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3M AC-251 B-1/2 Aerospace Sealant 3.5oz Cartridge

3M AC-251 B-1/2 Aerospace Sealant 3.5oz Cartridge
AC-215 Class B is a two-part, polysulfide access door sealant for faying surfaces where easy separation of joined surfaces is required.
£144.85 excl VAT
£173.82 inc VAT
No stock - lead time 24 days
Please order in multiples of 6
Commodity Code: 32141010
Country of Origin: United States
Bulk discounts
£144.85 + VAT
£137.61 + VAT
£133.99 + VAT
£130.37 + VAT
It is a highly thixotropic reddish paste which can easily be applied with a spatula, putty knife or caulking gun. The cured AC-215 sealant has low adhesion and forms a tough, "rubbery" gasket that molds well to surface irregularities.


  • Access door sealant for aerospace metallic structure and pressurized vehicles
  • Gaskets for removable parts
  • Strippable fillets


MIL-S-8784 - GSA Approved
TAPS 1163 Ty IV- Qualified
299-947-074 - Qualified (Pre-mixed & Frozen)

Orders over £50 placed online will now qualify for FREE UK Mainland delivery*

Orders under £50 placed online for UK Mainland delivery is £8.00*

**Orders requiring Pre 10.00am Next Day delivery has also been lowered from £35.00 to £21.00, orders placed through the office will incur additional charges.** 

International delivery (door to door delivery) is available for selected countries worldwide. Shipping will be automatically calculated based on the weight, location and hazardous nature of the goods. Customers can also choose ex works to arrange their own collection.
Please refer to our delivery page for more information.

Document Downloads
Sil-Mid Limited DO NOT GUARANTEE that the information in these documents is the most up to date information available from the manufacturer, there are times when updated information is released and we are not made aware immediately.