Polyurethane Prepolymer - Professional Sealant Grade
Industrial Premium
Construction Chemical

Polyurethane Prepolymer (Sealant Grade)

Premium high-performance polyurethane prepolymer engineered for demanding construction applications including joint sealing, structural glazing, weatherproofing, and building envelope systems. Our specialized sealant-grade prepolymer delivers exceptional flexibility, consistent performance, and reliable adhesion for critical construction processes requiring superior sealing with stringent quality control standards.

  • High Flexibility
  • Superior Adhesion
  • Sealant-Grade Formula
  • Consistent Performance
  • Joint Sealing Applications
  • Weatherproofing Systems
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Technical Specifications

Chemical Base: MDI-based polyurethane prepolymer
NCO Content: 12-15%
Physical State: Amber to dark brown liquid
Density (25°C): 1.10-1.15 g/cm³
Viscosity (25°C): 2000-8000 mPa·s
Gel Time (25°C): 15-45 minutes
Tack Free Time: 2-6 hours
Full Cure: 24-48 hours
Shore A Hardness: 35-85 (depending on formulation)
Tensile Strength: 2-8 MPa
Elongation at Break: 200-600%
Water Content: ≤ 0.1%
Service Temperature: -40°C to +90°C
Packaging Options: 200kg drums, 1000kg IBC tanks

Applications

Waterproofing Membranes
Sealants & Adhesives
Protective Coatings
Floor Coatings
Elastomeric Systems
Automotive Applications
Industrial Coatings
Marine Coatings
Mechanical Components
Construction Sealants
Flexible Membranes
Tool & Equipment Coatings

Industry-Specific Grades

DRAVYOM offers specialized polyurethane prepolymer grades tailored for different curing and performance requirements, ensuring optimal flexibility and durability across diverse coating and sealant applications.

Standard Grade (12-15% NCO)
NCO Content: 12-15% Viscosity: 2000-4000 mPa·s Cure Time: 24-48 hours Application: General purpose
Fast Cure Grade
Gel Time: 15-30 min Tack Free: 2-4 hours Reactivity: High Application: Quick assembly
Waterproofing Grade
Elongation: 400-600% Water Resistance: Excellent Flexibility: High Application: Membrane systems
High Performance Grade
Tensile Strength: 6-8 MPa UV Resistance: Enhanced Chemical Resistance: High Application: Demanding environments

Quality Standards

DRAVYOM's Polyurethane Prepolymer is manufactured under stringent quality control protocols, meeting international coating and sealant standards. Our production ensures consistent curing performance and mechanical properties.

ISO 9001:2015 Certified Manufacturing
ASTM D Standards
12-15% Reliable NCO Content
Advanced Performance Testing
Coating Grade Compliance
Consistent Batch Quality
Certificate of Analysis
Safe Transportation Standards

Advanced Chemical Properties & Performance

Polyurethane Prepolymer exhibits exceptional reactivity and cross-linking properties with moisture-curing chemistry. Its isocyanate functionality provides superior adhesion, flexibility, and chemical resistance for demanding sealant and coating applications.

Chemical Properties
Chemical Type: MDI-based prepolymer
NCO Content: 8-12%
Viscosity: 8000-15000 cP at 25°C
Moisture Sensitivity: Highly reactive with water
Physical Properties
Appearance: Clear to pale yellow liquid
Specific Gravity: 1.15-1.25 at 25°C
Flash Point: > 200°C
Storage Stability: 6 months in dry conditions
Curing Properties
Skin Time: 15-30 minutes at 23°C/50% RH
Tack-free Time: 2-4 hours
Full Cure: 24-48 hours
Cure Rate: 3mm per 24 hours
Performance Standards
Shore A Hardness: 25-45 (cured)
Tensile Strength: 1.5-3.0 MPa
Elongation: 300-600%
Modulus (100%): 0.3-0.8 MPa
Environmental Resistance
Temperature Range: -40°C to +90°C
UV Stability: Good with stabilizers
Chemical Resistance: Excellent to most chemicals
Water Resistance: Excellent immersion resistance

Performance Characteristics

Performance metrics demonstrate Polyurethane Prepolymer effectiveness in sealant applications with excellent adhesion, superior flexibility, and outstanding environmental resistance for long-term durability.

Adhesion Properties

Strength: Excellent to most substrates

Primer may enhance adhesion
Flexibility

Elongation: 300-600% at break

Superior movement capability
Cure Speed

Rate: 3mm depth per 24 hours

Humidity dependent
Temperature Performance

Range: -40°C to +90°C service

Maintains flexibility
Chemical Resistance

Protection: Excellent resistance

Wide chemical compatibility
UV Stability

Durability: Good with stabilizers

Long-term exterior use

Safety Information

Contains isocyanates - may cause respiratory and skin sensitization. Use only in well-ventilated areas with appropriate respiratory protection. Avoid skin and eye contact. Use chemical-resistant gloves and safety glasses. Follow all isocyanate safety protocols.

