Cantedvalve 128 Report post Posted November 23, 2018 What is that stuff? Butyl? Quote Share this post Link to post Share on other sites
mustangstofear 608 Report post Posted November 23, 2018 That's to keep water out :) Quote Share this post Link to post Share on other sites
Cantedvalve 128 Report post Posted November 23, 2018 Right, I understand the function, but what is it though? I hope it is butyl, cause that is what I got. Quote Share this post Link to post Share on other sites
mustangstofear 608 Report post Posted November 23, 2018 We use 3M ribbon caulk. Quote Share this post Link to post Share on other sites
Mike65 475 Report post Posted November 23, 2018 IIRC from when I worked at the new car dealers the black stuff is butyl sealer, & the gray stuff is like MTF stated is 3M ribbon caulk. Quote Share this post Link to post Share on other sites
Cantedvalve 128 Report post Posted November 23, 2018 I got some butyl windshield sealer ribbon and used that on the taillights. Worked fine. Thanks for the info. Quote Share this post Link to post Share on other sites