Sikaflex/Silicon sealer removal

Discussion in 'Motorhome Chat' started by pappajohn, Jun 2, 2014.

  1. pappajohn

    pappajohn Funster Life Member

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    always has me beat.

    I need to remove quite a lot of sikaflex AND silicon sealer from a dimpled (same finish as medium sandtex masonary paint) fibreglass finish.....could even be paint.

    The sika/silicon is quite thick...maybe 4mm to 5mm in places

    The dimpled finish CANNOT be damaged.

    With care i may be able to cut back the depth to a thin skin but then need to remove that skin.
    Any usable suggestions welcome.
     
  2. mentaliss

    mentaliss

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    hot air gun, when you get to the 'skin' use a ordinary pencil rubber eraser ( yea like the ones you used at school):Smile:
     
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  3. pappajohn

    pappajohn Funster Life Member

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    thanks...ill give it a try :thumb:
     
  4. Serendipitous

    Serendipitous Funster

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    Hi Pappajohn.

    Not tried the stuff myself, but would be very interested to hear from anyone who has? There is a product called silicon eater or similar.

    I googled it and there are a number of suppliers. Also found this link to Utube which might help.


    [ame="http://www.youtube.com/watch?v=TZ7x6Lcml1Y"]http://www.youtube.com/watch?v=TZ7x6Lcml1Y[/ame]
     
  5. TheBig1

    TheBig1 Funster Life Member

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    silicon sealant is massively different to sikaflex, which is polyurethane based. nothing will disolve it without damaging the surface its bonded to. it needs to be manually removed by cutting off the majority then peeling the remaining skin where possible using a hot air gun with care
    thats why bonding with sikaflex is to be considered a permanent fix

    silicone selant lets go easily and can be dissolved with solvents
     
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  6. NickNic

    NickNic Funster Life Member

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    This worked quite well for me to remove Slikaflex. It isn't as effective as it is on silicon but if you use a lot and leave it for 3 or 4 hours is softens the Silka enough so you can peel it off. I managed to get rid of quite a bit without damaging the surface
     
  7. Ridgeway

    Ridgeway Funster

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    Hi PJ,

    I build and re-build a lot of aquariums which often involves cutting out old silicone which is mostly structural grade and very similar to Sika in consistency. For this I use an old fashioned razor blade to cut out the bulk and some times a cheese wire. OK In my case it's hard to scratch the glass so your surface will be more delicate but to remove the bulk this may help.

    Afterwards I just use some C2HC13 to clean it back to a bear surface
     
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