Product Comparison
| Product Type | Mix Ratio | UV Resistance | Price Level | Ideal Application |
|---|
| Mid-Range PU Resin(This item) | 3:1 | 2 Years (Mid-term Outdoor) | $$$ (Balanced) | Mid-term outdoor car/motorcycle decals, premium emblems. |
| Premium PU Resin | 1:1 | 5+ Years (Long-term Outdoor) | $$$$$ (High-end) | OEM automotive badges, severe outdoor environments, luxury branding. |
| Economy Epoxy Resin (Soft/Rigid) | 2:1 / 3:1 | ~1 Year (Indoor Use) | $ (Budget) | Indoor labels, fridge magnets, short-term promotional gifts. |
UV Aging & Yellowing Resistance Test
Test Standard: QUV Accelerated Weathering Tester | Simulated Natural Outdoor Environment
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Economy Epoxy Resin
Outdoor Duration: 3 Months
Yellowing Level: Severe
Application: Indoor Only
Severe yellowing after 3 months outdoor use | ![]()
Standard 3:1 PU Resin
Outdoor Duration: 2 Years
Yellowing Level: Mild
Application: Mid-term Outdoor
Slight yellowing after 2 years outdoor exposure | ![]()
Premium PU Resin
Outdoor Duration: 5+ Years
Yellowing Level: None
Application: Long-term Outdoor
Crystal clear after 5 years outdoor exposure |
Core Advantages
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2-Year Anti-Yellowing Formula
Industrial-grade UV-resistant raw materials, effectively resist ultraviolet and oxidation. Far better than epoxy resin, meets most mid-term outdoor sticker requirements. | ![]()
3:1 Standard Mass Production Ratio
Widely compatible with mainstream automatic dispensing equipment, stable ratio control, reduces manual errors, suitable for large-scale continuous production. |
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High Transparency & Gloss
Over 98% light transmittance, clear glue layer without fog, creates smooth 3D dome effect, upgrades ordinary printed labels to premium dimensional emblems. | ![]()
Excellent Self-Leveling & Defoaming
Optimized flow formula, automatic leveling and bubble removal, no pinholes or ripples on surface, greatly improves product yield rate in mass production. |
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Flexible & No Edge Lifting
Good flexibility after curing, stickers will not crack, delaminate or lift edges when bent, rolled or rubbed, fully adapts to flexible sticker processing. | ![]()
High Cost-Effectiveness
Controllable formula cost, about 30% lower than premium 1:1 PU resin, greatly reduces raw material procurement budget for volume production factories. |
Technical Specifications
| Product Type | 3:1 Two-component PU Soft Doming Resin |
| Resin Base | Oil-based |
| Mix Ratio by Weight | Part A : Part B = 3 : 1 |
| Appearance (Part A / Part B) | Transparent Clear Liquid / Transparent Clear Liquid |
| Viscosity (25℃, Part A) | 250 - 350 cps |
| Viscosity (25℃, Part B) | 350 - 450 cps |
| Working Time (25℃) | 30 - 60 minutes |
| Curing Condition | 24h @ 25℃ / 2-1h @ 60-80℃ |
| Cured Hardness | Shore A > 52 |
| Yellowing Resistance | 2 years outdoor no obvious yellowing |
| Shelf Life (25℃, Sealed) | 6 months for each component |
| Suitable Process | Manual dispensing + Automatic machine dispensing |
Application Scenarios
![3:1 soft PU glue for 3D crystal wall sticker high transparent anti-yellow]()
3D Crystal Wall Stickers | ![3:1 transparent PU resin for phone case surface coating anti-scratch]()
resin phone cases |
| Suitable for 3D crystal wall stickers, this material offers a rich texture and high transparency, featuring anti-yellowing and anti-fogging properties that last up to two years, ensuring the interior décor retains its beauty and color over time. | Suitable for manufacturing mobile phone cases, it features high elasticity, drop resistance, and resistance to cracking or shattering. It also remains free from yellowing for two years. |
![3:1 PU epoxy resin, suitable for refrigerator magnets and other stationery and creative products, soft and durable.]()
Cultural and creative resin | ![3:1 flexible PU glue for garment and luggage 3D logo label]()
.
