K-801 · Activators and primers
K-801 Primer
Black primer that builds the adhesion film under PU and STP sealants.
- Model
- K-801
- Packs
- 5 / 10 / 50 / 250 ml, 1 L
- Tensile strength
- —
- Elongation at break
- —
What it is
Primer applied to the substrate before sealant or adhesive; forms a cured film that improves adhesion, with good coverage and UV resistance.
When not to use it. Not a substitute for cleaning. A primer applied over oil or mould release bonds to the contamination, not to the substrate, and it is not for frits that are already sealed or painted.
Specification
| Test | Standard | Typical value | Method |
|---|---|---|---|
| Appearance | — | Black liquid | — |
| Density (g/cm³) | 0.85–1.0 | 0.9 | — |
| Skin time (min) | ≤10 | 8 | — |
| Activation time (min) | 30–45 | 30 | — |
| Active content (%) | 6–15 | 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
Coverage and shelf life are brochure figures. Adhesion is verified by a peel test on a coupon of the actual substrate; no primer can be certified for a substrate it has not been tested on.
Packaging
| Format | Size | Carton / unit |
|---|---|---|
| can | 5 / 10 / 50 / 250 ml, 1 L | — |
Where it is used
- Substrate preparation before applying sealants and adhesives
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.
- Painting over seam sealer without a comeback — Cure window, primer compatibility and the waterborne basecoat trap: why a sealer that passed the thumb test can still ruin a paint job on the car.
The rest of the family
| Model | Difference | Tensile | Elongation |
|---|---|---|---|
| K-901 | Surface activator for glass, metal, ceramic and painted substrates. | — | — |
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].