
APP INTERNATIONAL
App Protect 2
Seam Sealers & Underbody Protection
APP Protect is a high-performance, rubberized underbody coating designed to provide superior protection for vehicle chassis and body panels. Once cured, it forms a tough, flexible, and tightly adherent barrier that permanently seals chassis fasteners, preventing loosening caused by road vibration.
Key features
- Long-term corrosion resistance on metal surfaces
- Stone chip and gravel protection for underbody components and wheel arches
- Reduces road and tire noise transmission into the cabin
- Antistatic effect
- Non-flammable after full cure
- Rapid drying, outstanding flexibility and strong adhesion
- Superior water and corrosion resistance, and high impact strength
Specifications
| Colour | Black viscous liquid |
| Odour | Alcohol odor |
| Viscosity (25°C), KU | 85±5 |
| Flexibility, mm | ≥3 |
| Adhesion | Not less than level 2 |
| Water resistance | No whiteness, foaming or shedding after being soaked for more than 240 hours |
| Storage temperature | 0–45°C |
| Shelf life | 36 months (when stored under recommended conditions) |
| Packing | 1 kg per cartridge / 12 cartridges per carton |
Real values may have deviations.
How to use
- Thoroughly clean the chassis or cabin areas using a high-pressure washer. On older vehicles, remove all rust and sand affected areas to achieve a clean, contaminant-free surface (free of water, dust, oil, grease, or wax). Blow-dry completely after cleaning.
- Mask and protect all areas not to be coated using suitable materials that will remain secure during spraying.
- Shake the cartridge vigorously for approximately 2 minutes, insert the dedicated APP spray gun and connect to a compressed air supply of 0.60–0.80 MPa (6–8 bar).
- Apply evenly in a back-and-forth motion from a distance of 25–50 cm, in multiple thin coats (recommended: three coats) with a 10-minute flash-off time between coats at room temperature.
- After the first coat, seal all holes, seams, and joints with appropriate sealant before continuing. A minimum dry film thickness of 2 mm is recommended to achieve optimal sound deadening and corrosion protection.
Typical applications
- Vehicle chassis, underbody panels, wheel arches, and cabin floors on passenger cars, commercial vehicles, and trucks
- General industrial applications
- Building waterproofing
- Other surfaces requiring durable protective coating
Talk to our team
Pricing, availability and technical support from App International, Prestons NSW.
Phone 1300 571 757 | Mobile +61 439 742 757
Open 8am–6pm, 7 days