First, the specific reasons are:
(1 ) sealing material aging.
(2 ) sealing materials selection of improper .
(3 ) design and construction of does not take into account the substrate the nature of does not according to the substrate surface the nature of change substrate the necessary processing , resulting in bonding defects. (4 ) design or construction is unreasonable , resulting in wallDeformation is too large , the packing material the substrate from .
Second, the repair steps:
(1 ) should first determine whether the for the design and structure is irrational resulting in leakage . If so, should first clear the wall structure is unreasonable stress.
(2 ) of the original wall surface material for analysis.
(3 ) Select supporting the sealing material and the base processing agents , and the curtain wall sealing adhesive index test, the indicators should meet the national standard.
(4 ) remove curtain wall the existing sealing material .
(5 ) by sandpaper and cleaning agents to to be sealed area clean the .
( 6) anti-fouling surface protection tape affixed to the the sealed area sides of .
(7 ) in the sealed parts of surface brushing the base treatment agent .
(8 ) to adjust the glue gun bore , the sealing material embedded in sealing parts , and with a scraper finishing the surface .
(9 ) exposed In addition to anti-fouling surface protection tape .
(10 ) well curing during finished protected .
(11 ) quality inspection.

Author: Jiande Tongyu Electrical Tools Factory
Website: www.tygluegun.com
Main Products: glue gun?glue stick