Mk1 heater

[whistler]

What's best to seal the case on a mk1 heater when reassembling? I have tiger seal, non-setting mastic or ordinary silicone.

[AndyPen]

I used non setting mastic as per the original. As it was a NOS unit it still hadn't set, so I just reused it.

[whistler]

I used non setting mastic as per the original. As it was a NOS unit it still hadn't set, so I just reused it.

That's fine. I have some so that's sorted. Thanks.

[Peter Laidler]

Am I missing something here? Mastic in the steel Mk1 type heaters? I thought it was screwed together and where necessary, had that water absorbent spongy rubber stuff in and around the insides, where necessary. And while I've stripped one or two (not many though) I've not seen the mastic but have seen plenty of that rusty guts and rusty coloured spongy rubber stuff

Where does the mastic fit in? Sorry for sounding so un-knowlegeable......

[AndyPen]

Am I missing something here? Mastic in the steel Mk1 type heaters? I thought it was screwed together and where necessary, had that water absorbent spongy rubber stuff in and around the insides, where necessary. And while I've stripped one or two (not many though) I've not seen the mastic but have seen plenty of that rusty guts and rusty coloured spongy rubber stuff

Where does the mastic fit in? Sorry for sounding so un-knowlegeable......

When I opened up a new export one, still sealed in its bag, there was black sealant along the edges where the side screws on to the main body Peter. It was so malleable that I rolled it into a ball and refitted it before the sides went back on. There wasn't a lot by the way, just enough to make a better seal.

I can't find a photo, but I did take one of all the sticky stuff used to seal it up all these years.

heater still sealed up.jpg

[Hipwell]

As Andy says the back mating edges on the sides of the unit have a black non setting dum dum type seal.

Closest new product I've seen is 3M 08578.

[Peter Laidler]

Yep, ain't seen it but fully understand now. We used to use stuff called ARBORSEAL in a tube for sealing screen edges, strips of stuff called PRESTIKON, used to waterproof Centurions for wading in deep water, which only came in a deep grey finish and remained pliable and a stuff called LUTING for sealing binoculars and compasses.

Thanks all.......

[360gts]

All of the heaters I have seen have a white color mastic....this is what I use....it also works great on the lower front side window chrome rail.
https://www.ebay.co.uk/itm/281836331514 ... R7TRhtroYA

[Ronnie]

The black was used on early Landrover (two piece) windscreens. It is used a lot when installing ducting.

[whistler]

All of the heaters I have seen have a white color mastic....this is what I use....it also works great on the lower front side window chrome rail.
https://www.ebay.co.uk/itm/281836331514 ... R7TRhtroYA

Mine was black and just like a bead you'd draw out.

[whistler]

Yep, ain't seen it but fully understand now. We used to use stuff called ARBORSEAL in a tube for sealing screen edges, strips of stuff called PRESTIKON, used to waterproof Centurions for wading in deep water, which only came in a deep grey finish and remained pliable and a stuff called LUTING for sealing binoculars and compasses.

Thanks all.......

I used to use the black rubber sealant called Sealastic (not sure of the spelling) which used to come in a toothpaste type tube. Mainly used on windscreens. Your Arborseal looks to be the modern equivalent. The squeeze tube was very handy as you didn't need a gun to apply it.