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Rulon Bearings

3M AC-250 A-1/6 Aerospace Sealant
Categories: Polymer; Thermoset; Polysulfide Sealant/Adhesive

Material Notes: 3M Aerospace Sealant AC-250 A-1/6 is a two-part, low temperature curing polysulfide, quick repair sealant for integral fuel tank and fuselage sealing applications. The mixed compound is a pourable liquid which can be applied with a spatula, extrusion gun, roller, or brush. It will cure to a fuel-resistant rubber at temperatures above -6.7°C.

Information provided by 3M

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Physical PropertiesMetricEnglishComments
Density 1.61 g/cc0.0582 lb/in³AMS-S83318
Volatiles <= 11 %<= 11 %
Brookfield Viscosity 100000 - 400000 cP100000 - 400000 cPBase, RVF #6 sp @ 2 rpm
 
Mechanical PropertiesMetricEnglishComments
Hardness, Shore A 4040Hydrolytic Stability; AMS-S83318
 5555AMS-S83318
Tensile Strength at Break 2.07 MPa
@Time 1.21e+6 sec
300 psi
@Time 336 hour
Standard Cure; AMS-S83318
 1.52 MPa
@Treatment Temp. 60.0 °C,
Time 1.21e+6 sec
220 psi
@Treatment Temp. 140 °F,
Time 336 hour
JRF; AMS-S83318
 2.14 MPa
@Treatment Temp. 121 °C,
Time 605000 sec
310 psi
@Treatment Temp. 250 °F,
Time 168 hour
JRF; AMS-S83318
Elongation at Break 220 %
@Time 1.21e+6 sec
220 %
@Time 336 hour
Standard Cure; AMS-S83318
 180 %
@Treatment Temp. 121 °C,
Time 605000 sec
180 %
@Treatment Temp. 250 °F,
Time 168 hour
JRF; AMS-S83318
 225 %
@Treatment Temp. 60.0 °C,
Time 1.21e+6 sec
225 %
@Treatment Temp. 140 °F,
Time 336 hour
JRF; AMS-S83318
Peel Strength  3.68 kN/m
@Temperature 60.0 °C,
Time 605000 sec
21.0 pli
@Temperature 140 °F,
Time 168 hour
JRF, Stainless Steel; AMS-S83318
 3.68 kN/m
@Temperature 60.0 °C,
Time 605000 sec
21.0 pli
@Temperature 140 °F,
Time 168 hour
JRF/SW, Alodine; AMS-S83318
 4.21 kN/m
@Temperature 60.0 °C,
Time 605000 sec
24.0 pli
@Temperature 140 °F,
Time 168 hour
JRF/SW, MIL-C-27725; AMS-S83318
 4.21 kN/m
@Temperature 60.0 °C,
Time 605000 sec
24.0 pli
@Temperature 140 °F,
Time 168 hour
JRF/SW, Alclad; AMS-S83318
 4.38 kN/m
@Temperature 60.0 °C,
Time 605000 sec
25.0 pli
@Temperature 140 °F,
Time 168 hour
JRF, MIL-C-27725; AMS-S83318
 4.38 kN/m
@Temperature 60.0 °C,
Time 605000 sec
25.0 pli
@Temperature 140 °F,
Time 168 hour
JRF, Alclad; AMS-S83318
 4.38 kN/m
@Temperature 60.0 °C,
Time 605000 sec
25.0 pli
@Temperature 140 °F,
Time 168 hour
JRF, Titanium; AMS-S83318
 4.56 kN/m
@Temperature 60.0 °C,
Time 605000 sec
26.0 pli
@Temperature 140 °F,
Time 168 hour
JRF/SW, Stainless Steel; AMS-S83318
 4.56 kN/m
@Temperature 60.0 °C,
Time 605000 sec
26.0 pli
@Temperature 140 °F,
Time 168 hour
JRF, Alodine; AMS-S83318
 4.73 kN/m
@Temperature 60.0 °C,
Time 605000 sec
27.0 pli
@Temperature 140 °F,
Time 168 hour
JRF/SW, Titanium; AMS-S83318
 
Thermal PropertiesMetricEnglishComments
Maximum Service Temperature, Air 121 °C250 °FAMS-S83318
Minimum Service Temperature, Air -54.0 °C-65.2 °FAMS-S83318
 
Processing PropertiesMetricEnglishComments
Cure Time  120 min
@Temperature 25.0 °C
2.00 hour
@Temperature 77.0 °F
 480 min
@Temperature 4.40 °C
8.00 hour
@Temperature 39.9 °F
 840 min
@Temperature -6.70 °C
14.0 hour
@Temperature 19.9 °F
Tack-Free Time  70.2 min
@Temperature 25.0 °C
1.17 hour
@Temperature 77.0 °F
 420 min
@Temperature 4.40 °C
7.00 hour
@Temperature 39.9 °F
 720 min
@Temperature -6.70 °C
12.0 hour
@Temperature 19.9 °F
Shelf Life 6.00 Month
@Temperature <=26.7 °C
6.00 Month
@Temperature <=80.1 °F
 
Descriptive Properties
Alkalinity13
AppearanceDark BrownAccelerator
 Gray
 WhiteBase

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