Ratings & Reviews for Sika NP1 10.1-oz Exterior and Specialty Aluminum gray Paintable Advanced sealant Caulk

What Customers Are Saying

Customers overwhelmingly praise this caulk for exceptional durability and long-term performance, with most reporting years or decades of reliable use without cracking or losing flexibility. Reviewers consistently highlight its superior sealing ability across demanding applications like roofing, windows, and masonry work, even in extreme weather including intense heat and freezing temperatures. Many appreciate its paintability and smooth application, though some note a strong odor lasting up to 24 hours and occasional workability challenges. A few report issues with product freshness or hardened tubes. Overall, most customers consider it a trusted, go-to solution they'll never replace.