K-901 · Activators and primers
K-901 Activator
Surface activator for glass, metal, ceramic and painted substrates.
- Model
- K-901
- Packs
- 5 / 10 / 50 / 250 ml, 1 L
- Tensile strength
- —
- Elongation at break
- —
What it is
Surface activator that cleans the bonding interface and raises surface activity on glass, metal, ceramic and painted surfaces.
When not to use it. Not a primer and not a cleaner for silicone residue. Where the substrate is unknown or previously repaired with silicone, K-901 alone is not enough: add K-801 and test a coupon.
Specification
| Test | Standard | Typical value | Method |
|---|---|---|---|
| Appearance | — | Clear liquid | — |
| Density (g/cm³) | 0.8±0.1 | 0.8 | — |
| Skin time (min) | 5–10 | 8 | — |
| Activation time (min) | 5–50 | 30 | — |
| Active content (%) | ≥5 | 6 | — |
| Application temperature (°C) | — | +5 to +35 | — |
| Shelf life | — | 6 months unopened | — |
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
Six months unopened is a brochure shelf figure. There is no published adhesion number because an activator is judged by the bond it enables, not by a property of its own.
Packaging
| Format | Size | Carton / unit |
|---|---|---|
| can | 5 / 10 / 50 / 250 ml, 1 L | — |
Where it is used
- Surface preparation before bonding glass, metal, ceramic and painted surfaces
Read before you specify
- Primerless windscreen adhesive: what it covers — Primerless PU adhesives cut a process step, not the preparation. What the claim covers on glass, paint and metal, and where it stops being true.
- Primerless STP claims, tested by substrate — Which substrates genuinely bond without a primer, which need an activator, and the ten-minute coupon test that settles it before a production run.
- Windscreen adhesive cure time: why a bead stays soft — Why a bead is still soft the next morning: cold glass, dry air, thick sections and the four reasons a cure runs late, with the arithmetic that predicts it.
The rest of the family
| Model | Difference | Tensile | Elongation |
|---|---|---|---|
| K-801 | Black primer that builds the adhesion film under PU and STP sealants. | — | — |
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].