Direct Factory Supply · Model PU-24

PU-24 Elastic Polyurethane Wood Floor Adhesive

1-component permanently elastic polyurethane flooring adhesive for engineered timber, solid hardwood, and parquet planks. 100% solvent-free with acoustic sound dampening, fully safe for radiant underfloor heating.

Permanently Elastic
Compensates Swelling

Sound Dampening
Acoustic Comfort

Underfloor Heating
Safe to +80℃

Solvent-Free
Low Odor

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Verified Laboratory Properties

PU-24 Engineering Performance Parameters

Fully tested according to international ISO, ASTM, and EN test protocols. Batch COA provided with every shipment.

Parameter	Test Method	Performance Value	Engineering Relevance
Chemical Base	Polyurethane	1-Component Elastic PU	100% solids, zero solvent, low odor
Hardness (Shore A)	ISO 868	45 – 50 Shore A	Balances elastic foot cushioning with plank stability
Elongation at Break	ISO 8339	≥ 150%	Compensates natural seasonal wood swelling & shrinkage
Skinning / Open Time	23℃, 50% RH	45 – 60 minutes	Generous notched trowel working window
Foot Traffic Ready	Ambient Cure	24 hours	Light foot traffic permitted after 24 hours
Radiant Heat Safe	Thermal Chamber	Up to +80℃	Zero softening or degassing over heated floor screeds
Impact Sound Reduction	Acoustic Test	Up to 14 dB	Dampens hollow footstep resonance in multi-story living

📋 Full Technical Datasheet (TDS) and MSDS/SDS available in PDF.

Download PU-24 TDS
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Elastic Polyurethane vs Rigid Flooring Adhesives

Solid wood planks naturally expand and contract with seasonal humidity. Rigid adhesives (like standard epoxy or PVA) cannot accommodate this movement, causing hollow buckling or tearing the concrete screed surface.

PU-24 Permanent Elasticity: Acts as an elastomeric stress-relieving cushion between wood and concrete. It flexes with wood expansion, prevents hollow footstep drumming, and remains permanently elastic.

Precast Concrete & Façade Joints

Where & How PU-24 Low Modulus Polyurethane Performs

Engineered for high-movement prefabricated precast concrete (PC) panels, exterior wall expansion joints, and masonry perimeter caulking with ISO 11600 25LM compliance.

Prefabricated Concrete Wall Panel Vertical Joint Caulking

Precast PC Wall Panels

Prefabricated Concrete Panel Joints

Low-modulus formulation exerts minimal stress on precast concrete edges during thermal contraction cycles, completely preventing concrete substrate edge spalling.

Joint movement capability: ±25% (Class 25LM)
Tensile modulus at 100% elongation: ≤ 0.40 MPa

Polyurethane Sealant Concrete Expansion Joint Application Closeup

Vertical Expansion Joints

Building Exterior Expansion Joints

High elastic recovery ensures watertight integrity across vertical building facade separation joints exposed to heavy wind-driven rain and seismic vibrations.

Elastic recovery rate > 90% (ISO 7389)
Over-paintable with exterior acrylic and elastomeric coatings

PU Sealant High Elongation and Tear Resistance Test Display

800% Elongation

Super-High Elongation at Break

Engineered polymer chains deliver extreme elongation without tearing even when building joints widen far beyond architectural design tolerances.

Elongation at break: ≥ 800%
Shore A Hardness: 25 ± 5

Polyurethane Sealant Construction Facade Sealing Hero

Weatherproof Perimeter

Window Perimeter & Masonry Caulking

Excellent unprimed primerless adhesion to brickwork, porous concrete, aluminum door frames, and natural stone without plasticizer bleed-out or staining.

Non-sagging vertical paste up to 35 mm joint widths
UV stabilized against chalking and yellowing

Supplying Precast Concrete Fabricators or Cladding Contractors?

CHEMPU provides free technical support, adhesion verification on your precast concrete mix, and bulk container export quotations.

Export Logistics & Packaging

Packaging Formats & 20GP Container Logistics

Multi-layer high-barrier foil sausage packaging engineered for moisture sensitivity protection during tropical sea freight shipping.

PU-24 600ml Foil Sausage Pack Packaging Format

Available Package Formats

Supplied in standard 600 ml aluminum foil sausages (20 pcs/ctn) and 310 ml cartridges (24 pcs/ctn) with interchangeable pointing nozzles.

PU-24 Palletized Master Cartons for Container Export

Seaworthy Palletized Packaging

Solid ISPM-15 export wooden pallets protected by corner edge boards and thick shrink film, tested for multi-tier ocean container stacking.

20GP Full Container Loading (FCL) Matrix

Specification	Units/Ctn	20GP Container
600 ml Foil Sausage	20 pcs	1,200 ctns (24,000 pcs)
310 ml Cartridge	24 pcs	1,800 ctns (43,200 pcs)
200 L Industrial Drum	250 kg/drum	80 drums (20,000 kg)

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🏷️ Precast OEM & Formulation Services

Custom private labeling for global construction chemicals distributors:

Color Matching: Concrete Grey, Off-White, Black, and custom RAL facade colors.
Packaging Design: High-definition sausage foil printing with local building codes.
Climate Adaptation: Fast-curing formulation for winter or retarded cure for tropical summer.
Delivery Lead Time: FOB Shanghai Port shipment within 15-20 days of order confirmation.

Storage & Life: 9 months at +5°C to +25°C in unopened moisture-barrier foil sausages.