How many tubes of sikaflex ?

[nutbox]

Hi mm
It is to replace the old crud ,is this good practice or does the whole top need to come off?

[Pwag20]

I forgot to take a pic when I did the first side. Took a quick on of the second side (but they both looked pretty much the same):

[Plasticman]

Hi mm
It is to replace the old crud ,is this good practice or does the whole top need to come off?

No. if you get the old crap out as ^^^^ then I would mask the hitop side and also the gutter, well half of it wioth a couple of layers the n a fgood pass makinbg sure you get it ni9ce and even and importantly it gets under the roof as far as is practical.
mm

[Oldiebut goodie]

People lose sight of the fact that in most cases it's the sealant/adhesive that holds the roof on the van! If the bond has disintegrated it makes more sense to strip it and re-apply from the inside rather than just a smidgen squirted in along the outside edge to prevent water ingress.

[Plasticman]

Errr you may do it with a smidgen but thats a bodge, re read what i put and you can lift the van up by the roof ,if the roof is secured to the van yet has a small leak then local seal will suffice, I will stand to be corrected but this is how i been doinbg them for more years than i care to remember, (not all vw of course)
mm

[vanzai]

Hi Guys, Can I ask what you used to chip /scrape / dig out the existing stuff? Thanks!

[BOXY]

Sharp, pointy things

[Pwag20]

Sharp, pointy things

Ha ha. I was scared to confess to using a screwdriver in case Mike told me off

[Oldiebut goodie]

Very sharp and stiff (ooeerrr ) spatula. Failing that I have a 2 1/2 inch wood chisel for the things that anger me! (You can chop out one heck of a mortise with that)

[vanzai]

ok sharp pointy things ordered and on the way

Which variant of Sikaflex do you use (which number)? Thanks

[Oldiebut goodie]

I use Soudaflex 40fc.

[Pwag20]

I used sikaflex 221

[kentishvanman]

Hi,
The biggest problem I encountered was once I had cleaned out the old sealant was waiting for the moisture that had seeped in to dry/evaporate.
Hotair gun or hair drier helps. Most adhesive/sealants have to be applied to dry surfaces.
Don