Permatex Aviation Form-A-Gasket No. 3 Sealant
Permatex Permatex
  • Permatex Aviation Form-A-Gasket No. 3 Sealant

Permatex Aviation Form-A-Gasket No. 3 Sealant

Permatex Aviation Form-A-Gasket No. 3 Sealant is a slow-drying, non-hardening brush-applied liquid gasket/dressing/coating. Aviation Form A Gasket is a thin, brush-able dressing or sealer suitable for -65 to 400 F temperatures. Resists antifreeze, gasoline, oils, and lubricants. 4 oz. bottle. Also great for sealing tapered and straight threads on fuel fittings that require gasoline resistance.
$10.23 / ea
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Tech Spec Product Info User Generated Content

Suggested Applications:
Close-fitting machined surfaces, sealing hoses, solid gaskets, Threaded connections, Fuel fittings, marine engines, aviation engines

Chemical / Solvent Resistance   The product retains effective properties in contact with water, ethylene glycol, gasoline, motor oil, transmission fluid and sea water 
Product Benefits  For close tolerance flanges, Slow drying, Flexible setting, Withstands pressures to 5000 psi 
BRAND: Permatex
Type: Gasket Sealant
4.0 4

I would by this product again.


Sealer worked great, work as advertised.


Long Island, New York


Good Stuff


Did a head replacement. Used this on bolts and most gaskets (not head gasket). Seemed to work well.

Rhody Runner

Warren RI


Bad packaging by Jamestown


Jamestown should put items like this in a separate plastic bag AND tape around the cap of the bottle.


N. Illinois

Be Careful


While the product is very good the packaging was not. This is some very sticky stuff and despite the extra little flap of tape that JD put over the cap it still leaked all over the rest of the contents of my package. Either order this product alone or only with other products that can be wiped off with paint thinner or solvent.


West Alton, MO

Permatex Aviation Form-A-Gasket No. 3 Sealant



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