APPLICATION FIELD
- Secondary sealant for the manufacturing of insulating glass.
- Two component, room temperature cured polysulfide sealant.
- Excellent adhesion to most building materials such as glass, aluminum alloy, and galvanized-steel, stainless steel etc.
- Solvent free, primers are not required.
- High strength and elasticity.
♦ APPLICABLE STANDARDS
- EU Specification: EN1279-part2, 3,4
- China Specification: GB/T 29755
- IGCC-IGMA Approved.
♦ TECHNICAL DATA - TYPICAL PROPERTIES
| TEST ITEMS |
TEST RESULTS |
| COLOR |
Component A (base) White______
Component B (catalyst) Black______
Mixture (A+B): Black |
MIXING RATIO
POT LIFE (23°C) |
10:1(by weight)
20 min. Pot life is influenced by room conditions. |
| HARDING TIME |
2-3 hrs, depending from pot life. |
| DENSITY |
Com A[23°C] approx. 1.80 [g/cm3]
Com B [23°C] approx. 1.55 [g/cm3] |
| VISCOSITY |
Com A [23°C] 490 Pa.s
ComB[23°C] 120 Pa.s |
| FINAL HARDNESS(ShoreA) |
45 [Shore A] |
MOISTURE VAPOUR TRANSMISSION (MVTR) 11 gr/m2.24hrs.2mm EN 1279/4
| GAS PERMEATION(Ar) |
6.63 x 10-3 [gr/m2.hrs] EN 1279/4 |
TENSILE ADHESION STRENGTH approx. 0.70 [MPa]
| VOLATILE CONTENT(A+B) |
<1.0% |
| FOGGING |
Without visual fogging |
Test Condition: As cured after 14 days at Temperature 23°C and 50% R.H.
♦ MIXING AND DISPENSING INSTRUCTIONS
SILANDE MF840 has to be mixed homogeneously and air-bubble free in the correct ratio.
SILANDE MF840 should be mixed in a ratio of 10:1 base to curing agent by weight, or equivalent 8.6:1 by volume for optimal properties. At this mix ratio, the sealant typically exhibits a working time of 20-30 mins and allows units to be handled within 6~8 hours. Slight variations in mixing ratio can be tolerated, but these should not exceed 100:6 to 100:12 by weight to ensure minimum properties are obtained.
Mixing Ratio by Wight 100:6 100:8 100:10 100:12
Mixing Ratio by Volume 14.3:1 10.7:1 8.6:1 7.1:1
.CURING
When mixing SILANDE MF840Abase + SILANDE MF840 B catalyst at approximately a 10:1 weight ratio, the material will become tack-free at about 25-35 mins under ambient conditions of at 23°C, 50% R.H. After 3 days IGU can be transport to project, Development of full properties requires full evaporation of cure by-products and will normally be achieved within 5 days (can be start for installation). Full properties will take additional time in colder climates.
It is important when selecting components for a project that adhesion and compatibility tests are carried out, and found to be successful, before the project starts.
.SHELF LIFE AND STORAGE
12 months from the date of production below 30°C.
♦ PACKAGING
Com A190 L/drum Com A 30 kg/pail Com A4 kg/pail
Com B 19 L/pail Com B 3.6 kg/pail Com B 0.48 kg/bag
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