General Witterings -
Rosy Seeks Help

This is just a quickie - seeking help/advice please.

Rosy has a steel bottom plate.  On the inside of the boat, I want to lay a flat steel plate (about 14 inches square), and to ensure a good thermal contact between this square plate and the bottom plate.

Unfortunately ...

The bottom plate is not dead flat - just where I want/need to put the plate, it seems to be slightly domed, and unfortunately ...

For several good reasons the 14 inch steel plate cannot/must not be bent.

We have considered: 

ONE:  Forming a small dam on the bottom plate just over 14 inches square, and pouring in some molten lead (we have some lead) and then pressing the 14 inch square plate into/onto it.  However, as the bottom plate is sitting in chilly canal water, we think that perhaps the hot lead will solidify before the plate can be pressed into it.

TWO:  The place where the 14 inch square plate is to be located is surrounded by vertical steel plating, so it is possible to flood the space with thin oil, water or anti-freeze.  I don't especially want to do this, as I can see the liquid coolant getting filthily contaminated with waste oil, dust, Fanny-hairs etc. etc.

Then we had a sudden thought.  With all the mastics and pastes that are available, does anybody know if there is a pliable material, that can be moulded into shape, that sets after a while, and which is a good conductor of heat?

Thanks in advance

Toodle pip!!

Bill