Zwicker, I've used both of these on the tent roof (the vinyl not the canvas).
The green stuff you can get at Swish in Whitby and the Hertel can be found at Home Hardware.
2010 Rockwood Roo 23SS
2009 Ford F-150 XLT SuperCrew with Max. Towing
2011 Rockwood Signature Ultra Lite 8293SS, 12K Equal-i-zer
2016 Ford F-250 XLT SuperCrew, 6.2L, 4x4, 6'9" bed, 3.73
2010 Rockwood Roo 23SS (2012 - 2014)
2009 Ford F-150 XLT SuperCrew, 5.4L, 4x4, 5'6" bed (2012 - 2016)