Sikaflex removal

Jan 3, 2013
865
1,198
Mayenne, France
Funster No
24,131
MH
Rapido
Exp
Since 2010
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
 

TheBig1

LIFE MEMBER
Nov 27, 2011
11,397
14,172
Dorset
Funster No
19,048
MH
A class
Exp
many many years! since I was a kid
single edged razor blade or glass scraper is the best way i have found. its not designed to peel off easily
 

Terry

LIFE MEMBER
Dec 27, 2007
11,312
6,790
South yorks
Funster No
1,075
MH
C class
Exp
Since 2001
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
 
Jul 5, 2013
7,278
5,391
Tunbridge Wells
Funster No
26,797
MH
A class
Exp
Since 2013
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
 

JeanLuc

Free Member
Nov 17, 2008
3,305
2,183
Warwickshire
Funster No
4,952
MH
Hymer B630 Star-Line
Exp
Since 2007
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
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.
 

Silver Tourist

Free Member
Dec 3, 2014
4
10
Chester
Funster No
34,413
MH
C class Autotrail Apache
Exp
Since 2012
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.
 

jollyrodger

LIFE MEMBER
Oct 1, 2012
5,924
14,971
Port City Devon
Funster No
23,107
MH
A Class Hymer B574
Exp
Since 1970'ish
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:
Aug 6, 2013
7,498
6,101
Kendal, Cumbria
Funster No
27,352
MH
A Class
Exp
since 1999
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)
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.
 

Techno

LIFE MEMBER
Jul 28, 2010
15,238
17,381
Leeds the one up North
Funster No
12,905
MH
Rapido 7090F 3 litre 160
Exp
May 2010
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.
 

Techno

LIFE MEMBER
Jul 28, 2010
15,238
17,381
Leeds the one up North
Funster No
12,905
MH
Rapido 7090F 3 litre 160
Exp
May 2010
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.
It's not painted on this van but GRP anti hail skin
 
Jan 19, 2013
111
80
Worcestershire
Funster No
24,347
MH
A Class
Exp
since 2010
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.
 

Kevan

LIFE MEMBER
Jan 18, 2014
1,054
911
Kent
Funster No
29,745
MH
van conversion
Exp
30 years caravan/motorhome
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.
 
Jul 10, 2014
986
3,983
the Berwyn Mountains
Funster No
32,350
MH
Hymer S740
Exp
since 2009
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
 
Jul 12, 2013
2,116
1,414
The City of Henlow
Funster No
26,906
MH
Lowline
Exp
Since 1980
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
 
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