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Hightop roof sealant
Posted: 26 Apr 2025, 13:05
by crazyhorse
Hi guys,
The beading in between the hightop and vehicle body needs to be renewed.. any suggestions what I can use? I used silka 522 but it’s coming off and now there is a lovely space for water to enter..


Re: Hightop roof sealant
Posted: 26 Apr 2025, 17:03
by Alfredo
How did you get the old stuff out?
Was it difficult?
Re: Hightop roof sealant
Posted: 26 Apr 2025, 17:40
by Oldiebut goodie
I would say that it was poor preparation that has led to failure - you must clean, clean, clean and then use something to remove all traces of oil/grease etc, I use acetone. There is no sign of adhesion there.
If someone has used silicone previously to seal it you will never get a polyurethane sealant/adhesive to grip without great attention to removing all traces of it which is very difficult.
Re: Hightop roof sealant
Posted: 26 Apr 2025, 18:23
by Robsey
That was my thought.
Contaminated surface.
Sikaflex is usually very good as a sealant or bonding medium.
A good degreaser is needed.
I used to love genklene or trichloroethane.
That would clear your nasal passages and dissolve your brain at a thousand paces.
But bloody good at cleaning without leaving a residue.
I could be a mile off, but would brake cleaner spray not do a similar job.
Re: Hightop roof sealant
Posted: 26 Apr 2025, 18:32
by Oldiebut goodie
Most probably as it is mainly acetone in those sprays but acetone is a lot cheaper.
Re: Hightop roof sealant
Posted: 26 Apr 2025, 20:01
by crazyhorse
Alfredo wrote: ↑26 Apr 2025, 17:03
How did you get the old stuff out?
Was it difficult?
Far to easy, just pulled off
Re: Hightop roof sealant
Posted: 26 Apr 2025, 20:04
by crazyhorse
Ok, so I need to remove it all and clean with acetone ? Is the 522 the right product?
Re: Hightop roof sealant
Posted: 26 Apr 2025, 20:37
by Robsey
On a good clean surface, it sticks like $#!7.
So definitely more than good enough for your intended use.
Re: Hightop roof sealant
Posted: 27 Apr 2025, 08:22
by crazyhorse
Brilliant will get on it
Re: Hightop roof sealant
Posted: 25 May 2025, 11:52
by shampooefficient
A good alternative is Tigerseal. Same applies, needs a thorough clean, but it's especially good at sticking anything to anything.
Being a hamfisted oaf, for me it's usually "index finger" to "middle finger" or "hand" to "lovely clean kitchen cupboard" mind you.
If cleaning something with acetone, I pinch Woman's makeup cotton pads and use them, they're ideal.
Re: Hightop roof sealant
Posted: 26 May 2025, 19:45
by Plasticman
We use a lot of Purflex its a p/u base comes in black,white,grey,we bond ally panals to race cars with it and as other have pointed out clenliness is a must
mm