SPACE INVADER ????

[Blown_FC]

My sills are in pretty good order...I have sucked out all loose dirt and crap inside them, and have sprayed curst converter inside the sills, to convert any surface rust that may still be inside.

To help with avoiding return of rust, I've thought about filling the inside sill cavity with SPACE INVADER...you know...that space filling foam you get from a hardware strore.

My theory, is that this stuff sets hard and is water repellent, so there would be no chance of water or moisture ever entering this cavity again....and hence reduce the amount of rust reforming.

This stuff is also great for sound deadening a hollow spance such as the inside of sills.

Is this a bad idea

your thoughts

Cheers

Mark

[Ed]

it sounds like an OK idea, but im almost certain any area on a car is never 100% water proof.

ID probably go with a wax guard.. or even drill more drain holes.

I actually had my outer sills removed so i painted the inners with POR15, and weld thru paint where welding was performed.

Just a thought.

Cheers

Ed

[Fast_Eddie]

Mark,

I wouldn't try and fill the sill cavity at all. The space invader is like honeycomb with lots of air voids, which I'm sure will hold water and gunk, with disasterous results in the longer term.

You need to make sure the sill cavity is as clean as possible, by ensuring the drain slots are open and free of debris, and then ensure that the metal inside is well coated with a suitable product.

To achieve this I plan to drill 13mm holes in the top of the sill under the door scuff plates at approx 300mm centres, so that I can access the void with the wax guard product, initially when the car is rebuilt, and then say every 6 or 12 months depending on use.

I will put rubber grommets in the holes to prevent water egress prior to replacing the scuff plates.

It would be a similar maintenance program to say, fish oiling the inside of the doors.

Regards

Edward

[Blown_FC]

Thanks for that......I was thinking I may have problems down track, but more along the lines of the space invader getting hot ( from the sun ), and cold, then going brittle, or disintergrating into dust  itself, then it would act like a big sponge

May have to adopt your hole and plug idea.

I have drilled a series of 10mm holes on the underneath ( inside sill ) to act as drain holes, but I may need to plug them up anwyway

Cheers