KA540 · Body and sheet metal
KA540 Automotive Sheet Metal Adhesive
High-modulus seam sealer for body panels, sandable and paintable.
- Model
- KA540
- Packs
- 310 ml · 400 / 600 ml · 200 L / 250 kg
- Tensile strength
- 2.5
- Elongation at break
- 600
What it is
One-component moisture-curing high-modulus polyurethane for sheet metal seams; thixotropic, sandable and paintable, solvent-free, low VOC, non-yellowing.
When not to use it. Not a structural adhesive and not a panel bond. Where the OEM drawing specifies a crash-rated bond, a 2.5 MPa sealer is the wrong class: that bond line is 0.2–0.5 mm and the product family is different.
Specification
| Test | Standard | Typical value | Method |
|---|---|---|---|
| Appearance | — | Black / White / Gray / Beige | — |
| Density (g/cm³) | 1.5±0.1 | 1.50 | GB/T 13477.2 |
| Sag resistance (mm) | ≤0.5 | 0 | GB/T 13477.6 |
| Skin time (min) | 30–60 | 35 | GB/T 13477.5 |
| Cure rate (mm/day) | ≥3 | 3.5 | HG/T 4363 |
| Volatile content (%) | ≤2 | 1 | GB/T 2793 |
| Shore A hardness | 40–50 | 45 | GB/T 531.1 |
| Tensile strength (MPa) | ≥2 | 2.5 | GB/T 528 |
| Elongation at break (%) | ≥500 | 600 | GB/T 528 |
| Tensile shear strength (MPa) | ≥1.5 | 2 | 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.
How the numbers were measured
2.5 MPa and 600% are GB/T 528 typicals on cured sealant. Sandability and paintability are workshop properties: test a coupon with your own topcoat, because adhesion depends on the paint system, not on the sealant alone.
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
- Sealing body skins and aluminium trim panels
- Bonding and sealing interior body components
- Edge sealing for doors, tailgates and bonnets
- Seam sealing on welded body joints
- Body sealing on converted and specialty vehicles
- Waterproofing container seams
Further reading
Body seam sealing: sealer, adhesive or both — the guide this model belongs to
- PU sealant vs silicone: which one for which joint
- How to read a sealant data sheet
- Seam sealer vs structural adhesive: which seam gets which
- Painting over seam sealer without a comeback
- Seam sealer and corrosion at lapped joints
- Why PU sealant costs more than silicone per cartridge
- Sealing container and trailer seams: STP or PU
- MOQ and pack economics: why the number changes per format
- Cartridge, sausage or barrel: pack economics
- Running a sealant sample trial that means something
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 [email protected].