MONTHLY MAINTENANCE
Polyurethane caulks are so versatile, readily available, and widely accepted and used that in many cases they’ve eclipsed alternative products. That’s unfortunate, because even though polyurethane caulk is terrific, there are times when other formulations, such as polysulfide or silicone, may be preferable.
I briefly mentioned polysulfide de last month (see “A Refreshing Caulk Tale,” September 2016), noting some of its attributes, including resistance to UV light, fuel and many cleansers, and its facility to be sanded and painted. Above all these, however, is its ability to remain flexible for years. Unlike polyurethane, polysulfide doesn’t dry to a hard, eraserlike consistency. It’s therefore ideally suited to applications where it’s exposed to flexing or movement, UV light, deck or teak cleaners, or petroleum products. It’s also ideal for bedding…
