CHT AS1821 RTV, silicone adhesive sealant

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CHT AS1821 RTV, silicone adhesive sealant
Categories:	Polymer; Thermoset; Silicone; Silicone, RTV, Adhesive/Sealant Grade
Material Notes:	Description: This is a non-corrosive, neutral cure, 1-part, RTV (Room Temperature Vulcanizing) silicone adhesive sealant. It is one in a range of Acetone cure products which are solvent free. It exhibits excellent primerless adhesion to many substrates and cures rapidly at room temperature when in contact with atmospheric moisture to form a tough rubber. This product will not corrode copper or its alloys and is suitable for use with electronic components. Key Features Fast room temperature cure Non corrosive Low linear shrinkage Self leveling Application: Applications include shallow potting of electrical connectors in automotive Cured Product: 7 days at 23+/-2°C and 50+/-5% humidity Information provided by CHT Group
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Physical Properties	Metric	English	Comments

Density	1.07 g/cc	0.0387 lb/in³	BS ISO 2781
Brookfield Viscosity	20000 cP	20000 cP	Mixed
Storage Temperature	<= 4.00 °C	<= 39.2 °F

Mechanical Properties	Metric	English	Comments
Hardness, Shore A	27	27	ASTM D2240-95
Tensile Strength	0.848 MPa	123 psi	ISO 37
Elongation at Break	200 %	200 %	ISO 37
Tensile Modulus	0.000400 GPa	0.0580 ksi	Young's
100% Modulus	0.503 MPa	73.0 psi
Shear Strength	0.343 MPa	49.7 psi	Lap Shear Stainless Steel; ASTM D1002
	0.579 MPa	84.0 psi	Lap Shear Aluminum; ASTM D1002
	0.637 MPa	92.4 psi	Lap Shear Copper; ASTM D1002
Tear Strength	2.98 kN/m	17.0 pli	BS ISO 34-1

Electrical Properties	Metric	English	Comments
Volume Resistivity	5.40e+15 ohm-cm	5.40e+15 ohm-cm	ASTM D-257
Dielectric Constant	2.88	2.88	ASTM D-150
Dielectric Strength	>= 20.0 kV/mm	>= 508 kV/in	ASTM D-149
Dissipation Factor	0.0050	0.0050	ASTM D-150

Thermal Properties	Metric	English	Comments
CTE, linear	302 µm/m-°C	168 µin/in-°F
Thermal Conductivity	0.200 W/m-K	1.39 BTU-in/hr-ft²-°F
Maximum Service Temperature, Air	220 °C	428 °F
Minimum Service Temperature, Air	-50.0 °C	-58.0 °F

Processing Properties	Metric	English	Comments
Cure Time	10.0 min	0.167 hour	Tack Free Time / Skin Formation
	1440 min @Temperature 23.0 °C	24.0 hour @Temperature 73.4 °F	3mm Depth
Shelf Life	12.0 Month	12.0 Month

Descriptive Properties
Appearance	Viscous liquid
Color	Black
Cure type	Acetone
Rheology	Flowable
Self Bonding	Yes
Volume Coefficient of Thermal Expansion	906 ppm/°C

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PCHTSIL033 / 314516

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