Pro's and cons (if any) of using Waxoil type products in door sills and cavities to prevent corrosion, please.

From my experience it is generally quite good but can block up drain holes and then cause more problems that if fixes.

Also, don't start welding a nearby area just after you have applied it as it very easily sets on fire [guess how I discovered that one!]

Stu

I much prefer dinitrol (others are similar, and way way better than waxoil)
used by all oem manufacturers, and one of the main reasons cars do not rust like they did in the 70's
No downside, except as mentioned above

As above,much better cavity waxes available now than waxoyl.

New ones,like Dinitrol,are much thinner so penetrate into seams etc much better than waxoyl.

I usually tape up drain holes in doors etc before applying,as it runs out everywhere!

Remove the tape a couple of days later

Just keep in mind that if you ever have to do any cutting and welding you will have to wade through the evil stuff.

I've had a can of waxoyl for a few years stuck on the shelf and last time I used it I put some white spirit in to thin it down, this may not be the correct thing to do but it worked, sprayed a lot better.

A mate has just given me a full tin of it for my project so it will get the same treatment.

Another +1 for Dinitrol. The underside of my imported Integra is covered in 4941 and it's still great years on. Funnily enough, TorqueGT swapped using waxoyl for Dinitrol after they'd tried it on mine.

Dynax and other Bilt Hamber products are excellent but expensive.

Most cavity waxes advise re application periodically, I think using Waxoyl in cavities twice as often is as good as using expensive stuff, and works out cheaper.

It is white spirit based so thats the right thinner.

[Edited on 7/10/17 by r1_pete]