Does Sikaflex conduct electricity





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  1. #1
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    Default Does Sikaflex conduct electricity

    I need to set some electrical components into a housing that needs to be very robust, but also waterproof, and able to flex ever so slightly.

    I was considering using sikaflex, but I am not sure if it conducts electricity, because if it does, that could be a problem. We are working with 3 volts and microampere currents by the way

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    Default Re: Does Sikaflex conduct electricity

    Silicon is a semiconductor yes.
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    Default Re: Does Sikaflex conduct electricity

    As far as I am aware, sikaflex is a polyurethane and therefore does not conduct electricity
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    Default Re: Does Sikaflex conduct electricity

    If you are uncertain, get hold of RS Components or AMT Composites and buy an electrical potting compound.
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    Default Re: Does Sikaflex conduct electricity

    Potting compound is actually made of polyurethane (so is Sikaflex...)

    http://www.mantech.co.za/ProductInfo.aspx?Item=90M0104
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  7. #6
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    Default Re: Does Sikaflex conduct electricity

    Quote Originally Posted by jelo View Post
    Silicon is a semiconductor yes.
    Silicon is a semiconductor, silicone is a sealant.

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  9. #7
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    Default Re: Does Sikaflex conduct electricity

    Sikaflex is not conductive.
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    Default Re: Does Sikaflex conduct electricity

    Thanks for the responses so far.

    I have realised that silicone, or sikaflex for that matter isnt going to work, even if Sikaflex is not conductive.

    I can individually insulate all the components well enough to get around the conductivity issue. But I need a pretty large quantatity. (the mould is about the size of a small bread tin), and that amount of silicone will cost a lot. (Unless someone knows of well priced bulk silicone)

    I am back at looking at epoxies again. I need something that wont get too hot in the curing process though. Nothing more than about 15 or 20* above ambient will be okay.

    Any suggestions?

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    Default Re: Does Sikaflex conduct electricity

    Quote Originally Posted by faniedup View Post
    Silicon is a semiconductor, silicone is a sealant.
    Silicone is a beautiful enhancer.

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  14. #10
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    Default Re: Does Sikaflex conduct electricity

    Try these guys.
    Not sure if they are near your home town. The website is not cellphone friendly but I buy my silicone for moulding from them.
    https://alliedfibreglass.co.za/?s=Si...t_type=product

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    Default Re: Does Sikaflex conduct electricity

    Quote Originally Posted by RPiet View Post
    Thanks for the responses so far.

    I have realised that silicone, or sikaflex for that matter isnt going to work, even if Sikaflex is not conductive.

    I can individually insulate all the components well enough to get around the conductivity issue. But I need a pretty large quantatity. (the mould is about the size of a small bread tin), and that amount of silicone will cost a lot. (Unless someone knows of well priced bulk silicone)

    I am back at looking at epoxies again. I need something that wont get too hot in the curing process though. Nothing more than about 15 or 20* above ambient will be okay.

    Any suggestions?
    What on earth are you trying to do or accomplish.

    I canít even begin to imagine from your explanation.
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    Default Re: Does Sikaflex conduct electricity

    Perhaps block bitumen will work? Very reasonable in cost, very effective at correct temp. range.

    We used to make our own waterproof joint housings for km's of farm pump/borehole cables with the stuff, and it worked wonders.

    You can buy large bagged blocks of it (from ABE/CHRYSO), which you melt down to pourable consistency -not sure of your possible working temperature range - but you should find full data sheets on their website.
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  18. #13
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    Default Re: Does Sikaflex conduct electricity

    Quote Originally Posted by RPiet View Post
    Thanks for the responses so far.

    I have realised that silicone, or sikaflex for that matter isnt going to work, even if Sikaflex is not conductive.

    I can individually insulate all the components well enough to get around the conductivity issue. But I need a pretty large quantatity. (the mould is about the size of a small bread tin), and that amount of silicone will cost a lot. (Unless someone knows of well priced bulk silicone)

    I am back at looking at epoxies again. I need something that wont get too hot in the curing process though. Nothing more than about 15 or 20* above ambient will be okay.

    Any suggestions?
    https://www.amtcomposites.co.za/prod...ubber/tin-cure
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    Default Re: Does Sikaflex conduct electricity

    Quote Originally Posted by Patrick L View Post
    Perhaps block bitumen will work? Very reasonable in cost, very effective at correct temp. range.

    We used to make our own waterproof joint housings for km's of farm pump/borehole cables with the stuff, and it worked wonders.

    You can buy large bagged blocks of it (from ABE/CHRYSO), which you melt down to pourable consistency -not sure of your possible working temperature range - but you should find full data sheets on their website.
    The very same stuff used in the large 11kva and larger cable joints. Best option for your application indeed. Heat it up in the tin bucket with a gas stove.

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    Default Re: Does Sikaflex conduct electricity

    Have you considered cold-cure Polyurethane?
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    Default Re: Does Sikaflex conduct electricity

    So potting in large volumes has it's own challenges as compounds in large volumes will generally crack or exotherm which leaves a non homogenous product.

    Google "electrical potting resins" these have fillers to prevent shrinking and cracking. They are available locally through Elite. Right thing for the job, always best.

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