Hi just after some advice on 3m sealer the stuff in bag mix how many 250 ml bags would you recommend to do a underneath Sierra sapphire to give factory look coverage ? and would I do just the areas like floor pans and chassis legs with this and normal car colour on other areas like boot floor and tunnel archs etc ? Or what areas should I use this for ? Or would it be better to do the whole lot underneath with 3m Thanks

 

It's a very good sealer to use for underbody and wheel arch protection, but to do an entire sapphire it will cost a small fortune! You would need at least one bag per arch and a fair few to cover the floor. I would argue it's one of the best products out there so it depends how far you want to go with it.

Don't use it to cover any mounting areas but otherwise I'd use it everywhere else. It's also overpaintable I seem to remember.

 

Thanks for that I was thinking of doing the floor pans and rear archs and under wheel well and the outer sides and back of boot floor and chassis legs and possibly half way up the cills just don't want to order to many or not enough there Ł15 a bag would you think 10 of these would be enough ? Thanks again

 

I've just done an Escort Cosworth and used the 3M stuff on chassis rails, inner sills and floor pans and used 14 sachets. Everything else I coated in Upol Raptor

 

Its bloody good stuff but expensive we use about 30 plus bags on a average resto at work.

 

Good stuff but very expensive. A good alternative is u-pol raptor.

 

Thanks for that just thinking of the best options how much did you use of the raptor stuff and I take it that stuff is good aswell ? Does it go hard or rubbery ? and will it react with anything I've used etch primer on the bare metal and used sikaflex -221 on the seams for seam sealer
Thanks

 

Sorry to jump the thread I'm about to use this in my Frs this week what primer did you all use under it my floor is bare metal at the moment and I'm not sure to just use etch or etch then 2k prime it first?

 

Etch then 2k primer is fine.

 

I used 4 litres of Raptor as well as the 3M stuff, I bought tintable Raptor as I'm not too keen on black floors unless it's a black car. It dries hard but with a rubbery feel to it whereas the 3M stuff is more rubbery if that makes sense.
I doubt it will react with Sikaflex tbh and etch primer is fine or it has been for my application.

Don't forget the 3M stuff is grey so you'll need to factor in over painting.

Ebay is best for both the 3m stuff and the Raptor.

 

Thanks for your help really appreciate it 👍🏼

 

The black raptor can be over painted Iv just done
A mk2 escort it's not very thick tho so good prep is key

 

How many litre do you think will I need to do the underside? Thanks

 

I used a 4ltr kit on a mk2 did arches as well

 

Thanks mate I've ordered 8 litres already so I guess that will be plenty lol I'll have to do my focus aswell cheers though really appreciate it 👍🏼