3M™ Aerospace Sealant AC-735 is a quick-curing polysulfide fuselage sealant formulated for easy tooling. Our corrosion inhibitive, fast cure, low density, manganese dioxide cure product is one of the lightest sealants available and also highly resistant to aviation fuel. It provides an effective seal on metals, composites, organic coatings and between dissimilar metals.

We engineered 3M™ Aerospace Sealant AC-735 specifically for fuselage applications, where it offers a number of advantages and benefits compared to traditional sealants. For starters, it is corrosion inhibitive yet contains no added chromate, which may help you comply with chromate reduction initiatives and OSHA requirements. Its lighter weight formula, 25% lower density than traditional sealants, saves vital aircraft weight. AC-735 maintains flexibility and bond strength on aluminum, titanium, steel, stainless steel, composites and many coatings under extremes of temperature, weathering and stress. Designed for easy tooling, it has outstanding resistance to jet fuel, chemicals and petroleum products common throughout the aerospace industry.

Class Distinction
3M™ Aerospace Sealant AC-735 Class A is a pourable liquid easily applied by brush or roller. It quickly fills critical gaps and seals cracks for effective corrosion control.

3M™ Aerospace Sealant AC-735 Class B is a two-component thixotropic paste and is lighter in weight – 25% lower density than traditional sealants, weighing an average of 3–4 lbs. less per gallon. AC-735 maintains flexibility and bond strength on various substrates under extremes of temperature, weathering, and stress. It is easily applied by extrusion, injection gun or spatula, and exhibits superb tooling properties. Our Class B version has no added solvents, which minimizes shrinkage to help reduce rework and improve processes.

Smart Sealants, Robust Results
When you use 3M Sealants, you're applying science, ingenuity, aerospace expertise and cost saving solutions. They have outstanding resistance to aviation gasoline and jet fuel, as well as resistance to chemicals and petroleum products common to the aircraft industry. 3M™ Aerospace Sealant AC-735 is carefully formulated for customers in the aerospace industry. Always read the SDS and Tech Data Sheet along with your internal governing documents prior to use.

Our Best for Your Best
3M is proud to partner with organizations across the spectrum of aerospace and related industries. Creating efficiencies, reducing process times and lowering aircraft weight is how we execute our never-ending mission to offer best-in-class adhesives, sealants and other products that effectively reduce costs on multiple fronts. Professionals across the industry know the numerous advantages of 3M Aerospace. Our brand is widely recognized for the highest standards of quality and performance, adding value to the final results. By engineering reliability, longevity and performance into all of our products, we have a history of saving money by reducing waste, rework and time.

• Non-chromate corrosion inhibitive formula helps comply with chromate reduction initiatives
• Easier application – requires less mixing time and less tooling to apply
• Low density formula weighs 3–4 lbs. less per gallon than traditional sealants
• Available in Class A and B to meet a range of requirements
• Quick cure allows increased throughput
• Low shrinkage results in less rework

• Color: Brown
• Package Quantity: 1 KIT
• Part Number: AC-735