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101 - 17 Ave. SW, Calgary, AB View Location

Office Hours: Monday to Friday 8:00 am - 5:00 pm

PP

PSF

Pounds per square foot (lbs/ft2). Abbreviation of pressure notation, used to describe wind velocity, barometric pressure.

PRIMING

Sealing of a porous surface so that compound will not stain, lose elasticity, shrink excessively, etc., because of loss of oils or vehicle into the surface. Frequently the sign of inferior formulation when compound requires priming of surface before application.

PRIMER

A special coating designed to enhance the adhesion of sealant systems to certain surfaces or a final organic coating to a surface.

PRIME WINDOW

A window which is installed during the initial construction and services as an integral part of the structure. Not to be confused with storm windows which serve as a secondary weathering device.

POLYURETHANE

A synthetic rubber formed by the reaction of a glycol with an isocyanate. When used in sealants, yields a rubber-like material with excellent strength characteristics. Used as exterior sealant and sealed insulating glass sealant.

POLYMERIZED

Treated by heating or cooking so that molecules of different substances unite into larger molecules of a different substance with individual characteristics.

POLYMER

A material which has been polymerized from smaller molecules into longer molecules or chains. This can be done by addition or condensation reaction.

POLYBUTENE

A light colored liquid, straight chain aliphatic hydrocarbon polymer. Non-drying and widely used as a major component in sealing and caulking compounds. It is essentially non-reactive and inert.

PLATE GLASS

Polished plate glass is a rolled, ground and polished product with true flat parallel plane surfaces affording excellent vision. It has less surface polish than sheet glass and is available in thickness varying from 1/4″ to 1-1/4″. Now replaced by float glass.

PICTURE WINDOW

The picture window is stationary and framed so that it is usually, but not always, longer horizontally than vertically to provide a panoramic view.