RTU Encapsulant

Identification

Chemical Family

Silicones

RTU Product Type

2K (2 component) Coating,

Radiation Curable Coating,

Conformal Coating,

Potting Compound,

Encapsulant,

2K (2 component) Adhesive

Categories

Markets → Electrical & Electronics → Applications → Devices & Assemblies → Automotive Electronics

Technologies → Ready-to-Use Products → Product Families → Adhesives & Sealants → Encapsulants

Markets → Electrical & Electronics → Applications → Parts & Components → Housings & Enclosures

Technologies → Ready-to-Use Products → Product Families → Paints & Coatings → Other Paints & Coatings

Markets → Electrical & Electronics → Applications → Packaging & Assembly → Potting Compounds

Markets → Electrical & Electronics → Applications → Wire & Cable → Power Transmission & Distribution

Markets → Electrical & Electronics → Applications → Parts & Components → Sensors & Actuators

Applications

Application Area

Sensors,

Electrical Components,

Housing,

Electronic Control Unit (ECU),

Power Control Unit (PCU)

Application Method

Spray

Cure Method

Chemical Cure,

Heat Cure,

Air Dry,

Radiation Cure

Applications & Uses

Application Details

• Surface Preparation
  • All surfaces must be clean and free of contaminants that will inhibit the cure of RTU Encapsulant. 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.
     
• Handling
  • The A-component contains an UV-tracer that is dispersed in the silicone. The UV-tracer may be subject to a limited sedimentation. In order to guarantee homogenous product performance (curing time, UV-tracability) it is recommended to homogenize the A-side prior to application by stirring.
     
• Mixing
  • Component B of SEMICOSIL® 949 UV A/B contains the platinum catalyst, component A the crosslinker. Even traces of the 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.
  • The two components should be thoroughly mixed at a 10 : 1 ratio by weight or volume.
  • To eliminate any air introduced during dispensing or trapped under components or devices a vacuum encapsulation is recommended.
     
• Curing
  • For the curing an UV lamp (Fe-lamp, D-bulb) with an emission between 250 and 350 nm can be used. It is recommended not to use lamp systems that emit light with a wavelength below 250 nm.
  • Curing time of SEMICOSIL® 949 UV A/B is highly dependent on UVactivation.
  • Significant differences in curing time are obtained for curing different layer thicknesses and for using different substrate materials. Typical values are given below.
  • UV-activation Time (sec) Curing time (140 mW/cm²) at 25°C (2mm)
    • 5 sec 2 min
    • 10 sec 1 min
    • 20 sec 40 sec
  • Use of UV-LEDs
  • A cure with UV-LEDs is basically possible, however only under certain specific conditions:
    • 365 nm emssion
    • High-Power UV-LED
    • Minimization of distance Silicone surface to LED
    • Layer thickness < 5 mm (depth of light penetration smaller compared to cure with discharge lamps)
    • Matching of area to be irradiated to UV-LED emission array
       

• UV-activation (140 mW/cm²)	Curing time at 25°C(2 mm)
  5 s	2 min
  10 s	1 min
  20 s	cured after 40 s UV

Applications

• Automotive Electronics
• Connector Encapsulation
• Electrics & Electronics
• Electronic Control Unit (ECU)
• Encapsulation
• Power Control Unit (PCU)
• Power Electronics
• UV active encapsulant
• Sealing of connectors (injection-molded thermoplastics + pins)
• Allows short cycle times by fast solidification of silicone

