foxy99
Posted a lot
Posts: 1,391
Member is Online
|
|
Mar 30, 2011 22:58:23 GMT
|
|
How do you replicate it?
Everyone seems to luv to scrape it off but what do you replace it with?
Hammerite/Tetrosyl Underbody seal doesn't seem to dry..it remains tacky and its hard to build up a decent thickness.
That brown waxy stuff from Bilt Hamber and Dinitrol is more like a cavity spray.
There are verious others but I can't seem to replicate the finish of any of the vehicles I've had.
My Imp & Jag seem to have a hard black bitumen coating whilst my Vauxhall Royale seems to have a grey rubbery coating in the arches etc.
I had a Polo which had something similar to the Royale but also had waxy substances on the underfloor.
|
| |
1974 Daimler Double-Six VDP
1965/67 Hillman Imp pick-up
1984 VW Polo breadvan
1970s Yamaha Twins (4)
1976 Honda SS50ZK1
|
|
|
|
OEM UndersealBenzBoy
@benzboy
Club Retro Rides Member 7
|
Mar 30, 2011 23:09:22 GMT
|
|
Schutz is the closest I've found. It's preferable apply it with a gun but I've used a brush quite successfully. It still doesn't replicate that thick rubbery stuff that the manufacturers use but it's still decent. Various brands are available, I think I used Tetrosyl from a local body shop suppliers.
|
| |
|
|
|
|
|
Mar 30, 2011 23:29:16 GMT
|
|
My preference is for Dinitrol 4941 (the waxy brown stuff is 3125 or something) applied with a schutz gun (get it properly warm, and use a beefy compressor). It doesn't set completely, but it does form a hard skin.
When I restore my (various) cars, I will use a marine-type epoxy primer (like Rustbuster's Epoxy Mastic) followed by 4941. I might put some stonechip in between the primer and the underseal in the wheelarches to help protect against, erm, stonechips.
The cavities will get rust converter (where there's old steel with possible surface rust) followed by either Bilt-Hamber Dynax or Dinitrol cavity wax.
TBH, the rubbery stuff isn't great - once rust does set in it lifts and holds water against the steel. Not ideal. The bituminous stuff seems ok, although I suspect that more modern underseals have superior performance. I suppose it depends whether or not you want originality or not though.
|
| |
|
|
OUTRUN
Part of things
13...
Posts: 620
|
|
|
|
|
U Pol Gravitex?
I'm about to use U Pol Raptor truck bed liner. I have been advised it is the business when used in an underbody protection way.
|
| |
I need your help to get back to the year 1985.
|
|
rld14
Part of things
Posts: 351
|
|
|
|
Do what I did, buy old Vauxhalls, they used special invisible rust protection  |
| |
88 BMW E28 M5
62 Vauxhall Velox
60 Vauxhall Velox
60 Lincoln Premiere Coupe
60 Lincoln Continental Mark V Convertible
54 Ford Customline Fordor
32 Ford Roadster
|
|
|
|
|
|
|
Do what I did, buy old Vauxhalls, they used special invisible rust protection 100% protection against invisible rust! Sadly, not so great against the more normal visible rust. |
| |
|
|
|
|
|
|
|
You need to spray, not brush, to duplicate OEM thickness of underseal. A decent sized compressor is needed as a lot of air is required to spray stuff the viscosity of tar  Also remember manufacturers apply to brand new metal that has never seen road salt, rust, etc so they don't need to use a covering that has antirust properties like we'd put on a restored etc vehicle. Personally I use Waxoyl "Black Wax". Stone chip is good but as others say if water gets underneath then you can have a rotten panel that still looks good until you press hard  Paul H |
| |
|
|
dan
Part of things
Posts: 589
|
|
|
|
That's what I've used and I've been well impressed with it. Applied with a shultz gun it gives a orange peel effect while a bit of thinners smooths it down a bit. |
| |
|
|
|
|
|
|
|
The problem is people go for underseal type products like waxoyl and the rubberized stuff manufacters use is really a stone chip product. 3M do a really really good stone chip, but you need a special 3M gun to use it and its horrendously expensive. But it does look great, and comes in a little bag that you pop the seal in to mix the product with the hardener and the unique gun means you bin the nozzle with the bag and the gun stays clean. It perfectly recreates the finish on sills of modern VAG stuff. U Pol Gravitex? I'm about to use U Pol Raptor truck bed liner. I have been advised it is the business when used in an underbody protection way. Raptor is a fantastic product. The black seems a little thicker than the tintable though. Gives a nice texured finish too which is handy for doing sills etc. |
| |
|
|
