On Sun, 11 Sep 2011 08:02:51 -0700 (PDT), "
wrote:

On Sep 11, 10:52*am, dpb wrote:
On 9/11/2011 9:44 AM, millinghill wrote:

Hi.
I've lots of that black foam rubber pipe insulation, but it's for 1/2"
diameter. *The (cold water) pipes I need to insulate are 1". *I want
to insulate them to prevent consdensation in my basement. *If I split
two of them down the middle, it will cover the 1" pipe. *But what do I
seal/glue/tape it with? *Duct tape will just get old and unstick after
a few months/years. *Any ideas?
Advice appreciated.
Thanks
Theodore.

Spray foam (automotive) adhesive

--

Given the cost of similar insulation at HD, I would not
go through the trouble of trying to join two split pieces.
Just not worth it. Buy the 1" ones.

I was thinking the same thing. Lots of work for little money, and by
the time all the glue/tape is purchased, why bother. Give or sell the
1/2 inch stuff to someone else and buy what you need.

In a normal house, the cold water pipes are 3/4 inch (Inside Dia).
You didn't say if you have copper, plastic or galv steel pipe, but be
sure to get the right size. You could have actual 1 inch ID pipe, but
my bet is it's 3/4 inch.