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Permatex 3D Aviation Form-A-Gasket No3 16oz Bottle (Meets MIL-S-45180D Type 3)

Permatex 3D Aviation Form-A-Gasket No3 16oz Bottle (Meets MIL-S-45180D Type 3)
Permatex Aviation Form-A-Gasket No. 3 Sealant is a dark reddish brown, viscous liquid with a characteristic alcoholic odour.  read more
£17.91 excl VAT
(£21.49 Inc VAT)
16 In Stock
Bulk discounts
£17.91 + VAT
£17.01 + VAT
£16.57 + VAT
£16.12 + VAT

Product Information

Features of No3:

  • For close tolerance flanges
  • Slow drying
  • Flexible setting
  • Withstands pressures to 5000 psi

It is a slow drying, liquid that changes to a pliable, tacky film through solvent evaporation. It seals close fitting parts, machined surfaces and threaded connections in industrial, aircraft, marine and automotive applications.


  • Solid gasket dressing
  • Close fitting machined surfaces
  • Threaded connections
  • Aviation engines
  • Marine engines


  •  Conforms to MIL-S-45180D, Type III

Specifications and Information

Technical Information

£17.91 excl VAT
(£21.49 Inc VAT)
16 In Stock
Product Code
Commodity Code
Country Of Origin
United States
UN Number
UN1866 CL3 II

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.

Delivery information

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.