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Glossary Of Terms / S

Glossary Of Terms / S Shear The back and forth or lateral sliding action two surfaces exert on the sealant. Sheet glass A transparent glass obtained by drawing glass from a furnace. Sheet glass has natural fire finished surfaces, but because the two surfaces are never perfectly flat and parallel there is always distortion of vision and reflection. Shelf life The length of time a product may be stored before losing its effectiveness. Shims (see spacers) Similar to a chip, but often larger and occurring on the face opposite to the score mark. Shopfront glazing Glass and glazing systems for the display of products. Shore A hardness Measure of firmness of a compound with the Shore A Standard test for sealant hardness based on a scale of 1 to 100, by means of a Durometer Hardness Gauge. Shore durometer system A durometer measures the hardness of a material by measuring the depth of an indentation made when a set amount of pressure is applied. Shrinkage Shrinking over time. Side panel A panel located next to a doorway. Sight line The line along the perimeter of the glazed panel corresponding to the edge of stationary or removable bead. The line to which sealants contacting the glazed panel are sometimes finished off. It tends to be the daylight size. Silica Is the compound silicon dioxide which occurs naturally. Sand is a form of silica and is used to make glass. Silica is the main component of glass. Silica gel An adsorbent. An amorphous porous form of silica dioxide having a large internal surface area and range of pore sizes. Silicone rubber A synthetic rubber based on silicone, carbon, oxygen, and hydrogen. Silicone rubbers are used widely as sealants and coatings. Silicone sealant A type of glazing compound made from silicone material which is gunned into position and cures to an elastic solid. 246 Product Catalogue For Glass Processors & IG Manufacturers

Glossary Of Terms / S Sill The bottom horizontal member of the window/door frame. Silvering The application by chemical or other methods of a film of silver to a glass surface to create mirrors. Sloped glazing Any installation of glass that is sloped more than 15° from the vertical. Where sloped glazing is over areas that can be walked under it is referred to as overhead glazing in standards. Slump glass Glass that has been heated until it slumps into a mould. This can be used to give curved glass or patterned glass. Soda lime silicate glass Ordinary window glass, including float, patterned glass and wired glass. Soft coats Coats applied to glass after the glass has come off the float line. The coating is softer and less durable than hard coats. Solar control glass Tinted and/or coated glass that reduces the amount of solar heat passing through it. Solar energy Solar energy is the term used in the glazing industry to describe the energy spectrum radiated directly from the sun which passes through our atmosphere and arrives at the earth’s surface. It refers to ultraviolet, visible and near-infrared radiation, each part of the energy spectrum referred to by their waveband nomination. For the glazing industry solar energy is specified as the energy waveband from 300nm to 2500nm. The intensity of solar energy at the earth’s surface is dependent upon the latitude of the building location and averaged environmental conditions. Solar energy reflectance The percentage of solar energy of the solar spectrum that is reflected from the glass surfaces. Includes UV, light and heat. Solar energy transmittance The percentage of solar energy within the solar spectrum that is transmitted through the glass. Includes UV, light and heat. Solar heat gain coefficient The ratio of directly transmitted and absorbed solar energy that enters into the building’s interior. Solar heat gain includes directly transmitted solar heat and absorbed solar radiation which is then re-radiated inward. Email: | Web: 247