PU440 Polyurethane Concrete Sealant 1 Pack Non Sag Caulk For Joints Walls Sidewalks Foundations Moisture Cure Elastic Waterproof Expansion Joint Ready Cartridge 10.1 Fl Oz Grey Works Like A Champ In All Weather

PU440 Polyurethane Concrete Sealant 10.1 oz Grey Non Sag
✔️ Non-sag, moisture-cure polyurethane caulk for joints & edges

Donseal PU440 is a moisture-curing polyurethane sealant designed to seal concrete expansion joints, walls, sidewalks, and foundations. It bonds to concrete, masonry, wood, aluminum, steel, and ceramic surfaces, making it ideal for both DIY projects and professional jobs. The material dries to an elastic, waterproof seal and accepts latex and water-based paints after curing.

✅ Broad temperature resilience: -22°F to 175°F for exterior joints
✅ Wide surface compatibility: concrete, wood, gypsum, aluminum, steel, ceramic
✅ Seals dry, wet, and water-filled holes; bonds masonry and stone
✅ Easy to use: 10.1 fl oz cartridge fits standard caulk gun; no pre-mix
✅ Paintable after cure; 365-day shelf life with printed prod/EXP dates

💡 What is a concrete expansion joint sealant used for and how does PU440 perform in outdoor projects?

PU440 provides a tough, flexible seal that blocks water intrusion and handles movement. - Handy for sidewalks, foundations, and walls where joints move with weather.
- Bonds to concrete, masonry, wood, metal, and ceramic surfaces.
- Moisture-curing formula forms an elastic, waterproof seal.
- Paintable after cure for a clean finish in finished projects.