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3M AC-770 Class B-2 Aerospace Sealant
| Category | Polymer , Thermoset |
| Manufacturer | 3M |
| Trade Name | |
| Port | Shanghai port,China |
| Trade Terms | FOB, CFR, CIF |
| Payment Terms | L/C, T/T, Western Union |
| Download PDF | 3M AC-770 Class B-2 Aerospace Sealant.pdf  |
| Price | EMAIL US sales@lookpolymers.com |
Material Notes:
3M Aerospace Sealant AC-770 Class B are fast cure, low density two-component, manganese dioxide cure, polysulfide fuselage sealants. 3M AC-770 Class B Sealants have outstanding resistance to aviation gasoline and jet fuel, as well as resistance to chemicals and petroleum products common to the aircraft industry. 3M AC-770 Class B Sealants maintain flexibility and bond strength on most metal substrates like aluminum, titanium, stainless steel, steel, and many coatings under extremes of temperature, weathering and stress. The mixed compound is a thixotropic paste easily applied by extrusion, injection gun or spatula. They have excellent tooling properties.Information provided by 3M
| Physical Properties | Metric | English | Comments |
|---|---|---|---|
| Density | 1.10 g/cc | 0.0397 lb/in³ | cured 14 days @ 50% RH |
| Volatiles | 1.5 % | 1.5 % | |
| Brookfield Viscosity | 950000 - 1.30e+6 cP | 950000 - 1.30e+6 cP | Base, RVF #7 sp @ 2 rpm |
| Mechanical Properties | Metric | English | Comments |
|---|---|---|---|
| Hardness, Shore A | 42 - 48 | 42 - 48 | cured 14 days @ 50% RH |
| Tensile Strength at Break | 1.72 MPa @Temperature 336 °C |
249 psi @Temperature 637 °F |
Standard Cure in ASTM Fuel B in ASTM D471 Reference Fuel B |
| 1.83 MPa @Temperature 49.0 °C, Time 173000 sec |
265 psi @Temperature 120 °F, Time 48.0 hour |
||
| Elongation at Break | 330 % | 330 % | 7 days @ 49°C in ASTM Fuel B 48 hrs @ 49°C |
| 310 % @Time 1.21e+6 sec |
310 % @Time 336 hour |
Standard Cure in ASTM Fuel B in ASTM D471 Reference Fuel B |
| Thermal Properties | Metric | English | Comments |
|---|---|---|---|
| Maximum Service Temperature, Air | 121 °C | 250 °F | cured 14 days @ 50% RH |
| Minimum Service Temperature, Air | -54.0 °C | -65.2 °F | cured 14 days @ 50% RH |
| Processing Properties | Metric | English | Comments |
|---|---|---|---|
| Cure Time | 420 - 480 min | 7.00 - 8.00 hour | Tack-Free Time |
| 540 - 660 min | 9.00 - 11.0 hour | ||
| Shelf Life | 9.00 Month @Temperature <=26.7 °C |
9.00 Month @Temperature <=80.1 °F |
| Descriptive Properties | Value | Comments |
|---|---|---|
| Appearance | Brown | Accelerator |
| Dark Brown | ||
| Off White | Base |
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