KA340A · Construction joints
KA340A Construction Sealant
Flexible sealant for concrete joints, tunnels and drainage.
- Model
- KA340A
- Packs
- 310 ml · 400 / 600 ml · 200 L / 250 kg
- Tensile strength
- 2.5
- Elongation at break
- 615
What it is
One-component moisture-curing polyurethane construction sealant for joints in concrete and stone; flexible, puncture resistant, repairable, high modulus and water-pressure resistant.
Specification
| Test | Standard | Typical value | Method |
|---|---|---|---|
| Appearance | — | Black / White / Gray | — |
| Density (g/cm³) | 1.45±0.1 | 1.46 | GB/T 13477.2 |
| Sag resistance (mm) | ≤3 | 0 | GB/T 13477.6 |
| Skin time (min) | 60–90 | 65 | GB/T 13477.5 |
| Cure rate (mm/day) | ≥3.0 | 3.0 | HG/T 4363 |
| Volatile content (%) | ≤8 | 1 | GB/T 2793 |
| Shore A hardness | 30–40 | 35 | GB/T 531.1 |
| Tensile strength (MPa) | ≥2 | 2.5 | GB/T 528 |
| Elongation at break (%) | ≥600 | 615 | GB/T 528 |
| Elastic recovery (%) | ≥70 | 75 | GB/T 13477.13 |
| Extrusion rate (ml/min) | ≥250 | 300 | 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.
- Elastic recovery is cited as GB/T 7124 in one edition of the brochure and GB/T 13477.13 in the other; GB/T 7124 is a shear-strength standard, so the 13477 series applies here.
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
- Joints in underground tunnels and bridge tunnels
- Drainage and sewer pipe joints
- Epoxy floors and concrete joints
- Sealing wall and floor penetrations
The rest of the family
| Model | Difference | Tensile | Elongation |
|---|---|---|---|
| KA340B | Low-movement, water-pressure-resistant grade for tunnels and drainage. | 2.0 | 550 |
Further reading
Construction joint sealant: movement, geometry and failure — the guide this model belongs to
- PU sealant vs silicone: which one for which joint
- Joint design decides whether the sealant works
- Importing PU sealant from China: the eight checks
- Joint movement class: the number that decides the sealant
- Backer rod sizing and three-sided adhesion
- Why PU sealant costs more than silicone per cartridge
- Batch certificate vs catalogue value
- Sealing green and damp concrete: why it fails later
- Sealing tunnel and drainage joints under water pressure
- Cold-weather joint sealing: the double problem
- Ten questions for a sealant factory visit
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.