PPG PR-1440 AMS-S-8802 Class B-2 Fuel Tank Sealant – 6 oz Semkit for Gun Application

PPG PR-1440 in 6 oz Semkit format provides the most convenient and quality-assured method of applying AMS-S-8802 Type 2 Class B-2 fuel tank sealant using a Semco extrusion gun. The Semkit is a pre-packaged, factory-loaded sealant cartridge in which the two-component polysulfide sealant base and accelerator are pre-measured and separated by a barrier, ready to be mixed in the gun during application by a simple activation step — eliminating the need for manual weighing, mixing, and transfer into a gun.

The Semkit format provides significant advantages in quality assurance over manually mixed bulk sealant: factory pre-measurement eliminates mix ratio errors that can result in under-cured sealant; the sealed cartridge prevents contamination, moisture exposure, and skinning of the sealant components before activation; and the gun-applied extrusion format provides consistent bead geometry for fillet and injection sealing applications.

The 6 oz Semkit size is suitable for moderate-scale sealing jobs — larger than single-joint repairs but smaller than full tank resealing operations. The Class B-2 extended working life grade provides generous application time after activation, particularly important when a Semkit is activated at the start of a maintenance task and must remain workable throughout the entire sealing sequence.

Technical Information

The Semkit concept was developed specifically for aerospace sealant application to address the mix ratio control challenges and contamination risks associated with manual bulk sealant mixing. Each Semkit is factory-loaded with precisely pre-measured quantities of base and accelerator in the correct ratio for the specified product, verified by quality control before shipment. When the Semkit is activated in the Semco gun, the separator between the two components is pierced and the components are mixed as the gun plunger advances the material through the static mixer nozzle toward the outlet.

The Class B-2 working life of PR-1440 in Semkit format begins at the time of activation (when the Semkit components are first mixed during gun operation), not at the time of manufacture or packaging. This ensures the full Class B-2 working life is available to the technician from the moment of first use. The remaining activated Semkit must be used within the working life period or discarded if the sealant gels before the application is complete.

Semkit gun operation requires the appropriate Semco gun model that accommodates the Semkit cartridge format. The static mixer nozzle attached to the Semkit outlet mixes the two components in the correct ratio as the sealant is extruded, delivering pre-mixed sealant at the gun tip ready for application to the joint surface.

Why Choose PR-1440 Semkit Format?

• ✅ Factory Pre-Measured — Eliminates mix ratio errors and quality risks
• ✅ No Manual Mixing — Reduces labor and contamination risk
• ✅ AMS-S-8802 Type 2 Class B-2 — Full specification compliance
• ✅ Direct Gun Application — Consistent bead size and placement
• ✅ 6 oz Size — Right quantity for moderate-scale fuel tank sealing jobs

Applications and Compatible Aircraft

PPG PR-1440 Semkit is used for fuel tank fillet sealing, injection sealing, and fastener wet installation on commercial and military aircraft fuel tanks where AMS-S-8802 Type 2 Class B-2 sealant is specified and Semco gun application is preferred for quality and efficiency.

Frequently Asked Questions

Q: What is a Semkit?
A: A Semkit is a factory pre-packaged, pre-measured two-component sealant cartridge designed for use with a Semco extrusion gun. It eliminates manual mixing by containing the pre-measured base and accelerator in separated compartments that mix automatically when the Semkit is activated in the gun.

Q: What gun is required for PPG PR-1440 Semkit?
A: PR-1440 Semkit requires a Semco sealant gun compatible with the Semkit cartridge format. Consult PPG or Semco for the appropriate gun model for your Semkit size.

Q: What is the MPN for PR-1440 6oz Semkit Class B-2?
A: MPN is 1440B-2AMS-S-8802F-6045K.

Q: When does the working life of the Semkit start?
A: The Class B-2 working life begins when the Semkit is activated in the gun — when the separator between the base and accelerator is pierced and mixing begins. The full working life is available from first activation.

Q: Can PR-1440 Semkit be used for faying surface sealing?
A: Semkit format is primarily used for fillet and injection sealing where gun application is practical. For faying surface sealing where brush application is required, the pint kit format is typically more appropriate. Consult the applicable maintenance manual for the specified application method at each joint location.