Superglue trick for plastic repair

Just repaired my dog gate with the superglue and baking soda trick I found on the tube of you.

my first try so not the best but so far I am impressed.

I look forward to trying this and the other combinations in the future.

I have found that DAP primer helps with super glue repairs. But I also use the liquid supe glue instead of gel type. The gel type stays IMO flexble. The baking soda should firm up the area 

http://www.theoldone.com/archive/manifold-fabrication.htm

As used in intake manifold prototyping.

You can use the same process with saw dust for wood repairs. Best to use sanding dust from the project for small chips, makes a better color match.

I believe the baking soda primarily accelerates the curing, but adding some graphite (pencil on sandpaper) in addition to the baking soda supposedly creates an even greater increase in strength. Even if not true, it's also a better visual match on gray and black plastics.

I tried this one out recently on a cheap plastic trim piece whose mounting tab broke off. It's holding up well so far.

If you can wrap thread around a repair area,  multiple times, then soak it in CA, the resulting joint is incredibly strong. We use it all the time joining carbon fibre rod to make these:

In reply to Appleseed :

You sent me down a tangent.
I wonder, can you use fully liquid CA (not the gel kind you get in most stuff these days) to turn newspaper into uber paper-mache?

In reply to Mr_Asa :

Trabant? 

You two are talking about a simple fiber/epoxy composite.  The neat thing about baking soda is it is not just a filler solid, a chemical reaction with the superglue takes place.

If you're playing with CA just make sure not to drip any anything cotton or wool, that stuff gets hot! I've had a pair of jeans leave a mark on my leg in the past.

How has your dog gate held up ?

Is the idea to make a paste out of it with the glue and baking soda?

jfryjfry said:

Is the idea to make a paste out of it with the glue and baking soda?

Yes, it turns it into a sorta epoxy that's quite hard and very useful. I mix it up on a bit of aluminum foil and use popsicle sticks or toothpicks to apply it.

Dang, this would have been good to know a while back when I was trying to repair the crappy GM plastics in my girlfriend's Saturn... I'll be stashing this one away for future use

JB Weld makes an epoxy kit specifically for plastic now. I used it to repair an impossible-to-find ABS knob on my vintage 60's Eico integrated tube amp and I was super impressed. 

If you want cheap accelerator, breathe on it. Moisture speeds drying.

In reply to MyMiatas :

By screws into the door frame. This was done to the door latch after it broke.

ShinnyGroove (Forum Supporter) said:

JB Weld makes an epoxy kit specifically for plastic now. I used it to repair an impossible-to-find ABS knob on my vintage 60's Eico integrated tube amp and I was super impressed. 

I used the jb plastic weld to fill in the distributions of my 96 Miata bumper cover before painting from the factory front license plate.  It worked really well.

Who's going to be the first to slowly make fender flares. 

WonkoTheSane said:

jfryjfry said:

Is the idea to make a paste out of it with the glue and baking soda?

Yes, it turns it into a sorta epoxy that's quite hard and very useful. I mix it up on a bit of aluminum foil and use popsicle sticks or toothpicks to apply it.

When using super glue the baking soda creates a chemical reaction that hardens the glue almost instantly. Like your fingers :0)