Once it gets warmer, I have to glue a replacement drivers side mirror. Theres a plastic backer plate on the mirror assembly and I assume the back of the replacement mirror will be plastic or mirror glass.

I have some JB Weld Quick on hand. But not sure if this would be ideal since I have premix it and apply to a about a 8 inch area.

I would like to make this repair in the cold if that has an bearing on setting time and material used.

what do you suggest?

 

So is there glass or no glass currently on the drivers side ?

Assuming plastic sub-frame with no glass............

The last time I remounted a replacement mirror I used 3M body side molding tape. It's double sided with excellent glue. Clean the plastic frame and the back of the new mirror with lighter fluid.

I wouldn't use anything that gets hard as it will crack. You need to use a good silicone based adhesive like GE silicone II

Household Goop would work good. Amazing GOOP Adhesive Products

 

Shattered glass. It will be removed and I will affixed directly to the backer plate the old glass was attached too. Im unclear if the replacement mirror will be mirror on both sides or another material on the backing of the mirror.

Someone else mentioned silicon based... SO I think that's what I need.

Funny you mention GOOP, I have some of this stuff, still fresh:
AG All Purpose Product Information 0709

Although that's not silicon based I don't think....

Also its like 0-20 degrees all week.... will my repair work in these conditions?

 

Locktite Rearview Mirror adhesive.

 

Most glues/silicones need somewhat warmer temps to cure. Check the instructions on the tube.

 

I went with a liquid nails brand silicon sealent that says it for extreme temperatures and their was no temp restriction in the directions like other brands I saw. Seeing the driver for this vehicle needs the mirror for safe operation I am giving it a shot.

Its about 10 outside now. Its in the garage overnight and I wrapped the mirror in fiberglass insulation (I doubt that will have an effect)....

 

A little electric warming pad around the mirror would have helped.

 

A hair dryer would have been good to warm the glass and epoxy.