Clear Flexible Liquid Coating PU Polyurethane Resin for Casting

Professional Polyurethane Resin Manufacturing Experts
Shenzhen Jianghe New Materials Technology Co., Ltd. is a leading developer and manufacturer of high-performance polymer materials, including epoxy resin, PU resin, UV resin, and liquid silicone rubber. As an integrated source factory combining R&D, production, and sales, we operate a 20,000㎡ modern production base in Dongguan, certified with ISO9001 and other international standards. Supported by advanced equipment, a dedicated R&D team, and a strict QC system, we deliver over 25,000 tons of stable, high-quality, and cost-effective products annually to clients in over 100 countries. We specialize in customized formulations and OEM/ODM services, empowering industries from crafts and furniture to electronics and composites with reliable material solutions.

Key Advantages & Features
1.Automotive-Grade Quality for Long-Term Outdoor Protection

• Formula meets stringent automotive industry requirements for weatherability, offering excellent UV stability and anti-aging performance.
• Maintains coating integrity and optical properties even under harsh outdoor conditions.

2. Anti-Yellowing Breakthrough with 3-Year Indoor Guarantee

• Advanced anti-yellowing formulation ensures no noticeable yellowing for approximately three years under indoor use.
• Maintains long-term clarity and transparency, preserving the aesthetics and readability of stickers and signage.

3. Optimized 2:1 Mix Ratio for Cost-Effective Operation

• Unique 2:1 weight ratio reduces overall cost by increasing Part A usage compared to traditional 1:1 ratios.
• Lowers procurement and storage costs for Part B (isocyanate).

4. Balanced High Hardness with Good Flexibility

• Shore A 78±5 hardness provides excellent scratch and abrasion resistance.
• Maintains sufficient flexibility to accommodate substrate thermal expansion, preventing cracking.

5. Dual-Process Formulas for Diverse Production Needs

• Manual dispensing formula: 15-minute pot life for small-batch, detailed work.
• Mechanical dispensing formula: Fast curing for automated, high-volume production.
• Both formulas deliver consistent post-cure performance ensuring product quality stability.

Detailed Technical Specifications

Usage Guide & Steps
Manual Dispensing Process:
1.Environment Preparation: Maintain 15-25°C, <70% RH; condition materials for 24h before use.
2.Substrate Pre-treatment: Preheat substrates (e.g., PVC, plastic labels) at 60°C to remove moisture; fix on level surface.
3.Surface Cleaning: Thoroughly remove dust and oils.
4.Precise Mixing: Weigh Parts A and B at 1:1 ratio, mix until homogeneous.
5.Vacuum Degassing: Degas at -0.1MPa until bubble-free.
6.Even Coating: Transfer degassed resin to clean syringe; apply evenly (typical thickness: 2mm).
7.Surface Inspection: Inspect within 5 mins; address bubbles/dust.
8.Curing: Cure at 60-80°C for 2-3.5h or at room temperature.

Mechanical Dispensing Process:
1.Material Conditioning: Condition sealed containers at 15-25°C, <70% RH for >96h.
2.System Setup: Install suction pumps; let stand for 24h.
3.Substrate Preparation: Fix substrates on flat surface.
4.System Flushing: Flush static mixer and dispense head with dichloromethane or ethyl acetate.
5.System Purging: Dispense to purge air from lines.
6.Even Dispensing: Dispense mixed resin evenly onto surface.
7.Spreading & Debubbling: Spread resin with needle; remove residual bubbles.
8.Heat Curing: Transfer to 60°C oven; cure completely in 2-4h.

Saffety, Handling & Storage Guidelines
1.For Safe Operation & Mixing

• Safety First: Operate in a well-ventilated area, away from ignition sources. Avoid skin and eye contact.
• Mix as Needed: Estimate quantity based on the 40-minute pot life to avoid waste.
• Adapt to Conditions: Preheat Component A if temperature <15°C; use heat-assisted curing if humidity >85% to prevent surface whitening.
• Safe Keeping: Keep out of reach of children.

2.Storage And Shelf Life

• Storage Conditions: Store in a cool, dry place below 25°C (77°F). Keep away from direct sunlight, heat sources, and humid environments.
• Packaging & Stability: The product has a shelf life of 6 months from the date of manufacture when stored unopened in its original container under recommended conditions. Once opened, reseal tightly and use as soon as possible. Do not leave exposed to air for extended periods.

Applications & Project Gallery

Premium Surface Protection for Automotive Interiors and Exteriors
518AB-21FK is a high-performance polyurethane coating solution specifically designed for automotive interior and exterior surface protection. It possesses top-tier weather resistance and UV protection capabilities required by the automotive industry, maintaining long-term optical transparency and color stability in harsh outdoor environments. The product's unique self-leveling properties and low-viscosity formulation ensure uniform coverage on complex curved and irregular surfaces, forming a mirror-smooth protective layer. Excellent flexibility effectively absorbs external impacts, preventing scratches, cracking, or fading of vehicle emblems, nameplates, and decorative trim during daily use.

