
Sealants
3M Aerospace Sealant AC-735 (Class B)
SKU: AC-735
Brand: 3M
Pricing on request
Specifications
| Part Number | AC-735 |
|---|---|
| Material | two-part, manganese dioxide-cured polysulfide; non-chromate corrosion-inhibitive |
| Compliance | Meets MIL-PRF-81733 Type II, Class B (non-chromate, corrosion-inhibitive); also reported to meet AMS3265 |
Description
A non-chromate, corrosion-inhibitive, fast-cure, low-density two-component polysulfide fuselage sealant used for fuselage sealing, void filling and corrosion control. The manganese dioxide-cured, thixotropic paste (Class B) is applied by extrusion, injection gun or spatula; a companion Class A pourable/brushable liquid is also offered. Its low density is roughly 25% lower (about 3-4 lb/gal lighter) than traditional sealants.
Angad Aviation supplies this 3M product with full traceability and documentation — request a quote for current pricing, pack sizes and lead time.
- Brand: 3M
- Part No.: AC-735
- Chemistry: two-part, manganese dioxide-cured polysulfide; non-chromate corrosion-inhibitive
- Density: low density (~25% lower; ~3-4 lb/gal lighter than traditional sealants)
- Form: thixotropic paste (Class B); Class A is a pourable/brushable liquid
- Application life classes: B-1/2, B-2
- Applications: fuselage sealing, void filling, corrosion control
- Compliance: Meets MIL-PRF-81733 Type II, Class B (non-chromate, corrosion-inhibitive); also reported to meet AMS3265
Frequently asked
What are the key specifications?
Chemistry: two-part, manganese dioxide-cured polysulfide; non-chromate corrosion-inhibitive; Density: low density (~25% lower; ~3-4 lb/gal lighter than traditional sealants); Form: thixotropic paste (Class B); Class A is a pourable/brushable liquid; Application life classes: B-1/2, B-2; Applications: fuselage sealing, void filling, corrosion control.
How do I get pricing and lead time?
Angad Aviation supplies this 3M product quote-first — request a quote and our team responds with current price, pack sizes, availability and lead time. Every order ships with full traceability and documentation.



