I had a broken tab on one of my hard plastic under dash heater ducts. Other than this broken tab, the duct is in perfect condition. So, I decided to try a hack that I read about. I have attached a few pics of my fix. Heater Duct pre-fix: shows the broken off tab and the mold that I made to form a new piece (I inserted some wire to hold the new plastic filler) Heater Duct pre-fix 1: another picture of the broken tab and mold/form. Heater Duct post-fix: shows the newly molded plastic tab Heater Duct pre-fix 1: another picture of the completed tab. I used a mixture of Baking Soda and Superglue to form the new tab and then just sanded off the form paper. It came out great and is very strong. I was able to reassemble the duct work and am now continuing with my restoration. Hoping someone else can use this information!
Brian, It sets up real quick, but I let it cure overnight before I started sanding it. I would pour in a bit of superglue, add the baking soda, stir it and then repeat the process until I filled the form.
Walter, as far as a "ratio", I would pour in the superglue and then add enough baking soda to completely cover (absorb into) the amount of superglue. Probably worked out to 50/50.
72STAGE1, Yes, the mixture dried kinda opaque, so I matched the black color of the duct and sprayed it black.
