Songhan Plastic Technology Co.,Ltd.
 POLYMER SEARCH

3M AC-251 Gray Class B-2 Aerospace Sealant

Category Polymer , Thermoset
Manufacturer 3M
Trade Name
Port Ningbo port,China
Trade Terms FOB, CFR, CIF
Payment Terms L/C, T/T, Western Union
Download PDF 3M AC-251 Gray Class B-2 Aerospace Sealant.pdf
Price EMAIL US    sales@lookpolymers.com
  Online Service   lookpolymers   27660005
Material Notes:
3M Aerospace Sealant AC-251 Gray Class B are two-part, quick curing, polysulfide based canopy and windshield sealants. These products are formulated for sealing acrylic, glass, and polycarbonate aircraft canopies and windshields. 3M AC-251 Gray Class B Sealants contain no solvents and do not craze. The sealants quickly cure and exhibit excellent adhesion and resistance to UV and weather exposure. 3M AC-251 Gray Class B Sealants have a thixotropic, non-sag consistency. They can be readily applied with a spatula or extrusion gun on vertical surfaces.Information provided by 3M
Physical Properties Metric English Comments
Density 1.59 g/cc
0.0574 lb/in³
cured 14 days @ 50% RH; AMS-S-8802
Volatiles 2.0 %
2.0 %
Brookfield Viscosity 900000 - 1.60e+6 cP
900000 - 1.60e+6 cP
Base, RVF #7 sp @ 2 rpm
Mechanical Properties Metric English Comments
Hardness, Shore A 55
55
cured 14 days @ 50% RH; AMS-S-8802
Tensile Strength at Break 2.14 MPa

@Temperature 121 °C,
Time 605000 sec
310 psi

@Temperature 250 °F,
Time 168 hour
2.41 MPa

@Time 1.21e+6 sec
350 psi

@Time 336 hour
Standard Cure
Elongation at Break 300 %

@Temperature 121 °C,
Time 605000 sec
300 %

@Temperature 250 °F,
Time 168 hour
370 %

@Time 1.21e+6 sec
370 %

@Time 336 hour
Standard Cure
Thermal Properties Metric English Comments
Maximum Service Temperature, Air 121 °C
250 °F
AMS-S-8802, cured 14 days @ 50% RH
182 °C
360 °F
AMS-S-8802, cured 14 days @ 50% RH
Minimum Service Temperature, Air -54.0 °C
-65.2 °F
AMS-S-8802, cured 14 days @ 50% RH
Processing Properties Metric English Comments
Cure Time 480 min
8.00 hour
Tack-Free Time
540 min
9.00 hour
Shelf Life 9.00 Month

@Temperature <=26.7 °C
9.00 Month

@Temperature <=80.1 °F
Descriptive Properties Value Comments
Appearance Black
Accelerator
Gray
White
Base
Copyright © lookpolymers.com All Rights Reserved