As listed
| Field | Value |
|---|---|
| Seller | LAS Aerospace |
| Seller's item # | F021G4SJV |
| Type | Two-part manganese dioxide cured polysulfide |
| Class A | Brush sealing of fasteners, up to 25 mils thick |
| Class B | Low-sag paste for fillet sealing, by gun or spatula |
| Service temperature | -54 °C to 121 °C, excursions to 135 °C |
| Packaging | 100 ml and 150 ml Semkits |
| Listing checked | 2026-09-30 |
Taken from LAS Aerospace's product page on 2026-09-30. Where the listing does not state a figure, this table does not either.
What it is for
The number after the class (1/2, 2) is the grade: roughly how long you can work it. LAS writes the Class B low end as "-65°C (-54°C)"; the Class A text gives -65 °F (-54 °C), which is the figure we show.
Which class and grade a repair calls for is in the aircraft's maintenance data, not in this listing.
Sizes listed
| Part | Type | Cure Time | Size |
|---|---|---|---|
| PR1440-A1/2-150ML-SEM | Type A | 1/2 Hour | 150ml Semkit |
| PR1440-A2-150ML-SEM | Type A | 2 Hour | 150ml Semkit |
| PR1440-B1/2-150ML-SEM | Type B | 1/2 Hour | 150ml Semkit |
| PR1440-B2-100ML-SEM | Type B | 2 Hour | 100ml Semkit |
| PR1440-B2-150ML-SEM | Type B | 2 Hour | 150ml Semkit |
As listed by LAS Aerospace on 2026-09-30. Check the live listing before ordering: stock and part numbers change.
Where to buy
The link opens LAS Aerospace's own page for this item, so the price and stock you see are theirs and current. We do not copy prices.
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Sources
- LAS Aerospace — PR1440 Fuel Tank Sealant — product listing, item F021G4SJV, checked 2026-09-30.