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The 1/4 inch butyl cord I received was good quality and appeared fresh. It was a round cross-section "cord", and not a flat tape. The butyl cord was very flexible and sticky, but not so sticky that it would not let go of your fingers. I applied it at about 70F degrees and kept it out of direct sun so it would not get too soft. I used the cord to seal around the base of some outdoor wall lights that did not fit snuggly to the wall. It worked great. I could push and pull the butyl cord into shape to fit the crack between the light base and the wall. Should provide a good seal from weather.

Ya know, for a $10 item, this sure worked like a $30 product! I used it on my 2 rear doors for 2008 Honda Fit Sport where the prior Butyl tape had worn down and was allowing water into the vehicle. Took me 2 hours per door for the whole process, but was well worth it. This worked like a charm -- was easy to apply, is lasting quite well, and holds true to its purpose.

Works just like 3M butyl sealant except it as costly!!!!

Fantastic stuff! I used this to seal around speaker frames. It is very tacky but molds very easily. I had on nitrile gloves and had no issues with it sticking to my gloves. It made a really good seal. It will thin out quickly if you pull against a part that is stuck down already. I found the best method was to lay it out where I wanted it then kinda smashed it in the gap and worked it around the frame. It is tacky enough it stayed put while I worked it in place. Would highly recommend

This "rope" is a bit narrower than the 3M product. I wasnt doing a windshield seal, just door panel seals. So, narrower is just as effective, but with less bulk and mess.