Construction joints
Concrete, tunnel and drainage sealants — 550–615% elongation, elastic recovery up to 80%.
KA340A
Construction Sealant
Flexible sealant for concrete joints, tunnels and drainage.
KA340B
Construction Sealant
Low-movement, water-pressure-resistant grade for tunnels and drainage.
Compare the models
Typical values from the catalogue; the batch record carries the measured result.
Choosing one
Pick by movement first. A façade joint that opens 25% needs the softer KA340A at 615% elongation and 75% recovery; a below-grade or drainage joint that resists water pressure needs KA340B and its higher modulus. Movement class decides, then substrate condition, then primer.
Send joint width, expected movement and substrate and we will return the class and the grade. 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.
- 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.
- Activators and primers — Surface preparation that decides whether the bead holds: K-901 activator, K-801 primer.