GlassCatalogue_LowRes

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