# KA520 High-Strength Windscreen Adhesive

> Higher-modulus grade for bus and coach glazing.

Model: KA520 · Family: Automotive glass bonding · Source: https://karmindadhesive.com/products/ka520-high-strength-windshield-adhesive/

## What it is

One-component moisture-curing high-strength polyurethane windshield adhesive. Excellent bonding and sealing, solvent-free, no bubbles, no corrosion or staining of substrates, high adhesion and hardness after cure, water and ageing resistant.

## Specification (typical values)

| Test | Standard | Typical value | Method |
|---|---|---|---|
| Appearance | — | Black homogeneous paste | — |
| Density (g/cm³) | 1.4±0.1 | 1.41 | GB/T 13477.2 |
| Sag resistance (mm) | ≤0.5 | 0 | GB/T 13477.6 |
| Skin time (min) | 30–50 | 40 | GB/T 13477.5 |
| Cure rate (mm/day) | ≥3.0 | 3.2 | HG/T 4363 |
| Volatile content (%) | ≤2 | 1 | GB/T 2793 |
| Shore A hardness | 55–65 | 60 | GB/T 531.1 |
| Tensile strength (MPa) | ≥4 | 4.5 | GB/T 528 |
| Elongation at break (%) | ≥400 | 450 | GB/T 528 |
| Tensile shear strength (MPa) | ≥3.0 | 3.5 | GB/T 7124 |
| Extrusion rate (ml/min) | ≥60 | 70 | GB/T 13477.4 |

## Packaging

| Format | Size | Carton / unit |
|---|---|---|
| cartridge | 310 ml | 12 / 20 / 24 pcs |
| sausage | 400 / 600 ml | 20 pcs |
| barrel | 200 L / 250 kg | — |

## Where it is used

- Bonding of windscreens and side glass to the body on cars, buses and special vehicles

## Catalogue notes

- Same g/m³ typesetting error: at 1.41 the unit should be g/cm³.

## Ordering

Prices are quoted per order. Email martin@karmindadhesive.com with model, quantity, pack format, destination and substrate.