Weatherproof Silicon Sealant
POWER Weatherproof Silicone sealant is a one-part, neutral-cure, architectural grade sealant specifically designed for general glazing and
weather sealing in curtain wall and building facade. It easily extrudes in a wide rang weather condition and quickly cures at room temperature by reaction with moisture in the air to form a excellent , durable, flexible silicone rubber seal.

Characteristic
a. Can be easily used and extruded any time.
b. Neutral cure-suitable for use on most construction materials.
c. Excellent adhesion to most construction materials without the primmer.

d. Excellent weather ability, virtually unaffected by sunlight, rain, snow, ozone or temperature extremes. e. Low modulus sealant.
f. Extension/compression movement capability of up to 50% of the original joint width.

Where to use
POWER is especially designed for general glazing and weather sealing in curtain wall and building facades. It is suitable for glazing weatherproofing movement joint and sealing the joints of the non-structural curtain wall. It can form a waterproofing sealed layer to many kinds of glasses, coated aluminum, decorative metal board, tile, and granite without primmer.

Use limitations
POWER silicone Weatherproofing sealant is not fit for structural usage. It should NOT be applied in the following conditions:
a. To building materials that bleed oils, plasticizers or solvents and green or partially sulfur zed gaskets or tapes, etc.
b. In totally confined spaces (Silicon sealant need the water in the air to cure)
c. For continuous inversion in water or below-grade applications all the year
d. To painted surfaces, may cause seal failure as the paint cracking or paint stripping
e. To frost-laden or wet surfaces
f. Surface touch the food directly
g. Easily suffer mechanical wear
h. Fireproofing seal system

Typical properties (for reference)
The following data is for reference, is not suggested to make standard.

Test at 50¡À5% RH and temperature 23¡À2¡æ 

1

Appearance

Have no grain, no agglomerations,1

Pass the standard

 

2

Resistance to flow ,
mm

Vertical

¡Ü3

0

GB/T113477.6-2002

Level

No distortion

No distortion

3

Tack Free Time, h

¡Ü3

1.0

GB/T113477.5-2002

4

Extrusion ability, ml/min

¡Ý80

170

 

5

Tensile modulus
 Mpa

23¡æ

> 0.4
or
> 0.6

0.5

 

 -20¡æ

 

6

Curing time at 50¡À5% RH and temperature 23¡À2¡æ,days

7-14

7-14

 

As Cured ¨CAfter 21days at 50¡À5% RH and temperature 23¡À2¡æ:

7

Durometer Hardness,(Shore A), points

 

28

GB/T1531-1999

8

Tensile strength at 25% elongation, Mpa

 

0.2

GB/T113477.8-2002

9

Tensile strength at 50% elongation, Mpa

 

0.35

GB/T113477.8-2002

10

Tensile at 100% Elongation

 

no break

GB/T113477.8-2002

11

Ultimate elongation % at break£¬%

 

350-400

GB/T113477.8-2002

12

Sealant Class

 

25LM

ISO 11600 or JC/T881-884-2001

13

Density, g/cm3

 

1.35

 

Material feature
POWER Silicone Weatherproof sealant can keep good viscous degree and can easily extruded at -25¡æ to 50¡æ; Can keep good flexibility at  -50¡æ to 150¡æ after cured. It is unaffected by UV ray, rain, ice, snow, air pollution, ozone and high or low temperature. Even under the severe weather conditions, it can maintain excellent weatherproofing and waterproofing properties for some years, POWER has an excellent compatibility with reflect glass, doubling glass, silicone hollow glass, acrylic acid, polythene and etc.

Specifications
JC/T881-884-2001 25LM;    GB/T 14683-2003  25LM;
ISO11600F&G class 25LM; ASTMC 920NS model 25 grade;
BS5889 A&B model; DIN 18545  NFgrade.

Colors
POWER weatherproof silicone sealant is available 4 standard colors: white, black, grey, brown. We can also supply the other color according to the customer¡¯s requirement.

Packing
It is available in 300ml plastic cartridges, 24 cartridges/ carton.
 or 500ml aluminum sausages,20 sausages /carton.

Storage and usable life

It has a useable life of 12 months from the produced date when stored under dry and airy,27¡æ or lower temperature conditions in the original unopened container.