Wacker Elastosil® E43 Silicon 310 ml Catridge

ELASTOSIL® E43 TRANSPARENT is a self levelling, one-component acetoxy-cure silicone rubber which cures at room temperature under the influence of atmospheric moisture.

It shows excellent mechanical properties, has good adhesion properties to many substrates. In particular used as adhesive on cured silicone rubber

Properties

• moderately self-levelling
• excellent adhesion on cured silicone rubber
• high-tear grade
• recommended service temperature from -45 °C to +180 °C
• max. recommended short term peak temperature exposure 200°C

Specific features

• Excellent mechanical properties
• Good adhesion to metals, glass and ceramics
• High elongation
• High tear-resistant
• Ready to use
• Solvent-free

Technical data

Properties Uncured
Property	Condition	Value	Method
Color	-	transparent	-
Density in water	20 °C	1.09 g/cm³	DIN EN ISO 2811
Viscosity, dynamic D = 0.5, 1/s	25 °C	250000 mPa·s	ISO 3219
Viscosity, dynamic D = 25, 1/s	25 °C	175000 mPa·s	ISO 3219
Skin formation time ( at 23 °C / 50 % r.h)	-	10 min	-
Curing time	23 °C | 50 % r.h	12 h/mm	-
Properties Cured
Property	Condition	Value	Method
Density in water	23 °C	1.10 g/cm³	DIN EN ISO 1183-1 A
Hardness Shore A	-	30	ISO 7619-1 / 23°C / d = 6, mm
Tensile strength ( Type 3 / 23°C / 2mm)	-	6.50 N/mm²	ISO 37
Elongation at break ( Type 3 / 23°C / 2mm)	-	500,00 %	ISO 37
Tear strength	-	11.5 N/mm	based on ASTM D 624 B / 23°C / t = 2 mm

 

Applications

• Appliances Industry
• Bonding, Fixing & Sealing
• Industrial Adhesives
• Appliances Industry
• Small Appliances
• Aerospace
• Small Appliances

Application details

Multipurpose sealant and adhesive for general industry and electronics for FIPG applications. Particularly suitable as
adhesive on cured rubber or silicone coated textiles like seam sealing.

Processing

ELASTOSIL® E43 is a ready-to-use, one-part silicone rubber which starts curing when exposed to air moisture. Typical
curing characteristics are given in the table "Properties Uncured".

As RTV-1 silicones require humidity for curing, free access of air moisture to the silicone rubber is essential. Additionally, the
vulcanization time of ELASTOSIL® E43 can be greatly reduced by increasing the level of air's relative humidity. Please note
that, unlike the initial skin formation, the total curing rate of RTV-1 silicones is limited by moisture's diffusion speed in
silicone rubber.

As increasing the curing temperature has just a minor effect both on the skin forming time and the curing speed,
ELASTOSIL® E43 typically is vulcanized at room temperature. Heat curing is recommended only for applications where the
silicone rubber is applied as a thin film (thickness less than 0.5 mm), because otherwise blistering is likely to occur due to
the quick release of acetic acid.

After completion of the vulcanization the silicone elastomer may continuously be exposed to constantly changing climatic
conditions, UV radiation and high temperature without damage. Cured ELASTOSIL® E43 usually shows good primerless
adhesion to many substrates, e.g. glass, ceramics, metals, plastics and powder coatings.

Removal: If removal of the silicone from machines or dispensing equipment is necessary, white spirit or similar nonpolar
solvents are recommended. However, cleaning ideally should take place before the silicone rubber is fully vulcanized. Cured
silicone needs to be rubbed off or removed mechanically, if necessary in combination with a swelling agent (solvent) or a
chemical silicone remover ELASTOSIL E43 shows good primerless adhesion to many substrates. We recommend running
preliminary tests to optimize conditions for the particular application.