Description
It is a kind of two-part room temperature vulcanized polysulphide
sealant with high performance especially formulated for insulating
glass. This sealant has excellent elasticity, heat gas penetration
and adherent stability to various glasses.
Insulating glass is a kind of energy-efficient material with
various functions of soundproof, heat-resistant, anti-frost, and
anti-fume, etc. It is widely used as the wind shields in
construction, trains automobiles and the door glasses in
refrigerators and freezing cabins.
The property of ZJ-998 is certificated by JC/T 486
-2001standardelastic sealant for insulating glass.
The product manufactured by ZHIJIANG ZJ-998 is certificated by
GB/T11944-2002 standard - Insulating glass.
Where to use
ZJ-998 Polysulphide sealant is specially designed for insulating
glass.
Application
1. Two parts of ZHIJIANG ZJ-998 packaged respectively of
composition A (basic gel) and composition B (curing agent), are
mixed together according to the ratio of A: B=10: 1 before
application. The curing rate may be modulated by changing the
weight ratio of composition A to composition B over the range of
12:1 to 8:1 according to different environment conditions.
2. The mixture of sealant can be classified into two methods, one
by hand-made and the other by special extrusion machine. It is
noticed that ZHIJIANG ZJ-998 sealant should be scratched and mixed
by the spatula along the same direction repeatedly to prevent gas
bubble trapped in sealant in the method of hand-made. The
homogeneity of mixture can be measured by butterfly-type method as
listed in the following figure:
3. The surfaces of insulating glasses must be dry and clean.
4. ZHIJIANG ZJ-998 should fill the joints completely which need to
be caulked during the course of making insulating glass.
5. Gun mouth should be assured to move along the same direction at
uniform velocity to make the joints full of sealant and prevent the
gas bubble production due to moving too fast or back and forth in
the method of using special extrusion machine.
6. The sealant overflowing the joints should be pressed back at
once by spatula to make the sealant contacting with the sides of
the joints completely and smooth the surface of the joints along
the same direction.
Main Technical Properties (Only for Reference)
Under the conditions of the 232 and the R.H. 505% |
Item | Component A | Component B |
Viscosity(Pa's) | 4000 | 800 |
Appearance | Fine, smooth and homogeneous | fine, smooth and grease-like |
Color | White | Black |
Density(g/em3) | 1.750.1 | 1.520.1 |
Mixed Component A and Component B at 10:1 by weight, under the
conditions of 232and the R.H. of 505% |
Item | Standard | Result | Test method |
Resistance to flow, mm | Vertical | 3 | 0.8 | GB/T113477 |
Level | No distortion | No distortion |
Application Time, 30min ,S | 10 | 4.8 | |
A:B=10:1, Under the conditions of the 232and the R.H. of 505%, after 7days of curing: |
Item | Standard | Result | Test method |
Durometer hardness (Shore A) | | 45 | GB/T1531 |
Tensile strength , MPa | MPa | 0.8 | GB/T113477 |
Permeation rate of evaporation (g/m2.d) | 15 | 8 | GB/T11037 |
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