USG IMPERIAL Basecoat Plaster User Manual
Page 2
Plastering
I
MPERIAL
Brand Plasters provide a wide range of finish options with three distinct application systems:
1. I
MPERIAL
Brand Finish (one-coat, basecoat plaster is not used)
2. I
MPERIAL
Brand Basecoat with selected plaster finishes (two-coat)*
3. I
MPERIAL
Brand Basecoat MA with selected plaster finishes (two-coat)*
*Note that USG
®
Acoustical Plaster Finish may be applied directly to I
MPERIAL
Brand Basecoat when a sound-rated spray plaster texture
is desired.
I
MPERIAL
Brand Basecoat Plaster (hand-applied
) Scratch-in a tight, thin coat of I
MPERIAL
Brand Basecoat over the
entire area, immediately doubling back with plaster from same batch to the full thickness of 1/16
Љ to 3/32Љ.
Fill all voids and imperfections. Leave the surface rough and open for the proper bond of finish coat. Allow the
basecoat to set and partially dry to provide proper suction for the finish coat.
90%
80%
70%
60%
50%
40%
30%
20%
10%
40
50
60
70
80
90
100
110
°F
4
10
16
21
27
32
38
43
°C
Plaster Drying Conditions
Maximum Temperature
Minimum Relative Humidity
minimum temp.
for plastering
normal drying
no air movement
detectable air
movement
rapid drying
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