Sikaflex removal

Discussion in 'Top Tips & Tricks' started by Scattycat, Aug 12, 2014.

  1. Scattycat

    Scattycat Funster

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    I've just got my new satellite system and need to remove the old Sikaflex from the roof of the van.
    Any ideas of the best way to do this?

    Thanks
     
  2. TheBig1

    TheBig1 Funster Life Member

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    single edged razor blade or glass scraper is the best way i have found. its not designed to peel off easily
     
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  3. pappajohn

    pappajohn Funster Life Member

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    Remove the biggest part with a scraper or craft knife blade then finish off with a pencil araser.

    Not tried it myself but did find it as a tip somewhere or other.
     
    Last edited: Aug 12, 2014
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  4. Terry

    Terry Funster Life Member

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    Hi I have a sharpened 3 ins scraper and a piece of wire with handle s on to cut loose what ever if you cannot get the scraper to do it ---a bit like a cheese wire
    terry
     
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  5. tonyidle

    tonyidle Funster

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    I used a very sharp broad wood chisel (very carefully!) :cautious:
     
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  6. peterc10

    peterc10 Funster

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    You can buy silicone remover from places like screfix and B&Q. Not sure how well it works on Sika because never had to use it
     
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  7. JeanLuc

    JeanLuc Funster

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    Sikaflex is not made from silicone, in fact it is specified as silicone-free, so a silicone remover wll not touch it. Both Sika 221 and 512(Caravan) are made from polyurethane. According to the product data sheets, once cured, the only way to remove it is 'mechanical' - i.e. cut it off.
     
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  8. Silver Tourist

    Silver Tourist

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    Firstly it will probably make more of a mess than it already is , if you remove it mechanically it will more than likely chip the paint off the roof panel.
    Secondly , I suggest you leave it alone , after all no one except you will ever see it on the roof and if you sell it you would be very unlucky to find a buyer that makes an issue of it.
     
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  9. jollyrodger

    jollyrodger Funster Life Member

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    As previous I use a very sharp old wood chisel ...delicately .residues can be cleaned with cloth white spirit and small amount of acetone ,re-sica with new unit clean new residue excess with white spirit jobs a good-un and of course a bit of elbow grease(y)
     
    Last edited: Dec 3, 2014
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  10. tonyidle

    tonyidle Funster

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    The point about a very sharp wood chisel as opposed to a craft knife is that if used ground face down you get very good control over how far above the surface you are cutting (a bit like woodwork really :whistle2:). It takes a few attempts to get close to the roof surface but it's easy & doesn't do damage.
     
  11. Techno

    Techno Funster Life Member

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    Rapido has a anti hail coat that is not flat unfortunately it's like a herring bone pattern for want of a better description. Personally I would get it as flat as possible and put a large square plate over the whole area that will make a better foundation for the new sat.
     
  12. Techno

    Techno Funster Life Member

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    It's not painted on this van but GRP anti hail skin
     
  13. iceclimber

    iceclimber Funster

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    I agree with the sharp wood chisel method ….. have had lots of experience removing sikaflex from boats and less so from motorhomes. For the final removal of the residual excess etc …. I have always used cellulose thinners. (this may also remove any colour from the substrate material however) but on the roof unlikely to be a problem.
     
  14. Kevan

    Kevan Funster Life Member

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    Ditto: the wood chisel wider the better; removed my solar panels with cheese cutter wire (easy to buy car windscreen fitters use it to remove old screen) then bought cheap chisel from BQ
    removed all residue without scratching paint, final clean with lighter fuel and clean cloth.
     
  15. f6c

    f6c Funster

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    Do you have to remove it? What about a paint over?
     
  16. Glandwr

    Glandwr Funster

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    Watched a Spanish dealer take some off last month. He was using a especially sharpened 3inch wide paint scraper that he periodically honed. Driving it gently, flexed flat, with a mallet he made short work of it and left almost the original surface. It was so sharp that you could have shaved with it.

    Dick
     
  17. rosalan

    rosalan Funster

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  18. Techno

    Techno Funster Life Member

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    Good Alan but be aware it is only for removing "uncured" adhesive
     
  19. rosalan

    rosalan Funster

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    I noticed that but people continued referring to the same product as part of a cleaning process, perhaps it takes a long time to cure right through.

    Alan
     
  20. Techno

    Techno Funster Life Member

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    Full curing takes place within 24hrs
     
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