Exterior & Specialty Caulk

Exterior & Specialty Caulk keeps water, air, and UV out of gaps around windows, doors, siding, masonry, and roofs, helping you prevent leaks, drafts, rot, and costly repairs. The right caulk improves energy efficiency, quiets rattles, blocks pests, and delivers a cleaner, finished look that lasts through seasons of sun, rain, and freeze‑thaw cycles.

Choose formulations tuned to your project. Silicone caulk offers top-tier flexibility and weather resistance for glass, metal, and non‑porous surfaces, though most types are not paintable. Polyurethane caulk delivers strong adhesion to wood, masonry, and concrete, is paintable, and stands up to movement and abrasion. Acrylic latex caulk is easy to tool and clean up with water, making it ideal for siding, trim, and paint‑ready joints. Hybrid and elastomeric options blend paintability with long-term elasticity. Specialty picks include butyl rubber for gutters and flashing, self‑leveling sealant for horizontal concrete cracks and expansion joints, high‑temperature formulations for chimneys and roof penetrations, marine‑grade caulk for docks and hulls, and masonry or stucco repair sealants with textured finishes.

For durable results, start with sound surface prep: remove failed material, clean and dry the joint, and size the gap with a backer rod where needed. Cut the nozzle at a 45° angle to match joint width, apply a steady bead with a caulk gun, then tool immediately with light pressure for full contact. Respect temperature and humidity ranges, allow proper curing time, and follow paint windows on paintable caulk. In damp or coastal climates, look for UV‑stable, mildew‑resistant formulas.

Match the caulk to the substrate and movement, check service life and ASTM ratings, and buy enough tubes for continuous beads. With the correct exterior caulk and smart application, your seals stay tight, your finishes stay sharp, and your building stays protected. Save time, reduce callbacks, and boost curb appeal today.