Sensitizer Warning
Respiratory Protection
Chemical Gloves Required

Storage & Handling

Store in original sealed containers in a cool, dry area with inert gas headspace. Protect from moisture, heat, and contamination. Use appropriate dispensing equipment and ensure containers are properly resealed after use.

Store at 15-25°C
Moisture-free environment
Inert gas blanket
Chemical storage standards

Chemical Mechanisms & Reaction Pathways

Polyurethane prepolymer demonstrates controlled chain extension mechanisms through isocyanate-polyol reactions, enabling predictable curing with well-characterized mechanical properties for reliable sealing and coating applications.

Chain Extension

Isocyanate groups react with hydroxyl groups forming urethane linkages

Primary curing mechanism
Moisture Curing

Atmospheric moisture triggers crosslinking for final polymer formation

Controlled curing process
Flexible Networks

Elastomeric properties with excellent chemical resistance

Superior sealing performance
Temperature Stability

Stable performance across wide temperature ranges

Reliable construction chemistry

Regulatory Compliance & Documentation

Comprehensive regulatory compliance ensures safe use in construction and industrial applications with complete documentation packages supporting building codes and polyurethane standards.

Construction Standards

Building sealant and construction material compliance

Industry Compliance

ASTM and international polyurethane regulations

Safety Documentation

Worker safety and isocyanate handling protocols

International Standards

Global polyurethane and construction regulations

Quality Documentation

Complete construction-grade certifications

Transportation

Safe handling protocols for reactive chemicals

Technical Support & Value-Added Services

DRAVYOM's polyurethane technology support team provides comprehensive guidance, formulation expertise, and application consulting to optimize polyurethane prepolymer performance in construction and industrial applications.

Construction Services
  • Sealant formulation design
  • Curing profile optimization
  • Application methodology
  • Performance enhancement
Technical Testing
  • Mechanical property evaluation
  • Adhesion strength testing
  • Cure characterization
  • Environmental resistance studies
Process Optimization
  • Application process development
  • Quality control protocols
  • Storage optimization
  • Performance monitoring
Supply Solutions
  • Moisture-controlled packaging
  • Bulk supply logistics
  • Technical consultation
  • Custom viscosity services

Environmental Impact & Sustainability

Our polyurethane prepolymer represents sustainable construction chemistry through long-term durability, reduced maintenance requirements, and responsible formulations supporting green building initiatives.

Durability Enhancement

Extended service life reducing replacement needs

Material Efficiency

High-performance with minimal material consumption

Moisture Resistance

Superior weatherproofing reducing maintenance cycles

Green Construction

Supporting sustainable building and energy efficiency

Process Efficiency

Streamlined application with reduced waste generation

Environmental Compliance

Green building and environmental protection certifications

Manufacturing Excellence & Quality Control

DRAVYOM's specialized polyurethane manufacturing facility employs advanced polymer synthesis technology and stringent quality monitoring systems to ensure consistent polyurethane prepolymer quality and construction performance.

Advanced Synthesis

Precision polyurethane chemistry with controlled molecular weight

Construction chemical excellence
Quality Testing

Comprehensive testing including viscosity, reactivity, and performance

Rigorous construction standards
Quality Systems

ISO 9001:2015 certified polyurethane operations

Construction industry excellence
Controlled Environment

Moisture-controlled packaging preserving reactivity

Maintaining construction performance

Market Applications & Performance Data

Comprehensive performance data demonstrating polyurethane prepolymer effectiveness across construction applications with validated sealing benefits and superior durability performance.

Construction Sealants
Adhesion: >2 MPa tensile strength on multiple substrates Flexibility: 300%+ elongation at break for movement joints Durability: 25+ year service life in weathered environments
Industrial Coatings
Chemical Resistance: Excellent resistance to solvents and chemicals Abrasion Resistance: Superior wear performance in industrial environments Temperature Range: Stable performance -40°C to +80°C
Infrastructure Applications
Waterproofing: Complete moisture barrier protection Joint Sealing: Excellent movement accommodation Repair Systems: Reliable structural bonding and sealing

DRAVYOM Competitive Advantages

Construction Expertise

Deep understanding of polyurethane chemistry and construction requirements

Advanced Chemistry

Optimized prepolymer formulations with proven construction benefits

Durability Focus

Long-term performance in demanding construction environments

Quality Assurance

Comprehensive quality control ensuring consistent construction performance

Construction Partnership

Collaborative approach with contractors and construction companies

Market Leadership

Leading provider of polyurethane chemicals in the Indian market