3MFactory-Match Seam Sealer, 08323, Black Color, Two-Part, Medium/High Viscosity Urethane, 200 mL/6.75 fl oz Cartridge

Works great and have no concerns with longevity or durability. That said make sure you’re completely ready, masked off, rags handy etc. This sets up fast and doesn’t self level. It is thick “heavy bodied” like advertised. I used this one because I had some verticals and horizontals I was worried about and they will be visible after painting. Once I laid down enough sealer spread and smoothed it with my finger. Once it was all laid down and I removed the masking tape it would not feather out from the tape line. After 5-10 minutes (when it has a skin) with a wet (spit in my case) finger this sealer is easy smoothed the rest of the way with feathered edges without tape lines. Pics are of a K5 Blazer drip rails and header area. All things considered I will definitely buy again when needed.

I used this for sealing drip rails on a Ranger... very pleased with the results. It does self level quickly and evenly and looks great. I used about 1/2 of the 200ml tube for both sides and probably put in quite a bit more than the factory did...but one tube would easily do both drip rails on a full size truck I think. Since it is self levelling you must dam up the ends with masking tape and make sure the surface itself is level... and plan to grind out some of it on the ends, easily done with a small file. Overnight cure is better, the data sheet says paintable within a short period but it was still a bit tacky after an hour... rock hard the next day and very easy to finish the ends.

Very easy to use. Great product for body panel replacement

Great pricing

Another great product from 3M. You won't go wrong with this product

Not sure about self-leveling, was expecting something more "fluidy", the viscosity and stickiness is just like honey and as a matter of fact - as epoxy :). It's likely great glue for gluing separate pieces, but not great for filling voids, due to low viscosity and high stickiness. The nozzle with the cartridge is bulky and exponentially grows with the gun, so not great for tight spaces. The proprietary gun is another story for itself...Should have gone with a smaller package with a thumb applicator instead...

great product

Great

Works as described and cheaper that jobber price