Long-Term Protection System for Outdoor Commercial Signage
Addressing the durability requirements of outdoor commercial signage, 518AB-21FK provides a professional-grade protective solution. The product offers excellent weather resistance and UV protection, effectively resisting erosion from natural environmental factors such as sunlight, rain, and temperature variations on signage. The high-transparency formulation ensures perfect presentation of underlying designs and colors, while self-leveling properties achieve uniform coverage on large flat surfaces. The coating's wear and scratch resistance reduces routine maintenance frequency, significantly extending the service life of outdoor signage—making it an ideal choice for mall, corporate, and public space outdoor signage systems.

Professional Encapsulation for Industrial and Electronic Labels
In the industrial manufacturing and electronics sectors, 518AB-21FK provides reliable encapsulation protection solutions for precision markings and labels. The product's flexibility accommodates thermal expansion coefficient variations of different substrate materials, preventing coating cracking or peeling due to temperature changes. Low-viscosity characteristics facilitate precise application and complex pattern coverage, while self-debubbling functionality ensures flawless label surfaces. The coating exhibits good chemical stability, resisting oil, solvents, and daily cleaning agents—maintaining long-term legibility. Particularly suitable for high-precision applications such as instrument panels, equipment nameplates, and sensor identification.

OEM Customization Service
1.Customized formulation: Viscosity, flowability, curing time, hardness, transparency, color, and various functional additives (anti-yellowing, UV resistance, flexibility enhancement, flame retardancy, etc.) can be adjusted according to needs to meet different industry application scenarios.
2.Packaging Customization: Multiple packaging sizes are available to suit your production scale, including 1kg, 5kg, 20kg, 25kg, and 200kg drums. All packaging follows international shipping standards to ensure safety and durability.
3.Private Label: Supports brand customization, including bottle label design, outer packaging printing, and logo labeling, helping brand owners and wholesalers quickly build their own brands and enter the market.
4.Supplies and Kits: Pre-mixed kits (such as resin + resin pigment + mold + tools, etc.) are provided according to your end product.
5.Color matching and functional additives: Color matching services are supported, and special effects such as metallic, transparent, and pearlescent colors can be added, as well as various functional additives such as UV stabilizers, defoamers, scratch and abrasion resistant agents, and flame retardants.
6.Sample support: We support sample orders for performance testing before mass production. This ensures compatibility with your process, equipment, and application requirements.
7.Technical consultation and process guidance: Engineers provide one-on-one technical guidance on construction suggestions, curing conditions, mixing ratios, application processes, etc., to help you solve practical problems.

Why Choose Our Customization Services?
1.Fast Response — Initial Technical Proposal Within 72 Hours
Once we receive your requirements, our engineering team will provide an initial formulation direction or technical recommendation within 72 hours. This significantly shortens your R&D cycle and speeds up time-to-market.

2. Cost Advantage — 15–30% Lower Than Trading Companies
As a factory with no middlemen, we offer highly competitive OEM pricing while maintaining strict quality standards. Ideal for distributors, factories, and brand owners seeking stable and scalable supply.

3. Confidentiality Guaranteed — 100% NDA Support, Formulations Never Disclosed
Every custom project can be secured with an NDA. We protect your formulations, data, and intellectual property with strict confidentiality standards and never share them with third parties.

4. End-to-End Control: One-Stop Service from Raw Materials to Delivery
Full in-house control over formulation, production, filling, private labeling, packaging, and logistics ensures consistent quality and stable supply.

5. 17+ Years of Material Manufacturing Expertise
With deep expertise in epoxy resin, PU resin, UV resin, liquid silicone rubber, and gypsum powder, we understand the performance needs of various industries including electronics, crafts, automotive, LED, molds, and flooring.

6.Technical Core: In-House R&D Center and Engineering Team
Experienced application engineers provide one-on-one support in formulation tuning, process optimization, and troubleshooting to ensure optimal performance.

7. Stable Quality — ISO9001 Certified Production
We follow strict quality control standards under ISO9001:2015. Every batch is traceable, stable, and tested to meet your specifications.

8. Fast Sampling & Flexible MOQ
We support rapid sample production and low-MOQ orders, reducing risks for new product launches, distributors, and factory procurement.

9. Brand Empowerment: Complete Private Label and Packaging Customization
Full white-label services including label design, multi-size packaging, and brand logo printing to help you build a professional brand image with ease.

10.Global Delivery: Scalable Production and International Logistics Network
Own large-scale production facilities paired with a mature global logistics network ensure stable output and on-time delivery worldwide.

If You Need Customized Packaging Or Other Specifications, Please Contact Us.

FAQ:

Q1: What's the main difference between manual and mechanical dispensing formulas?
A: The manual formula offers longer pot life (15 mins) for detailed hand work; the mechanical formula cures faster for automated batch production. Both deliver identical cured properties.

Q2: What should be noted when mixing quantities exceed 100g?
A: Larger mix quantities reduce pot life. For large batches, using a mechanical dispensing system with strict temperature and mixing time control is recommended.

Q3: How is the 3-year anti-yellowing guarantee ensured?
A: We use advanced UV absorbers and stabilizers, validated through accelerated aging tests. The guarantee applies to indoor or non-direct sunlight environments.