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RTV Silicone Potting Compounds

MG Chemicals is an authorized master distributor for Momentive RTV silicone products. These silicone rubbers are electrical potting products that offer enhanced thermal protection compared to conventional chemistries, with operating temperatures of up to 200°C. Due to their elasticity and low moduli, silicone potting compounds are also ideal materials for potting delicate surface mount devices, because their use mitigates damage from thermal expansion and contraction. With excellent resistance to moisture and weathering, UV silicones are suited for outdoor lighting, transportation, and aerospace applications.

 

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RTV Silicone Potting Compounds
Clear RTV silicone

Clear RTV Silicone

RTV615 is a two-component clear RTV silicone which cures at room temperature to form a high-strength silicone rubber. Users can speed up cure time by heating the mixture and curing within a few hours. This quick cure silicone comes with curing agent in matched kits, designed for use with a convenient 10:1 ratio by weight.

The cured silicone is optically clear and does not yellow if exposed to outdoor conditions. This property makes RTV615 ideal for outdoor lighting protection such as scoreboards, signage or street lighting. The clarity of the cured silicone does not impede light transmission and adds protection against common outside hazards.

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Clear Silicone

Clear Silicone

RTV12 is a two-component, low viscosity, clear silicone potting compound that cures at room temperature to a soft, pliable rubber. RTV12 will cure in deep sections without additional heating or moisture. It has been designed to achieve primerless adhesion to many substrates, including metals, plastics, and ceramics typically found in electronic assemblies.

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High Temperature Silicone

High Temperature Silicone

RTV60 is a red two-part high temperature silicone. It is supplied ready-to-use with a base compound and DBT (dibutyl tin dilaurate) as the standard curing agent. DBT is suitable for most applications. However, other catalysts are available to facilitate deep section curing, faster cures, and automated mixing.

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High Temperature Silicone Paste

High Temperature Silicone Paste

RTV88 silicone rubber compound is a red, two-part high temperature silicone. This red RTV is a spreadable silicone paste and is supplied ready-to-use with a base compound and DBT (dibutyl tin dilaurate) as the standard curing agent. DBT is suitable for most applications. However, other catalysts are available to facilitate deep section curing, faster cures, and automated mixing.

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Mold Making Silicone

Mold-Making Silicone

RTV630 is a two-component mold-making silicone that cures at room temperature to a high strength rubber. This blue RTV is supplied in a matched kit of base (A) component and curing agent (B) component, designed for use with a convenient 10:1 ratio by weight.

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White Liquid Silicone Rubber

White Liquid Silicone Rubber

RTV11 is a white general-purpose two-part liquid silicone rubber. It is supplied ready-to-use with a base compound and DBT (dibutyl tin dilaurate) as the standard curing agent. DBT is suitable for most applications, but other catalysts are available to facilitate deep section curing, faster cures, and automated mixing.

Read More »
Clear RTV silicone

Clear RTV Silicone

RTV615 is a two-component clear RTV silicone which cures at room temperature to form a high-strength silicone rubber. Users can speed up cure time by heating the mixture and curing within a few hours. This quick cure silicone comes with curing agent in matched kits, designed for use with a convenient 10:1 ratio by weight.

The cured silicone is optically clear and does not yellow if exposed to outdoor conditions. This property makes RTV615 ideal for outdoor lighting protection such as scoreboards, signage or street lighting. The clarity of the cured silicone does not impede light transmission and adds protection against common outside hazards.

Read More »
Clear Silicone

Clear Silicone

RTV12 is a two-component, low viscosity, clear silicone potting compound that cures at room temperature to a soft, pliable rubber. RTV12 will cure in deep sections without additional heating or moisture. It has been designed to achieve primerless adhesion to many substrates, including metals, plastics, and ceramics typically found in electronic assemblies.

Read More »
High Temperature Silicone

High Temperature Silicone

RTV60 is a red two-part high temperature silicone. It is supplied ready-to-use with a base compound and DBT (dibutyl tin dilaurate) as the standard curing agent. DBT is suitable for most applications. However, other catalysts are available to facilitate deep section curing, faster cures, and automated mixing.

Read More »
High Temperature Silicone Paste

High Temperature Silicone Paste

RTV88 silicone rubber compound is a red, two-part high temperature silicone. This red RTV is a spreadable silicone paste and is supplied ready-to-use with a base compound and DBT (dibutyl tin dilaurate) as the standard curing agent. DBT is suitable for most applications. However, other catalysts are available to facilitate deep section curing, faster cures, and automated mixing.

Read More »
Mold Making Silicone

Mold-Making Silicone

RTV630 is a two-component mold-making silicone that cures at room temperature to a high strength rubber. This blue RTV is supplied in a matched kit of base (A) component and curing agent (B) component, designed for use with a convenient 10:1 ratio by weight.

Read More »
White Liquid Silicone Rubber

White Liquid Silicone Rubber

RTV11 is a white general-purpose two-part liquid silicone rubber. It is supplied ready-to-use with a base compound and DBT (dibutyl tin dilaurate) as the standard curing agent. DBT is suitable for most applications, but other catalysts are available to facilitate deep section curing, faster cures, and automated mixing.

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  • Low Modulus – Will not stress delicate components during cure or thermal cycling
  • Wide temperature range – Maintains elasticity between -60 and 200°C
  • Electrically insulating – Will not cause electrical shorts
  • Specialty grades available – Includes flame retardant, thermally conductive, optically clear and low outgassing grades
  • IP protection – Opaque finish ensures IP cannot be stolen by competitors
  • Vibration protection – Dampens light impact shocks
  • Encapsulating SMDs – Elastic, will not stress components
he silicone did not cure

The two main reasons silicone does not cure are the mix ratio was incorrectly applied or the material is not properly mixed. Silicone should not be tacky when fully cured so evidence of this suggests under curing. The first thing to check is whether the individual components are homogeneous as various fillers and pigments can settle out over time. A paint shaker is the best tool to fix this but if not available, take a spatula and scrape it along the bottom of the container. If there’s any buildup of settled material, be sure to break it up and mix it back into the resin. Measure both components by their correct mix ratio as listed in the product technical data sheet then thoroughly mix the two components together for at least 2 minutes.

Can I machine the cured silicone?
Once cured, you can machine the cured silicone to some extent like sanding and polishing.

Can I remove cured silicone?

Silicone is one of the more forgiving resins when it comes to the need for removal. The elastic finish makes it easier to cut out sections if needed; however, this is not practical for full removal. For best results, use a chemical solvent like methylene chloride or acetone to soften the cured product. Care must be taken though as these solvents will eat away at the underlying plastic so monitor closely.

Do I need to apply a primer prior to pouring the mixed silicone?

Some silicones will not strongly adhere to substrates without use of a primer so one is recommended for best results. This is not the case for all grades so please check the technical data sheet for detailed instructions.

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