Applications
The same chemistry behaves differently on glass, painted steel and concrete. These five pages group the range by what is being bonded, not by what is in the drum — and each one names the failure mode that brings the job back.
Choosing by load, movement and substrate
The application chooses the adhesive, not the reverse. A bonded windscreen works in shear and retention; a body seam in vibration and paint compatibility; a construction joint in movement and water; glulam in moisture and press time.
| Application | Dominant load | Movement | What decides failure | Model |
|---|---|---|---|---|
| Bonded glass | Shear and retention | Thermal and body movement | Adhesion and bead geometry | KA518 / KA520 / KA530F |
| Body seam | Vibration and temperature | Sheet metal expansion | Hardness, sanding and paint | KA540 |
| Construction joint | Movement and water | ±20–25% of joint width | Wet adhesion and recovery | KA340A / KA340B |
| Glulam and timber | Moisture and press | Wood shrinkage | Solids and press time | KA505 |
Joint example: 20 mm wide with ±25% movement is ±5 mm. The sealant must take that travel without debonding; 550–615% elongation does not replace an adhesion test on the actual substrate. Choose the family first, then the model, then confirm with a coupon.
Windscreen replacement
Bonded glazing is structural. The bead holds the glass in a crash, seals against water at 120 km/h and has to reach drive-away strength before the customer finishes paying. Three things decide whether it does: the adhesive, the bead, and the surface.
KA518 · KA520 · KA530F
Body shop and sheet metal
A seam sealer is judged twice: by the painter, who has to sand and cover it, and by the customer, who finds the crack eighteen months later. Most comebacks are not adhesion failures — they are a sealer that was too hard for a seam that moves.
KA540
Construction joints
Concrete moves. A joint sealed at 20 °C is compressed at 35 °C and pulled open at −10 °C, and the bead has to follow both without losing adhesion at the flanks. Two questions decide the grade: how much movement the joint carries, and whether water is pressing against it.
KA340A · KA340B
Glulam and timber
PUR wood adhesive cures by reacting with moisture in the wood and the air. That makes it strong and solvent-free, and it makes clamp time a function of the timber, not of the clock.
KA505
Not sure which applies? Describe the substrate and the joint movement in an email — we answer with a model, or with the reason none of them fits.