An exterior sealant cartridge appears in my van-building supplies.
The featured Amazon option is DAP Dynaflex Ultra Black Sealant.
Where it fits my build
I removed the factory roof covers, widened the mounting holes and scraped the paint and adhesive from the landing-pad areas. I then fitted the landing pads and assembled the side rails, crossbars and fairing.
The sealant timing made the assembly messy. I applied it early and got it on my hands and parts, while the installed pads left little space for reaching underneath with the nozzle.
Black sealant around a roof-rack landing pad during my installation.The close working space around one of the rack attachments.
My build notes
The access around the pad was the memorable part of this job. Small spaces between the roof, pad and rail affected how I could position the sealant and tighten the hardware.
The order of assembly changed which parts of the joint I could reach.
Alternative products
Two alternatives to compare
Dynaflex Ultra and Dynaflex 230 provide two DAP sealant options. ALEX PLUS provides an acrylic-latex caulk format, with color and formulation differences across the three cartridges.
DAP Dynaflex 230 White Sealant
Dynaflex 230 is a white elastomeric sealant for joints around trim, windows and doors. This Amazon option comes in a small squeeze tube.