3D Signage |
| This material is suitable for creative refrigerator magnet designs; it is soft yet tough, as well as drop-resistant and durable. It bonds well with flexible magnetic substrates and offers excellent flexibility. | Suitable for labels on footwear, apparel, and bags. It offers excellent resistance to repeated flexing—without cracking or peeling—while also being waterproof and tear-resistant. |
Operation Instruction (Dual Process)
| Manual Dispensing Process | Automatic Machine Dispensing |
| 🟢 Keep environment at 15-25℃, relative humidity <70%, store A&B glue for 12h under this condition before use. | 🟢 Place sealed A&B packages in dust-free environment (15-25℃, humidity <70%) for >96h to eliminate bubbles. |
| 🟢 Preheat substrates at 60℃ to remove moisture, fix on horizontal surface, clean dust and oil on surface. | 🟢 Insert feeding pumps respectively, seal and fix, let stand for 12 hours. |
| 🟢 Weigh A and B glue strictly at 3:1 weight ratio, stir fully and evenly for 2-3 minutes. | 🟢 Fix substrates on horizontal workbench, clean surface dust and oil. |
| 🟢 Degas the mixture under -0.1Mpa vacuum until no bubbles remain. | 🟢 Clean pipeline mixer and dispensing head with dichloromethane. |
| 🟢 Dispense glue evenly on substrate surface, wait for natural self-leveling. | 🟢 Start feeding, exhaust air bubbles in pipelines, mixer and dispensing head. |
| 🟢 Remove residual bubbles and dust with needle, adjust glue coverage at dead corners. | 🟢 Dispense glue on sticker surface, adjust glue distribution and remove residual bubbles. |
| 🟢 Cure at 60-80℃ for 2-3.5 hours until surface is non-sticky. | 🟢 Cure at 60℃ for 2-4 hours, then collect and pack finished products. |
Package & Factory Advantages
Standard Package
✅ 1 gallon set/5kg set
✅ Custom package size available for bulk orders
✅ Sealed plastic drum, leakage-proof for sea shipping
✅ Private label printing supported (OEM service) | Why Choose Us
✅ Strict QC for every batch, stable quality consistency
✅ Free sample available (customer bear freight)
✅ Fast delivery: 3-7 working days for stock orders
✅ Full export documents: MSDS, TDS, RoHS provided |
Storage & Safety Notes
![]() Classified as non-hazardous product, transport as general chemical. | ![]() Store sealed in 15-25℃, relative humidity <70%, avoid direct sunlight. |
![]() Part A is unstable when exposed to air, seal immediately after use. | ![]() Both A and B components are hygroscopic, strictly prevent moisture. |
![]() Weigh strictly according to ratio, stir fully for best curing effect. | ![]() Pre-test before mass production to confirm process compatibility. |
Frequently Asked Questions
Q: How long does this 3:1 PU resin resist yellowing outdoors?
A: Verified by QUV accelerated weathering tester, it maintains no obvious yellowing for up to 2 years under natural outdoor environment, which is far better than ordinary epoxy resin.
Q: Is the 3:1 ratio compatible with automatic dispensing machines?
A: Yes, the standard 3:1 weight ratio is perfectly compatible with most industrial automatic dispensing equipment on the market, suitable for large-scale mass production.
Q: What is your MOQ and lead time for bulk orders?
A: The MOQ for wholesale is 50kg. Stock orders can be delivered within 3-7 working days. Custom formula orders require 7-15 working days.
Q: Do you provide free samples and certification documents?
A: We provide 500g free samples for testing (customer covers shipping cost). Full set of export documents including MSDS, TDS, COA are available for customs clearance.
Q: Do you have a higher grade PU resin with longer anti-yellowing?
A: Yes, we also offer premium 1:1 aliphatic PU resin with 5+ years outdoor anti-yellowing performance for high-end outdoor projects. Contact us for details.
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