AS1500 total pages 3 page 1
AS1500
Characterization
A
S1500 is a 1 component, RTV silicone adhesive sealant. It is one in a range
of acetoxy cure products which are solvent-free. During cure, it liberates a
very small amount of acetic acid, giving rise to the familiar ´vinegar´ odou
r
which quickly dissipates after cure. It exhibits good primerless adhesion to
many substrates and cures rapidly at room temperature when in contact with
atmospheric moisture. This product is not to be recommended for use with
copper and its associated alloys or in electronic assemblies.
Technical Data
AS1500
Mixture
Cure Type
Acetoxy
FDA
No CFR (21] 177.2600
Max Cure at 25°C
7 h
Rheology
Paste
Extrusion Rate
295 g/min
Self Bonding
Yes
Tack Free Time
3 min
Colour
White
Cured product
V
ulcanisate after 7 days at 23°C +/-
2°C and 50% +/-5% humidity
CTE Linear
292 ppm/°C
CTE Volumetric
876 ppm/°C
Duro Shore A
39 ASTM D 2240-95
Working Temp.
-50 - 300 °C AFS_1540B
Tensile
2.4 MPa ISO 37
Elongation
270 % ISO 37
Modulus Youngs
0.75 MPa
Modulus at 100% Strain
1 MPa
Tear
6.1 kN/m
Linear Shrinkage
1 %
SG
1.07 BS ISO 2781
Thermal Conductivity
0.2 W/m*K]
UL 94V-0
No ppm]
AS1500 total pages 3 page 2
Electrical properties
Dielectric Constant
3 1kHz ASTM D-150
Dielectric Strenght
18 kV/mm ASTM D-149
Dissipation Factor
0.0025 1kHz ASTM D-150
Surface Resistivity
3.46E+14 Ohm ASTM D-257
Volume Resistivity
3.21E+15 Ohm*cm ASTM D-257
The above given values are product describing data. Please consult the ‘delivery specification’ for binding product specifications.
Further data about product properties, toxicological, ecological data as well as data relevant to safety can be found in the safety
data sheet.
Storability / Storage
With a proper storage the product will hold for approx. 24 months if stored max. at 40 °C and protected from frost
in a dry place in closed original containers.
Properties
-Fast room temperature cure
-Excellent adhesion to most substrates
-Resistance to chemicals and solvents
Application Technique
Processing
AS1500 is a ready for use 1 component system. If supplied in cartridges, it can be applied using either manual or
pneumatic dosing guns. It can also be applied from bulk containers using conventional drum dosing equipment.
All surfaces to which the sealant is to be applied should be clean, dry and free from grease, dirt, and loose material.
Priming of surfaces is not normally required. If using the product as an adhesive, it should be applied to one clean
surface and the other clean surface brought into contact with it within the tack-free time stated above. For optimum
bond strength, the thickness of the sealant joint should be at least 1 mm.
The sealant will cure upon exposure to atmospheric moisture, ideally between 20 – 30 °C and 40 – 70 % Relative
Humidity.Time taken for cure will depend on the thickness of the joint, humidity and temperature. Joints should be
left undisturbed for at least 24 hours, but preferably longer to effect sufficient depth of cure. Full cure requires 7
days.
For pneumatic dosing of 310 ml cartridges, the recommended pressure is 2.25 to 3.45 bar (40 to 50 psi). Dosing
pressure above the recommended limits may lead to gas bypassing the piston, causing spluttering at the nozzle
and poor bead quality.
It is absolutely important to check the compatibility in preliminary tests if unknown substrates are used.