Running into a snag here finding an adhesive that will work. A plus is that is doesn't have to sit overnight.
The issue is with my Volvo door latch mechanisms. I pried the motor cover off without breaking it by first evenly heating the circumference using a pencil butane torch. I let it heat soak about 15sec, then went at it carefully with a flat screwdriver.
Problem is getting it back together. Tried a Permatex gasket adhesive; no joy. Tried hot glue; it came apart inside the door within a couple of days. Went back with silicone RTV, thoroughly clamped overnight. Had one come apart inside the door. I also discovered I didn't completely seal the entire circumference with silicone. That might have been why.
Turned over the black plastic motor cover and discovered a #2. That's the code for HD-PE. So I've been reading up on PE and PP. Some pretreat with hexane, then use super glue. As a quick test, I tried Hot Stuff (red) CA without hexane or heat, then twisted. It did come apart, but with some effort. Might work with an even bead around a 8" circumference though.
Also read up on first heat treating the area to glue to oxidize it before the adhesive is applied. Inside the groove, it looks like the original sealant was a thin, black bead. Maybe I can flame treat both halves, then clamp them back together until cool. Haven't tried that.
I also found a couple of places where I could drill a small hole straight through both sections, insert a small bolt, like a #4, put a nut on the other end to form a secure mechanical connection. Unfortunately, I can't do this all the way around the perimeter due to part of the other side being obstructed, electrical tracks running through the plastic and internal gears + motor.
This will require a belt + suspenders approach. I can wrap UL-181B duct tape around one long side, plus a diagonal but that's it.
What say the brain-trust?
The issue is with my Volvo door latch mechanisms. I pried the motor cover off without breaking it by first evenly heating the circumference using a pencil butane torch. I let it heat soak about 15sec, then went at it carefully with a flat screwdriver.
Problem is getting it back together. Tried a Permatex gasket adhesive; no joy. Tried hot glue; it came apart inside the door within a couple of days. Went back with silicone RTV, thoroughly clamped overnight. Had one come apart inside the door. I also discovered I didn't completely seal the entire circumference with silicone. That might have been why.
Turned over the black plastic motor cover and discovered a #2. That's the code for HD-PE. So I've been reading up on PE and PP. Some pretreat with hexane, then use super glue. As a quick test, I tried Hot Stuff (red) CA without hexane or heat, then twisted. It did come apart, but with some effort. Might work with an even bead around a 8" circumference though.
Also read up on first heat treating the area to glue to oxidize it before the adhesive is applied. Inside the groove, it looks like the original sealant was a thin, black bead. Maybe I can flame treat both halves, then clamp them back together until cool. Haven't tried that.
I also found a couple of places where I could drill a small hole straight through both sections, insert a small bolt, like a #4, put a nut on the other end to form a secure mechanical connection. Unfortunately, I can't do this all the way around the perimeter due to part of the other side being obstructed, electrical tracks running through the plastic and internal gears + motor.
This will require a belt + suspenders approach. I can wrap UL-181B duct tape around one long side, plus a diagonal but that's it.
What say the brain-trust?
