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3M AC-665 B-1/2 Aerospace Sealant 3.5oz Kit

3M AC-665 B-1/2 Aerospace Sealant 3.5oz Kit
3Mâ„¢ Aerospace Sealant AC-665 Class B is a two-part, chromate containing, corrosion inhibiting sealant.
Please order in multiples of 24
UN Number: UN3082 CL9 III
Limited Quantity: 5L

Excellent for sealing faying surfaces of mating parts and sealing joints from passage of liquid or air, these manganese cured sealants provide an effective barrier against the common causes of corrosion on aluminium and between dissimilar metals.

3Mâ„¢ AC-665 Class B Sealants have outstanding resistance to aviation gasoline and jet fuel, as well as resistance to chemicals and petroleum products commonly used in the aircraft industry. The mixed compound is a thixotropic paste, easily applied by spatula, extrusion gun or injection gun. They maintain flexibility and bond strength on most metal substrates under extremes of temperature, weathering and stress.


  • Contains Chromate
  • Less shrinkage due to low solvent formulation
  • Prevents corrosion
  • Easy to tool

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

Orders under £50 placed online for UK Mainland delivery is £6.95*

Orders requiring Pre 10.00am Next Day delivery has also been lowered from £35.00 to £19.50** 

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.