Which glue for pipe insulation (presumably polyurethane) against wood?

[TRJBerg]

As a headline. Have googled but didn't get a hit. Probably because it's uncommon. (Searched for polyurethane against wood.)

So which glue can work? (Outdoors.)

 

[Matti_75]

A little more explanation about what you're going to do and with what, and you might get more responses. There are different pipe insulations

 

[TRJBerg]

A little more explanation about what you are going to do and with what, and you might get more answers. There are different types of pipe insulation.

As far as I understand, it is polyurethane. It was purchased just over a year ago as pipe insulation, but I can't check that now. But it's dark gray and feels like it.
I can't provide more than that. So the pipe insulation and that it should be glued to wood (possibly also metal).
(The purpose is to seal against an old door in a pump house. That is, against the frame.)

 

[Matti_75]

Try gluing with expanding foam

 

[TRJBerg]

Try gluing with foam sealant.

I probably misunderstood the material, it should probably be polyethylene foam!

So does foam sealant glue to polyethylene foam?

 

[Johan Gunverth]

I've sworn over that before. Polyethylene foam is basically impossible to glue just like regular polyethylene. The glue needs to be flexible once it has dried. The only thing I found that worked was classic solvent-based contact adhesive. Glue both sides, let them dry completely, and then join them. Keep in mind that contact adhesive bonds immediately, so you have one (1) chance to place it correctly. It’s advantageous to rough up the plastic before gluing.

Possibly, 3M No.74 spray adhesive could work. However, it's extremely expensive.

 

[TRJBerg]

I've cursed over that before. Polyethylene foam is basically impossible to glue just like regular polyethylene. The glue needs to be flexible when it has dried. The only thing that I got to work was classic solvent-based contact adhesive. Glue both sides, let it dry completely, and then assemble. Keep in mind that contact adhesive grabs immediately, so you have one (1) chance to place it correctly. It's an advantage if you roughen up the plastic before gluing.

Possibly 3M no.74 spray adhesive could work. However, it's insanely expensive.

I have indeed ordered that adhesive. And it's expensive...
But there seems to be no alternative. Except some kind of heat treatment ("welding"?).
Had I thought about this, I might have chosen another solution. Though it would have taken longer, like building a new threshold/frame plus other insulating material. This was the quickest measure.

 

[Johan Gunverth]

I actually ordered that adhesive. And it's expensive...
But there doesn't seem to be an alternative. Except for some kind of heat treatment ("welding"?).
If I had thought about this, I might have chosen another solution. But it would have taken longer, like building a new threshold/frame plus other insulation materials. This was the quickest measure.

3M 74 is often used when splicing polyether padding in furniture. Same softness as the material, but very strong.