We looked long and hard to find the very best roof sealant that will stay put when other sealants give out. Today’s best sealants for outdoor use are tri-polymers; these greatly outperform synthetic rubbers, silicones, tar- and bitumen-based sealants, urethanes, and acrylics., Geocel 2300 Clear is a tri-polymer, and it will stick to just about anything, can be applied at below-freezing temperatures (through it gets hard to work, keep the tubes warm), can be applied to damp surfaces, and is good for 50 years under outside UV exposure. Best of all, it costs the same as many of the older products. Geocel 2300 used to be sold under the Proflex brand name in Canada. The two are identical, and from the same factory. This is the sealant to use for rooftop solar installations. Nothing else comes close! Features Superb adhesion to just about any surface, including asphalt shingles Can be applied from -18C through 60C, even on damp surfaces Service temperature -40 through 82C Excellent elongation: Over 1000% Will not dry out or crack – ever! Superior UV resistance 50-year service life! Crystal clear Paintable
