Sika® Polysulphide Gun Grade
Two component polysulphide sealant - Gun Grade
Sika® Polysulphide Gun Grade is a two component Polysulphide sealant. It is used for sealing expansion joints where large movement is anticipated in concrete construction and for joints between diverse construction materials. It is suitable for sealing joints subjected to vehicular traffic and is chemically resistant to water, fuels, oils and solvents.
- Excellent adhesion with most common construction materials
- Resistant to UV and weathering in exposed conditions
- High movement accommodation
Usage
Wherever a permanently flexible seal is required, it is used in horizontal expansion joints in many types of buildings and civil engineering constructions such as
- Precast concrete elements
- Dams, Reservoirs and water treatment plants
- Residential & Commercial buildings
- Subways, bridges, culverts, tunnels
- Rigid pavements of highways, airport runways, aprons, etc
Packaging
Part A | 3.68 kg |
Part B | 0.32 kg |
Part A+B | 4 kg x 2 sets |
Advantages
- Excellent adhesion with most common construction materials
- Resistant to UV and weathering in exposed conditions
- High movement accommodation
- High movement accommodation
- Non-sag in vertical and overhead joints
- Good chemical resistance
- Permanently elastic and forms watertight seal
- Flame and fuel resistant
- Easy to use
- Economical
Colour
Grey Paste
Product Details
APPROVALS / STANDARDS
Conforms to
BS 4254 – 1983
BS 5212 – 1990
IRC : 57-2006
IS : 12118 (Part 1)
JIS K 6820
Chemical Base
Cross linking polysulphide
Shelf Life
12 months from the date of production
Storage Conditions
Store properly in unopened, undamaged and sealed original packaging in cool and dry condition at temperature +5°C to +25°C at a Relative Humidity of 50%
Density
1.6 -1.7 kg/litre at 30°C | (JIS K 6820) |
Shore A Hardness
18 ± 4 | (ASTM D2240) |
Elongation
≥ 450% | (ASTM D 882) |
Elastic Recovery
Before Ageing | > 75% |
After Heat Ageing (70 °C / 14 days) | > 75% |
After fuel immersion (48 hrs) | > 75% |
Movement Capability
± 25% | (IRC : 57-2006) |
Resistance to Fire
Pass (Flame Resistance Test) | (BS 5212-1990) |
Service Temperature
-40°C to + 80 °C
Joint Design
Type of substrate or application | Minimum joint depths |
Metals, glass and other non-porous surfaces. | 5 mm |
Porous surfaces like brick and concrete. | 10 mm |
| Traffickable joints and those subject to hydraulic pressures. | 20 mm |
The product may be applied to joint between 5 to 50 mm wide. Joints subjected to cyclic movements should be designed for an optimum Width/Depth ratio of 2 : 1 (W = 2D).
Application
Mixing Ratio
Part A : Part B, 92 : 8 (by weight)
Sag Flow
Non Sag
Ambient Air Temperature
+5°C min. / +45°C max.
Substrate Temperature
+5°C min. / +45°C max.
Substrate Moisture Content
Dry joint with sound concrete edges. For joints under wet conditions, use Sika® Primer-3.
Pot Life
> 90 minutes at 30°C (500g mix)
Curing Time
For 500 g mix
Skinning Time | ~ 6 hrs at +30°C |
Initial Setting | ~ 24 hrs at +30°C |
Full Cure | ~ 7 days at +30°C |
Tack Free Time
16 ± 0.1 hrs | (BS 5212 – 1990) |
SUBSTRATE PREPARATION
- All surfaces must be clean, dry and free from any loosely adhering particles
- Check the joints edges for soundness and if found weak cut recess and fill up with suitable repair mortar (Consult Sika® Technical services). Correct joint depth can be established by inserting polyethylene based Sika® Backer Material tightly into the joint. When the joints have been filled with fibre filled board, this must be raked back to the required depth. Use bond breaker tape over the backer material. Protect surfaces with masking tape.
- Sika® Primer-3 should be used as a primer only on the two sides.Allow a flash-off time of at least 45 minutes before sealant application (maximum 8 hours).
MIXING
The two components are mixed in the ratio Comp. A : Comp B = 92 : 8 by weight with a low speed mixer (300 – 600 rpm). Mix for approximately 8 – 10 minutes until a smooth, even consistency is achieved.
CLEANING OF TOOLS
Clean all the tools with Solvent immediately after use. Hardened/ Cured material can only be mechanically removed.