Activators and primers
Surface preparation that decides whether the bead holds: K-901 activator, K-801 primer.
K-901
Activator
Surface activator for glass, metal, ceramic and painted substrates.
K-801
Primer
Black primer that builds the adhesion film under PU and STP sealants.
Compare the models
Typical values from the catalogue; the batch record carries the measured result.
Choosing one
Buy the preparation with the adhesive, not after it. K-901 cleans and prepares the frit; K-801 builds an adhesion film where a primerless grade cannot bond. Both ship in 5 ml to 1 L cans with a six-month unopened shelf life, so order against a production date rather than holding stock.
Send the substrate and the adhesive model and we will confirm whether a primer is required. ryan@pu-karmind.net
Other families
- Automotive glass bonding — Windscreen, side and rear glass adhesives — 310 ml cartridges, sausages and 200 L barrels.
- Body and sheet metal — Seam sealers for body panels, doors and container joints — sandable, paintable, four colours.
- Construction joints — Concrete, tunnel and drainage sealants — 550–615% elongation, elastic recovery up to 80%.
- Industrial and STP — Silyl-terminated polymer sealant for metal, plastic and glass — primerless and paintable.
- Wood and glulam — One-component PUR for engineered timber, glulam beams and sandwich panels.