SV-998 Polysulphide Sealant for Insulating Glass
Product Description
FEATURES
1.High strength and elasticity
2.Excellent adhesion to glass surfaces and most IG spacer systems
3.Especially suitable for manual application
4.mpermeability to most solvents, oils, and plasticizers
5.Excellent resistance to low and high temperature
6.Neutral and non-corrosive
7.Excellent resistance to low and high temperature
8.Very low water absorption
COLOURS
SIWAY® 998 is available in black, gray, white and other customized colours.
PACKAGING
SV-998 Polysulphide sealant is available as:
Packing 1:Component A:300kgsteel drum Component B:30kgsteel drum
Packing 2:Component A:30ka steel drumComponent B:3ka/plastic pail
BASIC USES
1.The installation of large aquarium adhesive sealing
2.Repair aquarium
3.Glass assembly
TYPICAL PROPERTIES
These values are not intended for use in preparing specifications
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Under the conditions of the 23+2 and the R.H.50+5%
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Item
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Component A
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Component B
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Viscosity(Pa’s)
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100~300
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30~150
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Appearance
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Fine, smooth and homogeneous
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fine, smooth and grease-like
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Color
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White
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Black
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Density(g/em3)
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1.75±0.1
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1.52±0.1
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Mixed Component A and Component B at 10:1 by weight,under the conditions of 23±2℃
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and the R.H. of 50±5%
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Item
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Standard
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Result
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Test method
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Resistance to flow,mm
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Vertical
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≤3
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0.8
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GB/T113477
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level
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No distortion
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No distortion
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Application Time, 30min, s
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≤10
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4.8
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A:B-10:1,Under the conditions of the 23+2℃and the R.H.of 50+5% after 7days of
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curing:
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Item
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Standard
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Result
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Test method
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Durometer hardness
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4h
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30
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GB/T1531
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(Shore A)
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24h
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40
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Tensile strength,MPa
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MPa
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0.8
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GB/T113477
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Permeation rate of evaporation(g/m2.d)
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≤15
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8
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GB/T11037
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GB/T113477
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25HM
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JC/T1 486
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GB/T1Chinese national standard
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STORAGE AND SHELF LIFE
When stored at or below 27℃ in the original unopened containers this product has a shelf life of12 months from the date of production.
HOW TO USE
SV998 Polysulphide sealant is specially designed for insulating glass.
Application
1.Two parts of SIWAY S-998 packaged respectively of composition A(basic gel) and a 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 SIWAY SV-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 bybutterfly-type method as listed in the following figure:
Good Mixture Bad Mixture
3. The surfaces of insulating glasses must be dry and clean.
4.SIWAY SV-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 ioints full of sealant and prevent the gas bubble production due to moving too fast or back and forth in the method ofusing 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.
