Insulated Plastic Boiler

[Ciderhead]

no problems with the foam, duck tape didn't like temp though, and crinkled a bit but is still fine.
I would have been better keeping the whole lot in the bucket, although cleaning might be a bit more awkward.

[Shanna]

HI Ciderhead

Might try fire resistant foam

http://www.goodwins.ie/p-414-pur-7-b2-fire-rated-expanding-foam-750ml.aspx

I would also use some bubble insulated foil over the the dried insulation.  I would make it up into a fairly loose cylinder shape and use a staple gun to hold the foil together. I have a staple gun, staples and the foil and could make one up for you if you like.  Just let me know the diameter of your bucket adding on for the insulation. If you find it to lose you could go great guns with the tape over the foil. I have found that the silver metallic tape is perfect for the job as it sticks to the plastic foil better than the plastic tape.

For any body doing extract on a stove top I have found that a lid I is essential to stop heat loss and speed up the time of getting up to boil temperature.

Shanna