ELASTOSIL® RT 703
ELASTOSIL® RT 703 is a self-levelling, slightly thixotropic, one-part heat-curing silicone adhesive. When applied by serigraphy, it also can be used for surface printing purposes.
Cured ELASTOSIL® RT 703 shows very good adhesion to many substrates and long-term stability against weathering, moisture and UV light. The cured silicone rubber may continuously be exposed to constantly changing climatic conditions, UV radiation and temperatures as high as 200 °C (392 °F) without damage.
Properties
Uncured:
- Slightly self-levelling to non-slump
- Suitable for silk-screen printing
- Fast curing at elevated temperature
Cured:
- Suitable for FIPG and, to a certain degree, for CIPG applications
- recommended service temperature range: -50 °C to +200 °C
Specific features of ELASTOSIL® RT 703
- Electrically insulating
- One-component
- Self-adhesive
- Thixotropic
- UV & weathering-resistant
Data sheets
- Multipurpose glue
- Suitable for silk-screen printing
- Typical fields of application: household appliances, mechanical engineering, glassware and tableware industry.
Preparation:
All surfaces must be clean and free of contaminants that will inhibit the cure of ELASTOSIL® RT 703. 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.
To reduce the risk of bubbles or void formation during curing, ELASTOSIL® RT 703 can be de-aerated prior to use by applying a vacuum of 25-50 mbar for 10-15 min.
Curing:
ELASTOSIL® RT 703 is a one-part heat-curing silicone, the curing time of which is highly dependent on temperature and on both the size and the heat sink properties of the parts to be bonded. ELASTOSIL® RT 703 is usually cured between 140 °C and 200 °C in order to secure a quick build-up of adhesion to the respective substrates. Typical curing temperatures and resulting curing times are given in adjacent table.
Detailed information about processing one-part heat-curing silicones is given in our brochure “ROOM TEMPERATURE VULCANIZING (RTV) SILICONES - MATERIAL AND PROCESSING GUIDELINES”. We recommend running preliminary tests to optimize conditions for the particular application.
Pigmentation:
ELASTOSIL® RT 703 is colourless translucent. If necessary, the product can be pigmented by adding up to 2 wt. % of ELASTOSIL® COLOR PASTE FL via a mixing section of the automatic metering and dispensing equipment.
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 is fully vulcanized. Cured silicone rubber needs to be rubbed off or removed mechanically, if necessary in combination with a swelling agent (solvent) or a chemical silicone remover.
Storage
Store in a dry and cool place.
The 'Best use before end' date of each batch is shown on the product label.
Storage beyond the date specified on the label does not necessarily mean that the product is no longer usable. In this case however, the properties required for the intended use must be checked for quality assurance reasons.
Sales and support
Ann Arbor, MI 48108
United States
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