Features

Ready-to-Use Product Features

Fast Curing,

Good UV Stability,

Low Hardness,

Low Viscosity,

Pourable,

Primerless

Packaging & Availability

Country Availability

Andorra,

United Arab Emirates,

Afghanistan,

Antigua And Barbuda,

Anguilla,

Albania,

Armenia,

Netherlands Antilles,

Angola,

Argentina,

American Samoa,

Austria,

Australia,

Aruba,

Azerbaijan,

Bosnia and Herzegovina,

Barbados,

Bangladesh,

Belgium,

Burkina Faso,

Bulgaria,

Bahrain,

Burundi,

Benin,

Bermuda,

Brunei Darussalam,

Bolivia,

Brazil,

Bahamas,

Bhutan,

Bouvet Island,

Botswana,

Belarus,

Belize,

Canada,

Cocos Islands,

Congo,

Central African Republic,

Switzerland,

Cote D'Ivoire,

Cook Islands,

Chile,

Cameroon,

China (Mainland),

Colombia,

Costa Rica,

Cuba,

Cape Verde,

Christmas Island,

Cyprus,

Czech Republic,

Germany,

Djibouti,

Denmark,

Dominica,

Dominican Republic,

Algeria,

Ecuador,

Estonia,

Egypt,

Western Sahara,

Eritrea,

Spain,

Ethiopia,

Finland,

Fiji,

Falkland Islands,

Micronesia,

Faroe Islands,

France,

Gabon,

United Kingdom,

Grenada,

Georgia,

French Guiana,

Ghana,

Gibraltar,

Greenland,

Gambia,

Guinea,

Guadeloupe,

Equatorial Guinea,

Greece,

Guatemala,

Guam,

Guinea-Bissau,

Guyana,

Hong Kong,

Heard Island and McDonald Islands,

Honduras,

Croatia,

Haiti,

Hungary,

Indonesia,

Ireland,

Israel,

India,

British Indian Ocean Territory,

Iraq,

Iran,

Iceland,

Italy,

Jamaica,

Jordan,

Japan,

Kenya,

Kyrgyzstan,

Cambodia,

Kiribati,

Comoros,

Saint Kitts and Nevis,

North Corea,

Korea,

Kuwait,

Cayman Islands,

Kazakhstan,

Laos,

Lebanon,

Saint Lucia,

Liechtenstein,

Sri Lanka,

Liberia,

Lesotho,

Lithuania,

Luxembourg,

Latvia,

Libyan Arab Jamahiriya,

Morocco,

Monaco,

Moldova,

Montenegro,

Madagascar,

Marshall Islands,

Macedonia,

Mali,

Myanmar,

Mongolia,

Macao,

Northern Mariana Islands,

Martinique,

Mauritania,

Montserrat,

Malta,

Mauritius,

Maldives,

Malawi,

Mexico,

Malaysia,

Mozambique,

Namibia,

New Caledonia,

Niger,

Norfolk Island,

Nigeria,

Nicaragua,

Netherlands,

Norway,

Nepal,

Nauru,

Niue,

New Zealand,

Oman,

Panama,

Peru,

French Polynesia,

Papua New Guinea,

Philippines,

Pakistan,

Poland,

Saint Pierre And Miquelon,

Pitcairn,

Puerto Rico,

Palestinian Territory,

Portugal,

Palau,

Paraguay,

Qatar,

Reunion,

Romania,

Serbia,

Russia,

Rwanda,

Saudi Arabia,

Solomon Islands,

Seychelles,

Sudan,

Sweden,

Singapore,

Saint Helena,

Slovenia,

Svalbard And Jan Mayen,

Slovakia,

Sierra Leone,

San Marino,

Senegal,

Somalia,

Suriname,

Sao Tome and Principe,

El Salvador,

Syrian Arab Republic,

Swaziland,

Turks And Caicos Islands,

Chad,

Togo,

Thailand,

Tajikistan,

Tokelau,

Turkmenistan,

Tunisia,

Tonga,

Turkey,

Trinidad And Tobago,

Tuvalu,

Taiwan,

Tanzania,

Ukraine,

Uganda,

United States Minor Outlying Islands,

USA,

Uruguay,

Uzbekistan,

Vatican City,

Saint Vincent And The Grenadines,

Venezuela,

Virgin Islands, British,

Virgin Islands, U.S.,

Vietnam,

Vanuatu,

Wallis And Futuna,

Samoa,

Yemen,

Mayotte,

South Africa,

Zambia,

Zimbabwe

Regional Availability

• Africa
• Europe
• North America
• Latin America
• Asia
• Oceania

Properties

Properties

• Two-part, 10 : 1 mixing ratio
• Low viscosity
• Extremely fast curing at room temperature (after uv-activation)
• Low hardness (shore 00)
• Offers process control option by uv-light (contains uv-tracer)

Regulatory & Compliance

Certifications & Compliance

EC No.1907/2006,

REACH Exempt (Europe)

Chemical Inventories

DSL (Canada),

ENCS (Japan),

IECSC (China),

PICCS (Phillipines),

TSCA (USA),

TCSI (Taiwan)