por 15 putty

[Kent]

Has anyone tried the POR15 epoxy putty? How would it work to repair a cracked bumper instead of welding or the other typical methods?

[Roch_Greg]

I just finished using my last little bit today, had the tube for a couple of years.

What kind of material is the bumper made out of? To me cracked would be something more in line with plastic (SMC, EDP,PP) but I guess steel could crack as well.

But if it is steel how deep is the crack? The steel will be weak at that point if it's deep enough.

Greg

[Kent]

The bumper is plastic but the info on the product sez it can be used on plastics. I usually weld but thought I would see how versatile this product is.

[Len]

I'm not familiar with POR putty but if it's not a dedicated plastic repair product you'll probably find that the repair will be short lived. We use Fusor 143 along with reinforcing mesh for most flexible plastic repairs, it hardens quickly and lasts as long as the bumper. The link below will show you the proceedure used in many professional shops and can easily be used by any DIYer.

Bumper Repair Link

[Kent]

I have been trying the Fusor 114 putty and have had a horrible time getting it to stick completely esp. on the edges. I think I like the Polyflex better.

[Roch_Greg]

Well I have used the Fusor and Polyflex stuff too and I would go with that as Len suggests. What type of Plastic is it? It's usually stamped somewhere on the un-finished side.

You can PM or call Len and ask for some help with the application. But all things being equal the Fusor should work.

[Len]

I have been trying the Fusor 114 putty and have had a horrible time getting it to stick completely esp. on the edges. I think I like the Polyflex better.

Fusor 114 is plastic finishing adhesive and it quite strong for repairing plastic but it's not as flexible as the 143. We use the 114 regularly and have never had a problem with the edge breaking back. This product feathers nicely into the surrounding material as long as the surface is prepped properly.

Poly-Flex is flexible filler which is excellent for filling gouges in flexible surfaces but is not strong enough to repair breaks where the damage creates a separation in the plastic. The 143 when used with the Fusor 602 Surface Modifier bites and holds VERY well and feathers nicely but we still use Poly-Flex to finish most plastic repairs after we have the plastic strengthened with the 143.

Plastic Repair Materials Link

[jmoffett]

If you're referring to the 2-part putty, it gets very hard and shrinks quite a bit. I don't think it would do well on a plastic bumper.