Which of the following is used as curtain-wall sealants?
A. Polyurethane
B. Silicones
C. Polyvinyls
D. Cellulose derivatives
Answer:B
Which of the following is used as curtain-wall sealants?
A. Polyurethane B. Silicones C. Polyvinyls D. Cellulose derivatives
Explanation: Although expensive, silicones are used as curtain-wall sealants because of their excellent aging characteristics.