KingSeal PU125®
One component polyurethane sealant.
SpecWorld has the Spec Pack, CSI specification and drawings for registered specifiers.
Overview
KingSeal PU125 is a one component polyurethane sealant that cures by reacting with the air humidity to form a tough and highly elastic low modulus sealant. KingSeal PU125 has a very wide service temperature range. Suitable for vertical and horizontal joints.
Where to use
- General sealing of construction joints.
- Water tanks.
- Irrigation channels.
- Basement walls.
- Precast concrete elements.
- For concrete, wood, marble, aluminum, steel, ceramic, gypsum bords, etc.
- Expansion joints in traditional faҁade and construction.
Why use it
- Very easy and economical to use.
- One component.
- Excellent aging resistance.
- Paintable.
- Excellent acoustic properties.
- Remains elastic at temperatures up to -30°C.
- Recommended for under water applications.
- Good resistance to microorganisms and a variety of chemicals.
- Suitable for sealing joints in swimming pools.
- Good adhesion to most surfaces without need of priming.
Technical properties
| Colour | Various |
|---|---|
| Density | Black 1.16 ± 0.05 g/ cm³ Others 1.18 ± 0.05 g/ cm³ |
| Hardness Shore A | 25 |
| Service temperature | -40 up to 80°C |
| Application temperature | 5 up to 35°C |
| Cure rate | 3 mm/ day @ 23°C and 50% HR |
| Elongation at break ISO8339 | > 500% |
| Modulus @100% ISO8339 | Ca 44 psi (0.3 MPa) |
| Resistance to dilute acids and bases | Average |
| Modulus at break ISO37 | Ca 1.6 MPa |
| Compatibility with paints | Excellent with water based paints |
| UV resistance | Good |
| Thermal resistance | Passed 100 days @ 80°C |
| Water and salt spray resistance | Excellent |
Standards and approvals
KingSeal PU125 complies with:
- ISO11600, Type F, Class 25LM.
- ASTM C920.
How to use
Surface preparation
All substrates should be clean, dry, free from dust, oil, grease and any contaminations that could effect the bonding.
If the substrates need to be cleaned, use methyl ethyl ketone (MEK), acetone or grease remover. Always be sure that the substrates are dry before the application.
Priming
- No primer is required for most building substrates, such as glass, aluminum, sound and clean concrete, steel, etc.
- For porous substrate, use a suitable KingKrete sealant primer.
Application
The recommended application temperature range is 5°C to 40°C. For cold weather application, store the product in a heated area at 20°C for 24 hours prior to use. Install polyethylene joint backing rod to control the sealant depth.
Tooling and finishing should be carried out immediately after the application of the sealant. For optimum performance, the ratio of width to depth of the sealant should be 2:1. Minimum sealant depth should however be 10 mm.
Cleaning
Clean tools and equipment first with paper towels and then wipe by using Acetone, xylene or other suitable solvents.
Limitations and notes
- Not recommended for unsound substrates.
- Although KingSeal PU125 is generally paintable, it is recommended test for the specific paint compatibility.
- Long exposure to UV, will reduce surface gloss, but will not affect sealant performance.
Coverage, packaging and storage
Packaging
KingSeal PU125 is available in 600 cc sausages. 300 ml sausages and 300 ml cartridges are available on request.
CONSUMPTION IN JOINTS
(Linear meter per 600 cc sausage)
| Width /Depth | 5 mm | 10 mm | 15 mm | 20 mm | 25 mm |
|---|---|---|---|---|---|
| 5 mm | 24 | 12 | |||
| 10 mm | 4 | 3 | 2.4 | ||
| 15 mm | 1.6 | ||||
Storage
Shelf life is 1 year when stored under cover, out of direct sunlight and protected from extremes of temperature.
Failure to comply with the recommended storage conditions may result in premature deterioration of the product or packaging. For specific storage advice consult KingKrete's Technical Services Department.
Health and safety
As with all chemical products, care should be taken during use and storage to avoid contact with eyes, mouth, skin and foodstuffs. Treat splashes to eyes and skin immediately. If accidentally ingested, seek medical attention. Reseal containers after use. Use in well ventilated areas and avoid inhalation.