Weber Jointseal PU 300 is a one‑component, moisture‑curing polyurethane elastomeric sealant designed for sealing movement joints in precast concrete and for caulking around windows, doors, skirting, walls and floors. It offers non‑sag performance, long‑term durability and UV resistance, and it does not stain marble or granite. The sealant adheres to concrete, metal, wood and stone substrates.
