KA340B · Construction joints
KA340B Construction Sealant
Low-movement, water-pressure-resistant grade for tunnels and drainage.
- Model
- KA340B
- Packs
- 310 ml · 400 / 600 ml · 200 L / 250 kg
- Tensile strength
- 2.0
- Elongation at break
- 550
What it is
One-component moisture-curing polyurethane for low-movement, high-penetration-resistance joints; high modulus, water-pressure resistant, solvent- and DOP-free.
Specification
| Test | Standard | Typical value | Method |
|---|---|---|---|
| Appearance | — | Black / White / Gray | — |
| Density (g/cm³) | 1.5±0.1 | 1.5 | GB/T 13477.2 |
| Sag resistance (mm) | ≤0.5 | 0 | GB/T 13477.6 |
| Skin time (min) | 30–60 | 40 | GB/T 13477.5 |
| Cure rate (mm/day) | ≥3.0 | 3.0 | HG/T 4363 |
| Volatile content (%) | ≤3 | 1 | GB/T 2793 |
| Shore A hardness | 40–50 | 48 | GB/T 531.1 |
| Tensile strength (MPa) | ≥1.5 | 2.0 | GB/T 528 |
| Elongation at break (%) | ≥500 | 550 | GB/T 528 |
| Elastic recovery (%) | ≥80 | 80 | GB/T 7124 |
| Extrusion rate (ml/min) | ≥250 | 320 | GB/T 13477.4 |
Typical values from the printed catalogue, transcribed as printed. Where the catalogue printed a unit that does not fit the value (density in g/m³), the page shows g/cm³ — see the note below.
Catalogue notes.
- Density printed as g/m³; elastic recovery also cites GB/T 7124.
Packaging
| Format | Size | Carton / unit |
|---|---|---|
| cartridge | 310 ml | 12 / 20 / 24 pcs |
| sausage | 400 / 600 ml | 20 pcs |
| barrel | 200 L / 250 kg | — |
Where it is used
- Waterproofing on the wet face of bridges, tunnels and drainage pipes
- Bonding and sealing precast panels, concrete internal walls and stone
The rest of the family
| Model | Difference | Tensile | Elongation |
|---|---|---|---|
| KA340A | Flexible sealant for concrete joints, tunnels and drainage. | 2.5 | 615 |
Further reading
Construction joint sealant: movement, geometry and failure — the guide this model belongs to
Ordering. Send the model, quantity, pack format and destination — we reply with
FOB/CIF pricing, lead time and the documents your customs broker will ask for.
Email a quote request or write to ryan@pu-karmind.net.