One‑Component Construction Polyurethane Sealant for Heavy‑Duty Infrastructure Sealing

Longvictor Chemical is pleased to introduce LH680 Construction Polyurethane Sealant, a high‑performance one‑component, moisture‑curing non‑sagging elastic polyurethane sealant developed for demanding construction and infrastructure projects.

Formulated for both indoor and harsh outdoor working conditions, LH680 stands out with outstanding elasticity, high tear resistance and excellent weather‑proof & waterproof performance. It can operate stably within a service temperature range from ‑40℃ up to +90℃, making it well‑suited for bridge, tunnel, culvert, hydraulic engineering, roofing, underground structures and sanitary facilities.

LH680 delivers an 805% elongation at break with tensile strength reaching 2.7 MPa, which allows the sealant to accommodate significant joint movement without cracking or debonding. The zero‑sag property ensures vertical and overhead application with no slumping. After full curing, the sealant is paintable and shows good compatibility with most paint systems, bringing extra convenience for subsequent finishing work.

Other core features include:

• Neutral curing, non‑corrosive to most substrates, pollution‑free

• Non‑toxic and anti‑mildew performance for sanitary‑related joints

• Superior abrasion resistance and tear strength

• Excellent durability, weathering and water resistance

• Ready‑to‑use single‑component formulation; no on‑site mixing required

• Ready‑to‑use single‑component formulation; no on‑site mixing required

Wide Application Scenarios

LH680 works reliably on concrete, epoxy, natural stone, quarry tile, metal and many other substrates. Typical uses cover: ‑ Expansion & connection joints for concrete floors, stair‑wall transitions and machinery installation gaps ‑ Roof, gutter and pipe duct sealing ‑ Water tanks, containers, silos and bolted lap joints ‑ Bridge, tunnel, culvert and hydraulic project joints ‑ Prefabricated construction joint sealing and draught‑proofing ‑ Sanitary facility sealing jobs

Packaging Options

LH680 is available in two popular formats to match contractor requirements:

1. 600 ml sausage pack: 20 pieces per carton; Colors: White, Black, Grey

2. 310 ml cartridge: 25 pieces per carton; Colors: White, Black, Grey

Shelf‑life is 12 months when stored unopened in original packaging under dry conditions below 25℃.

Complete TDS, SDS documents and product samples are available upon request for global distributors and contractors.

For further information about LH680 or our full sealant portfolio, please visit www.kwsealant.com or contact our sales team.