String

The two outer sections of a staircase where either one or both sides are fix to the adjoining walls


Stripping

Removal of defective areas within a surface coating.


Substrate

Surface which is to be treated.


Suction

Porosity of the surface to be painted.


Suction Feed

Spraying material siphoned into a spray head.


Sugar Soap

An alkaline solution used as a general cleaner in the preparation of a surface


Surface Dry/Touch Dry

The initial setting of a wet film which although still soft can be handled without damage.


Surface Tension

Cohesive strength of a liquid.


Surfacer

Special coatings/primers used to smooth out a surface before painting.


Sweating

Exuding of a liquid on to the surface of a dry coating.