ELASTOSIL® RT 707 W is a flowable one-part heat-curing silicone for potting and coating applications.


Cured ELASTOSIL® RT 707 W 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 230 °C (446 °F) without damage.



  • High extrusion rate
  • Flowable
  • Fast curing at elevated temperature



  • medium hardness
  • recommended service temperature range: -50 °C to +230 °C
  • UL 94 HB listed

ELASTOSIL® RT 707 W的特殊性能

  • 低粘度
  • 单组分
  • 电绝缘性
  • 耐热性
  • 耐紫外线性和耐候性
  • 耐蒸汽性
  • 自粘性



  • Multipurpose potting and coating grade
  • Typical fields of application: household appliances, automotive and mechanical engineering


All surfaces must be clean and free of contaminants that will inhibit the cure of ELASTOSIL® RT 707 W. 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 eliminate any air introduced during dispensing or trapped under components or devices a vacuum encapsulation is recommended. Alternatively, ELASTOSIL® RT 707 W can be de-aerated prior to use; applying a vacuum of 25-50 mbar for 10-15 min is recommended.



ELASTOSIL® RT 707 W 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 components being potted. ELASTOSIL® RT 707 W is usually cured between 140 °C and 200 °C in order to secure a quick build-up of adhesion to the respective substrate. 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.



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.


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.


Wacker Chemicals (China) Co.,Ltd.
Caohejing Hi-Tech Park
200233 Shanghai
+86  21  6130-2000 (电话)
+86 21 6130-2500  (传真)
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产品 技术数据
Shore density A Breaking strength 断裂伸长率 Tear-growth resistance
ELASTOSIL® RT 705 42[1] 42[1] 3.2 N/mm²[2] 3.2 N/mm²[2] 180 %[3] 180 %[3] - -
ELASTOSIL® RT 706 35[1] 35[1] 2.0 N/mm²[2] 2.0 N/mm²[2] 200 %[3] 200 %[3] 2.8[4] 2.8[4]
ELASTOSIL® RT 707 W 42[1] 42[1] 3.0 N/mm²[2] 3.0 N/mm²[2] 180 %[3] 180 %[3] - -
ELASTOSIL® RT 708 42[1] 42[1] 3.2 N/mm²[2] 3.2 N/mm²[2] 200 %[3] 200 %[3] 8.5[4] 8.5[4]
[1] Shore density A | DIN ISO 48-4,  [2] Breaking strength | ISO 37 type 1,  [3] 断裂伸长率 | ISO 37 type 1,  [4] Tear-growth resistance | ASTM D 624 B