They are excellent all-weather caulks that can also be used in wet indoor locations, primarily around tubs and shower stalls. However, because silicone is expensive and offers poor tear and abrasion resistance, it's not a good choice in high-traffic areas. Except in water-based versions, this family of caulks is unpaintable and difficult to tool. Just like polyurethane varnishes, this family of caulks and sealants is superdurable. Abrasion and tear resistance are superior to silicone, and the caulk is highly adhesive, waterproof and flexible.
Shrinkage is minimal, and most polyurethane formulations can be painted or stained.
Tooling is messy and difficult, and you need to clean up with solvent. Today's Homeowner, a division of Times Mirror Magazines. Privacy policy .