Surface Preparation第 2 / 100 题
What is the primary purpose of caulking gaps around window trim before painting?
a.To add color contrast to the trim
b.To increase the paint's gloss level
c.To seal joints against water and air infiltration and create a smooth line
d.To speed up the drying time of the topcoat
解析
Caulk seals the joint between dissimilar materials such as trim and siding, keeping water and air out and preventing paint from cracking at the gap. A properly tooled caulk bead also gives a clean, continuous paint line. Paintable acrylic-latex caulk is typically used before priming or painting.
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