KingSeal PU155®
One-component, low-modulus, non-sag elastomeric polyurethane joint sealant.
Overview
KingSeal PU155 is a one-component, solvent-free, non-sag polyurethane sealant that cures by reacting with air humidity to form a tough and highly elastic seal. It has a very wide service-temperature range and is suitable for both vertical and horizontal joints.
Applications
- General sealing of construction and expansion joints
- Basement walls
- Precast concrete elements
- Bonding and sealing of concrete, wood, marble, stone, aluminium, steel, ceramic, gypsum board and glass
Advantages
- Very easy and economical to use; one component
- Solvent-free
- Excellent ageing resistance
- Paintable (consult the KingKrete Technical Department)
- Remains elastic at low temperatures
- Good resistance to micro-organisms and a range of chemicals
- Good adhesion to concrete without the need for priming
- Excellent storage stability and shelf life; low VOC
Technical Properties
| Property | Value | Standard |
|---|---|---|
| Colour | White, grey, beige, black | — |
| Density | 1.47 ± 0.05 g/cm³ | — |
| Shore A hardness (ASTM C661) | 40 ± 5 @ 7 days | — |
| Service temperature | -20 to 70°C | — |
| Application temperature | 5 to 50°C | — |
| Adhesion in peel – concrete/aluminium/glass (ASTM C794) | Pass, no adhesion loss | — |
| Tack-free time (ASTM C679) | 1:00 – 2:00 hr @ 23°C & 50% RH | — |
| Curing rate | ≈ 2.5 mm/day @ 23°C & 50% RH | — |
| Skin time | 30 – 50 min @ 23°C & 50% RH | — |
| Tooling time | 20 min @ 23°C & 50% RH | — |
| Elongation at break (ASTM D412) | ≥ 500% @ 7 days | — |
| Tensile strength (ASTM D412) | ≥ 1.8 MPa @ 7 days | — |
| Tear strength (ASTM D624) | 7 kN/m @ 7 days | — |
| Effects of accelerated weathering (ASTM C793) | No cracking | — |
| Effects of heat ageing (ASTM C1246) | Pass @ 70°C | — |
| Effects of continuous immersion (ASTM C1247) | Pass, Class 2 | — |
| Movement accommodation (ASTM C719) | ± 35% | — |
| VOC | ≤ 10 g/ltr (LEED-compliant) | — |
Standards & Approvals
Usage & Packaging
KingSeal PU155 is available in 600 ml sausages. 300 ml sausages and 300 ml cartridges are available on request.
Yield depends on joint width and depth; size joints per the project's movement-accommodation requirement (± 35%, ASTM C719) and consult KingKrete Technical Department for a rate specific to the joint design.
Store in unopened original packaging in cool, dry conditions between 5°C and 25°C, protected from direct sunlight and moisture. Under these conditions the shelf life is 12 months from the date of manufacture.
Cartridge/Sausage