OVERVIEW Wacker Elastosil A 4 Screen Printable Silicone Overview Wacker Elastosil A 4 is a one-part, Amine based silicone adhesive used for bonding and sealing. Like Elastosil A 16 Blue, the A 4 product is one part screen printable silicone. This particular silicone has a very long skin over time and cures with carbon dioxide and moisture. Specifications Elastosil A 4 Specifications Typical general characteristics Inspection Method Value Appearance WSTM-219 Red Liquid Viscosity, cP, at 25°C WSTM-2103 21000 Solids (%) WSTM-2288 92 Skin-over Time, min, 25°C with moist carbon dioxide WSTM-2290 5 Skin-over Time, hrs, 25°C, 50% relative humidity, ambient conditions WSTM-2118 8 As Cured (Bead Thickness, 50 100 mil) Hardness Shore A WSTM-1110 50 Tensile Strength, MPa WSTM-1228 2.4 Tensile Strength, psi 350 Elongation at break WSTM 1228 100 % After Fluid Immersion ASTM #1 Oil (70hrs/150 C) Hardness, points change WSTM-1118 -15 Tensile loss, Max % WSTM-1118 -20 Elongation, loss, Max % WSTM-1118 -20 After Fluid Immersion IRM 903 Oil (70hrs/150 C) Hardness, points change WSTM-1118 -30 Volume change, % WSTM-1118 60 Heat Resistance (70 hrs/225 C) Hardness, points change WSTM-1116 10 Tensile loss, Max % WSTM-1116 -25 Elongation, loss, Max % WSTM-1116 -30 DATA SHEETS Wacker Elastosil A 4 Data Sheets Technical Data Sheet Safety Data Sheet (SDS)
