KAM921 · Industrial and STP
KAM921 STP Sealant
Silyl-terminated polymer sealant: silicone weathering, PU strength, paintable.
- Model
- KAM921
- Packs
- 310 ml (plastic) · 400 / 600 ml · 200 L / 250 kg
- Tensile strength
- 1.8
- Elongation at break
- 450
What it is
One-component moisture-curing silane-modified polyether sealant combining silicone weatherability with polyurethane strength; low odour, mould resistant, paintable, primerless on many substrates, PVC- and solvent-free.
Specification
| Test | Standard | Typical value | Method |
|---|---|---|---|
| Appearance | — | Black / White / Gray | — |
| Density (g/cm³) | 1.45±0.1 | 1.45 | GB/T 13477.2 |
| Sag resistance (mm) | 0 | 0 | GB/T 13477.6 |
| Skin time (min) | 20–40 | 30 | GB/T 13477.5 |
| Cure rate (mm/day) | ≥3 | 3.0 | HG/T 4363 |
| Volatile content (%) | ≤4 | 3 | GB/T 13477.19 |
| Shore A hardness | 35–45 | 40 | GB/T 531.1 |
| Tensile strength (MPa) | ≥1.5 | 1.8 | GB/T 528 |
| Elongation at break (%) | ≥400 | 450 | GB/T 528 |
| Elastic recovery (%) | ≥80 | 100 | GB/T 13477.4 |
| Application temperature (°C) | — | +5 to +35 | — |
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.
- One brochure table lists Extrudability (ml/min) where the other lists elastic recovery %; two different properties on the same row, to be confirmed with the factory.
- Elastic recovery cites GB/T 13477.4, which is the extrudability standard.
Packaging
| Format | Size | Carton / unit |
|---|---|---|
| cartridge | 310 ml (plastic) | 12 / 20 / 24 pcs |
| sausage | 400 / 600 ml | 20 pcs |
| barrel | 200 L / 250 kg | — |
Where it is used
- Elastic sealing in the manufacture and repair of vehicles, vessels and industrial equipment
- Self-bonding and mutual bonding between metal, plastic and glass
- Sealing gaps and joints
Further reading
STP sealant: where it beats PU and where it does not — the guide this model belongs to
- PU sealant vs silicone: which one for which joint
- MS polymer vs PU for windscreen bonding
- Primerless STP claims, tested by substrate
- Sealing container and trailer seams: STP or PU
- Overcoating STP sealant: paint systems and cure windows
- MOQ and pack economics: why the number changes per format
- STP sealant outdoors: UV, colour and chalk
- 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 ryan@pu-karmind.net.