ckerr
Part of things
Posts: 257 
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As the title,
A friend managed to "let there roof box fly" off there car roof damaging it.
It has cracks along the rear and a hole where a piece of plastic is missing.
There request is purely to make it water tight and it doesnt have to be pretty.
So I plan on basically tiger sealing another piece of plastic behind the cracks and clamping it all together until dry.
However this still leaves the indent of the hole... is there something I can fill the indent with (it will be backed with a piece of plastic) some sort of flexiable filler maybe? which would at least allow it to be painted or wrapped on the rear half to least look half way presentable?
Many Thanks,
Chris
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Some fibreglass sheeting and resin you want, can get small kits in halfords  |
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can you cut a piece of plastic to the same size as the hole and then plastic weld it from the rear using an old soldering iron. (insert obligatory do it outside, don't breath it in warning here)
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fad
Posted a lot
Posts: 1,781
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Gaffa tape over back of hole, and fill it with tigerseal on front, smoothed off with (gloved) finger. Will sand down with electric sander too. Repaired my pu splitter like that with piece missing.
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Roof boxes are very thin plastic. I'd go for a fibreglass repair from the inside. Tape on the outside, then build it up follwing the instructions on the inside of the box.
Tigerseal sticks like poo to a blanket face on, but it's not good for sticking edges together.
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1968 Cal Look Beetle - 2007cc motor - 14.45@93mph in full street trim
1970-ish Karmann Beetle cabriolet - project soon to be re-started.
1986 Scirocco - big plans, one day!
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fibre glass p60 and filler mixed 50 50 sets like kevlar easy to sand , bridge behind it , as you stated ,
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ckerr unless the box is made from fibreglass repairing with fibreglass wont work... You need to find out what plastic it is as fad says and use the repair methods applicable for that materiel...
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fad
Posted a lot
Posts: 1,781
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Indeed. Resin based products won't stick to lots of plastics. Plastic welding only works on plastics that are thermoplastics. Some can be repaired chemically, some with adhesive, and some the only thing that will work is mechanical repairs (that is, rivets, bolts, patches of material, and sealing with a caulk of some sort - plumbers mate works well).
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50 50 mix works well used in body shops, to fix and repair plastic bumpers, grills, metal body panels , and on beach buggies etc ,
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fad
Posted a lot
Posts: 1,781
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50 50 mix works well used in body shops, to fix and repair plastic bumpers, grills, metal body panels , and on beach buggies etc , Bumpers are usually thermoplastic olefins. Polyester fillers, resins etc all adhere well to steel. Beach buggy shells are always fibreglass (resin painted onto glass bandage). All of those examples respond well to epoxy, resins, and other similar products. But... Not all plastics behave the same way. Some will melt, others will burn. Some will glue with contact adhesive, some need a solvent. Some will melt with chemical interaction, some are chemically inert. |
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ckerr
Part of things
Posts: 257
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I will check out the plastic numbers when I receive the roof box, friends havnt dropped it around yet.
Will keep everyone informed.
Many thanks,
Chris
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Roof Box RepairDeleted
@Deleted
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Aug 10, 2017 22:19:29 GMT
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unless its a huge or specialist box then I'd cut my loses and buy another one, you can get second hand one cheapish.
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