ELASTOSIL TC 3808 A/B

RTV-2 Thermally Conductive Encapsulant
ELASTOSIL TC 3808 A/B is a pourable, 1:1 two-component thermally conductive silicone rubber Battery
cylindrical cell potting material & encapsulant that vulcanizes at room temperature and accelerates on heat.

Properties
• Two-part system, 1:1 mixing ratio.
• Easy to mix and pour.
• Room temperature curing but accelerates on application of heat.
• Excellent durability

Specific features
• High Shore A hardness
• Good thermal conductivity (approx. 1.0 W/mK)
• No post curing required.
• Excellent reliability over a wide range of temperature
• Aids heat dissipation
• Flame retardant in accordance with UL 94 V-0, as per internal test protocol
• Excellent reliability over a wide range of temperature -50° to 180°C.

Technical data
General Characteristics

Application details

ELASTOSIL TC 3808 A/B thermally conductive encapsulant is suitable as a potting material for:
• EV Charger potting
• Power modules
• Adaptors
• Inverters
• Transformers
• Ballasts
• Sensors
• Electronic control units

Processing

Important
Only A & B components with the same batch number may be processed together!

• Application methods
Manual or automated needle dispense

• Mixing and deairing
The product is supplied for 1:1 mix ratio. Prior to use carefully mix the individual components as both of part A & B can
have filler settlement in the bottom. Mixing of individual components has to be carried out till all the settled fillers mixed up
uniformly.
Component A of ELASTOSIL TC 3808 A/B contains platinum catalyst. Component B the crosslinker hydrogen. Even traces
of platinum catalyst may cause gelling of the component containing the crosslinker. Therefore tools (spatula, stirrers etc)
used for handling the platinum containing component or the catalyzed compound must not come into contact with this
component.

• Curing
ELASTOSIL TC 3808 AB, the silicone encapsulants may be either room temperature or heat cured. Room temperature
cure encapsulants may also be heat accelerated for faster cure.
The reactivity can be adjusted within wide limits by adding catalyst OL or inhibitor ViP5 to suit the processing requirements
of the particular applications. Catalyst OL increases the reactivity i.e. pot life and curing time are reduced. Inhibitor ViP5 is
a pot life extender and prolongs pot life and curing time.

• Cleaning
If removal of uncured silicone rubber from machines or dispensing equipment is necessary, white spirit or similar non-polar
solvents are recommended. However, cleaning ideally should take place before the rubber is fully vulcanized. Cured
silicone rubber can be removed by mechanical means, preferably in combination with a swelling agent (solvent).

• Notes
Examples of inhibiting contaminants are sulfur containing materials, plasticizers, urethanes, amine containing materials
and organometallic compounds – especially organotin compounds. If a substrate’s ability to inhibit cure is unknown, a
small-scale test should be run to determine compatibility.

• Storage
ELASTOSIL TC 3808 AB has a shelf life of at least 8 months when stored between 5°C and 30°C in the originally sealed
container. But shelf life can be extended based on the storage condition of the material. The ‘Best use before end’ date of
each batch appears on the product label.

Detailed processing instructions are given in our brochure “ROOM TEMPERATURE VULCANIZING (RTV) SILICONES – MATERIAL AND PROCESSING GUIDELINES