tube, fiber-optic cable, etc.) when the element must pass through a pressure or environmental boundary. [1] A compression seal fitting may serve several purposes:
Some seals and gaskets. 1. o-ring. 2. fiber washer. 3. paper gasket. 4. cylinder head gasket. A gasket is a mechanical seal which fills the space between two or more mating surfaces, generally to prevent leakage from or into the joined objects while under compression. It is a deformable material that is used to create a static seal and maintain ...
RTV silicones are made from a mixtures of silicone polymers, fillers, and organoreactive silane catalysts. Silicones are formed from a Si–O bond, but can have a wide variety of side chains. [3] The silicone polymers are often made by reacting dimethyl dichlorosilane with water. [4] Linear dimethylpolysiloxane polymer reaction.
A s urgical sealant film is an implantable medical device used during surgery. It is a preformed flexible patch that is applied to supplement sutures and surgical staples to seal tissues and prevent leaks of fluid (including blood and cerebrospinal fluid) and air. The sealant film is synthetic and incorporates absorbable polymers, including ...
Seal (mechanical) A seal is a device or material that helps join systems, mechanisms or other materials together by preventing leakage (e.g. in a pumping system), containing pressure, or excluding contamination. The effectiveness of a seal is dependent on adhesion in the case of sealants and compression in the case of gaskets.
EPDM rubber. EPDM rubber (ethylene propylene diene monomer rubber) [1][2][3] is a type of synthetic rubber that is used in many applications. EPDM is an M-Class rubber under ASTM standard D-1418; the M class comprises elastomers with a saturated polyethylene chain (the M deriving from the more correct term polymethylene).
Sealant. Self-leveling silicone firestop system used around pipe through-penetration in a two-hour fire-resistance rated concrete floor assembly. Sealant is a substance used to block the passage of fluids through openings in materials, [1] a type of mechanical seal. In building construction sealant is sometimes synonymous with caulk (especially ...