how to fix plastic?

i am werkin on my grill right now and i noticed that wen i took it off my truck it had a crack, so i figured no big deal ill put fiberglass behind it to hold it in place because im goin to ise fiberglass anyway. today when i was werkin on it i noticed that it let go. there is no chips in it its just a crack right up front so how can it fix this? is there any plastic repair kit i could get or should i use super glue that i could knock down after it dries?

unfortunately,plastic is sort of like glass. Once you break it,even if you repair it,it'll never be the same and look all bodged up,unless,depending where the crack is,there is enough room to use fiberglass and or bodyfiller,and it'll end up being like patching a metal body panel. WAY more work than it's worth imo.

your best bet is probably just get a new grille. I have 2 for sale right now. I have a regular stock grille,in good shape,which is painted grey,and a rare 4x4 grille,in decent shape,just needs some sanding and repaint. Sounds like you're making a custom grille anyways. I can ship one up to you,shouldn't cost you very much. I can get you pics of both if you like.

you can pick up a plastic welding kit, and weld 'er up and sand it, mud it prime it and paint it... i realize your grille might not be painted now, but you'd prolly have to paint it after the repair to make it look good

u can use two part epoxy for plastic

urethanesupply.com thats where I get all of my plastic welding supplies.

i just bought some stuff, i think its called plastic weld, but it comes in a black 2 tube container with a plunger on top to squeeze out containts. you then have to mix it and then spread it. it stinks real bad. has anyone seen it and how good does it werk?

the shop I worked in had all of the equipment to weld plastic, its very cool, actually it uses a heated strip bead lol
and we had special fillers, we fixed a lot of skidoo and quad parts.

prep involved removing any paint or decals grinding out a valley in the crack (on the back side of the part) then torching all of the "hairy" plastic residual stuff from the grinding, then chemical adhesion prep, then layin down what looked like hot red rope licorice, filling in the valley.
There were different types for different plastics.

I did not perform this work myself the shop went under before I got into it.(boss took the money and ran)

Identifying the type of plastic is crucial to gluing and getting a good result, you need the glues to fuse the part together, not eat it all up, the grille is prolly a polystyrene, Gravity5 prolly knows?

abs is easier plastic to deal with, it has flex to it and usually makes up interior parts, ploystyrene is difficult it melts and dissipates real fast!!

ABS,PC-ABS,and PP (Polypropelene I think) are generally what I worked with when I was molding interior parts for GM and DCX. All the reflectors and lenses were Lexan.

There was a chart with all the proper names for the plastics but I don't remember them all,I just remember going by the short forms on the scrap bins and what code was molded into the parts.

how did u mold them?