IOTA 998 Silicone Weatherproofing Sealant
1. weatherproofing joint
seal for the curtain wall
2. ±25% movement capacity
PRODUCT
FEATURES
1.Good
weatherability, virtually unaffected by sunlight, rain, snow and ozone
2.Neutral cure-suitable
for use on metals, coated glass, aluminum panels, terracotta panels,
concrete materials, galvanized steel and many other substrates.
3.Extension/compression
movement capability of up to ±25 percent of the original joint width
4.Good resistance to
temperature extremes, stable and flexible over the temperature range from –50
to +150 ℃
5.Good unprimed
adhesion to a wide variety of building materials
6. Easy of
application-ready to use as supplied
7. Good
compatibility with other neutral silicone sealants
COLOURS
IOTA 998 is available in
black, gray, white and other customized colours.
PACKAGING
IOTA 998 is available in
disposable cartridges (net 300ml) and sausages (net 590ml)
Typical properties:
These
values are not intended for preparing specifications.
Test Method
|
Property
|
Unit
|
Standard
|
Result
|
GB/T 13477 (ISO 7390)
|
Slump
|
mm
|
≤3
≤3
|
0
0
|
GB/T 13477 (ISO 8394)
|
Extrusion rate
|
ml/min
|
≥80
|
856
192
|
GB/T 13477(ASTM D 2377)
|
Tack free time
|
h
|
≤3
|
1.1
|
GB/T 13477 (ISO 7389)
|
Extension recovery
|
%
|
≥80
|
97
|
GB 16776 (ISO 10563)
|
Weight loss
|
%
|
≤10
|
5.6
|
GB/T 13477 (ISO 8339)
|
Modulus at 23℃
|
MPa
|
>0.4
|
0.84
|
GB/T 13477 (ISO 11600)
|
Movement capability
|
%
|
±25
|
±25
|
GB/T 13477
|
Extension/compression
rate
|
%
|
±25
|
±25
|
GB/T 13477
|
Adhesion at fixed
stretch
|
|
No failure
|
No failure
|
GB/T 13477
|
Adhesion after heat
contract and cold extension
|
|
No failure
|
No failure
|
GB/T 13477
|
Adhesion after UV-water
exposure
|
|
No failure
|
No failure
|
STORAGE AND SHELF LIFE
IOTA 998 should be stored
at or below 27℃ in original unopened
containers. It has a shelf life of 12 months from the date of manufacture.
LIMITATIONS
IOTA 998 should not be
applied:
As
structural sealant;
To
the materials that bleed oils , plasticizers or solvents, such as impregnated
wood, oil-based caulks;
In
totally confined spaces as sealant requires atmospheric moisture for cure;
To
frost laden or damp surfaces;
For
continuous water immersion;
When
substrate surface temperature below 4℃
or over 50℃ to copper, zinc or lead
coated surfaces.