LP-FlexJoint 800
High-Modulus Polyurethane Heavy-Traffic Joint Sealant
Movement Capability: ±25% |
High Abrasion & Chemical Resistance |
Standards: ISO 11600 / ASTM C920
LP-FlexJoint 800 is a high-modulus, single-component polyurethane joint sealant engineered for heavy-traffic concrete floors, expansion joints, and civil engineering substructures. Designed to withstand mechanical impact, vehicular loads, and chemical exposure, it delivers long-term elastic sealing with exceptional tear strength and abrasion resistance.
Key Performance Features
Heavy-Traffic & Tear Resistance
High-modulus elasticity resists puncture, shear stress, and mechanical abrasion from forklifts, heavy trucks, and pedestrian traffic.
Chemical & Fuel Immunity
Formulated to resist fuels, oils, hydraulic fluids, and mild chemical splashes, making it ideal for industrial floors and transport hubs.
±25% Dynamic Joint Movement
Accommodates thermal expansion and contraction in concrete pavements and floor slabs without debonding or cracking.
Substructure Water Barrier
Provides a watertight seal for subterranean joints, water containment structures, and civil engineering infrastructure under continuous pressure.
Technical Specifications
| Physical Property | Technical Value | Test Standard |
|---|---|---|
| Chemical Base | Single-Component Polyurethane | Internal Standard |
| Sag / Flowability | Non-sag (0 mm) | ISO 7390 |
| Movement Capability | ±25% | ASTM C920 / ISO 11600 |
| Shore A Hardness | 40 – 50 | ASTM C661 |
| Tensile Strength | ≥ 2.0 MPa | ASTM D412 |
| Elongation at Break | > 500% | ASTM D412 |
| Tear Resistance | ≥ 12 N/mm | ASTM D624 |
| Service Temperature | -40°C to +80°C | Internal Standard |
Applications & Substrates
Primary Applications
Heavy-Duty Industrial Workshop & Logistics Warehouse Floors
Airport Runways, Aprons & Highway Expansion Joints
Subterranean Structures & Culverts
Water Treatment Plants & Secondary Containment（Precast Concrete Floor Slabs & Parking Decks
Compatible Substrates
Heavy-Duty Concrete |
Precast Pavement Slabs |
Steel & Epoxy Floor Coatings |
Masonry & Brickwork|
Application & Surface Prep Guide
Joint Preparation
Concrete must be fully cured (minimum 28 days old) and dry. Remove all dust, laitance, grease, and former sealant residue using mechanical wire brushing or grinding.
Backing Material & Masking Tape
Insert a suitable closed-cell PE backer rod to set correct sealant depth. Apply masking tape to joint edges to ensure sharp, clean seal lines.
Application & Tooling
Apply LP-FlexJoint 800 using a manual, battery, or pneumatic caulking gun in a continuous motion to prevent air entrapment. Tool immediately with a spatula for tight joint wall contact. Remove masking tape before skin forms.
Curing & Painting
Protect from direct water exposure during initial skinning. Allow 24–48 hours of curing before permitting light foot traffic, and 4–7 days before exposing to heavy vehicular loads.
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