Definition of product version
| Version | Application Time (hours) |
| A-1/2 or B-1/2 | 1/2 |
| A-2 or B-2 | 2 |
| A-4 | 4 |
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Class A is designed for brush sealing with application up to 25mm. Used for fasteners in fuel tanks and other aircraft fuselage sealing applications. View the Class A range below.
Designed for fillet sealing of fuel tanks and other aircraft fuselage sealing applications. Class B is a low sag thixotropic paste, suitable for application by gun or spatula. View Silmids Class B range below.
| Version | Application Time (hours) |
| A-1/2 or B-1/2 | 1/2 |
| A-2 or B-2 | 2 |
| A-4 | 4 |
Corrosion Protection: PR-1440 provides excellent corrosion protection, making it suitable for use in critical aerospace applications where protection against corrosion is essential.
Compatibility: It is compatible with a wide range of substrates commonly used in aerospace structures, including metals, composites, and coated surfaces.
Flexibility: PR-1440 remains flexible over a wide temperature range, allowing it to accommodate structural movement and vibration without cracking or losing adhesion.
Chemical Resistance: The sealant offers resistance to various chemicals and fluids encountered in aerospace environments, including fuels, hydraulic fluids, and lubricants.
Cure Time: It typically cures at room temperature, although accelerated curing options are available for applications requiring faster turnaround times.