Anti-Yellowing Clear Epoxy For Leather, Wood, And Natural Material Coating｜E-1188TT / H-1188TT

Fong Yong Chemical Co., Ltd. is one of the leading manufacturers and suppliers of anti-yellowing clear epoxy for leather, wood, and natural material coating｜e-1188tt / h-1188tt in Taiwan. Welcome to wholesale bulk customized anti-yellowing clear epoxy for leather, wood, and natural material coating｜e-1188tt / h-1188tt at low price from our factory. If you have any enquiry about quotation and free sample, please feel free to email us.

 

E-1188TT/H-1188TT is a two-component, solvent-free anti-yellowing clear epoxy resin developed for protective and decorative coating on leather goods, wood and bamboo crafts, and mixed-material decorative objects - including assemblies combining metals, ceramics, stone, gems, wood, bamboo, leather, and electronics. Formulated for applications where flexibility, transparent clarity, and long-term appearance retention are required together, the system delivers Shore A 75 hardness with a crystal-clear high-gloss finish, low viscosity for smooth self-leveling, and the option to cure at room temperature or under heat - with broad substrate compatibility across the widest range in the clear epoxy lineup. Available for OEM production evaluation; sample testing is recommended before production release.

 

Key Takeaways

• Broadest substrate compatibility in the clear epoxy lineup - confirmed adhesion on metals, ceramics, stone, gems, wood, bamboo, paper, leather, and electronics. PP, PE, PVC, PC, Teflon, and silicone are excluded. Enables a single coating system across mixed-material assemblies without switching products between substrate types.
• Shore A 75, elongation 40% - semi-soft cured coating that flexes with natural materials. Leather, wood, and bamboo substrates move with temperature and humidity changes. Shore D hard coatings crack or delaminate on these substrates under repeated flexing or dimensional change; Shore A 75 with 40% elongation maintains adhesion through substrate movement without accumulating stress-induced failure.
• Anti-yellowing formulation for indoor display and retail applications - appearance retention under indoor ambient conditions is the primary design target. For retail display items, gift products, and branded decorative objects with extended shelf life, optical consistency over time is a quality requirement, not a cosmetic preference.
• Pot life 60 minutes (60g, 25°C); mix ratio 3:1 by weight (E-1188TT : H-1188TT). RT gel time: 8–24 hours depending on ambient temperature, humidity, and coating thickness; coating reaches rated hardness and performance at 7 days. Heat cure: 80°C × 2 hours.

 

Why Hard Coatings Fail on Natural Materials - and Why Anti-Yellowing Matters for Display Products

Shore D hard coatings deliver maximum scratch resistance on rigid, dimensionally stable substrates. On natural materials - leather, wood, bamboo - they introduce a failure mode that appears over time rather than immediately: cracking and delamination. Natural materials are not dimensionally stable. Leather flexes with every handling cycle. Wood and bamboo expand and contract with ambient humidity. A coating that cannot move with the substrate will eventually separate from it. The failure is not a bonding deficiency - it is a mismatch between coating hardness and substrate behavior.

Shore A 75 addresses this mismatch. It provides surface protection appropriate for handled decorative products and retail goods - while maintaining the flexibility to move with substrates that flex, expand, and contract in service. For mixed-material assemblies where rigid metal components and flexible leather or wood elements appear in the same product, a single Shore A 75 system covers all substrate types without requiring different coating systems for different components.

 

The anti-yellowing requirement is separate from the hardness question, but equally important for display-destined products. Many standard clear epoxy systems without anti-yellowing formulation undergo progressive optical shift under indoor ambient conditions - visible as yellowing against light-colored substrates such as natural leather, pale wood, or white ceramic. For products with retail shelf life measured in months or gift products presented in packaging, this degradation is a product quality failure. Anti-yellowing formulation is a material selection criterion for display products, not a coating upgrade.

Figure 1. Shore D coatings crack and delaminate on natural materials that flex or expand with use and humidity. Shore A 75 maintains adhesion through substrate movement - leather flexing, wood and bamboo dimensional change. Failure is a hardness-substrate mismatch, not a bonding deficiency.

 

Applications

Figure 2. E-1188TT/H-1188TT substrate compatibility: confirmed adhesion on metals, ceramics, stone, gems, wood, bamboo, paper, leather, and electronics. Excluded: PP, PE, PVC, PC, Teflon, silicone. Broadest substrate range in the clear epoxy lineup - enables single coating system across mixed-material assemblies.

 

Leather Goods Flexible Decorative Coating

E-1188TT/H-1188TT is suited for clear flexible decorative coating on leather goods components - including bag panels, wallet exteriors, shoe uppers, and leather accessory elements - where a high-gloss transparent film is required without compromising leather flexibility. Shore A 75 maintains adhesion through the repeated flexing cycles inherent in leather goods use; Shore D hard coatings crack at flex points over time. Anti-yellowing formulation is particularly relevant for natural, light-colored, or metallic-finish leathers where optical shift is visible against the substrate. RT cure eliminates heat exposure risk to heat-sensitive leather and adhesive components. Adhesion compatibility with specific leather finishes, tannages, and surface treatments should be verified before production use.

 

Wood and Bamboo Craft and Gift Object Coating

For clear decorative coating on wood and bamboo craft objects, gift items, and decorative souvenirs, E-1188TT/H-1188TT provides a crystal-clear, high-gloss finish that enhances natural grain and surface appearance while accommodating the dimensional movement of natural materials. Wood and bamboo expand and contract with ambient humidity - Shore A 75 flexibility accommodates this dimensional movement without micro-cracking, which Shore D coatings develop over extended service. Anti-yellowing performance is relevant for products displayed in retail environments or packaged for gift use, where appearance consistency from manufacture to end-use is a quality expectation. Adhesion compatibility with specific wood species, surface treatments, and lacquer finishes should be verified before production use.

 

Mixed-Material Decorative Object Coating

For decorative objects and gift items that combine multiple substrate types in a single assembly - such as metal findings with wood or bamboo elements, ceramic components with leather detailing, or stone and gem inlays with natural material bases - E-1188TT/H-1188TT covers the full substrate range without requiring system changes between components. The broad substrate compatibility confirmed in TDS (metals, ceramics, stone, gems, wood, bamboo, leather) directly supports mixed-material OEM production where coating consistency across substrates is a manufacturing requirement. For assemblies with metal components, published bond strength data provides a quantitative reference point: aluminum 200 psi, steel 220 psi, sandblasted steel 261 psi. Adhesion should be verified for each substrate component and any surface coatings, inks, or treatments present in the specific assembly before production use.

 

Selection Notes

Use these notes to determine whether E-1188TT/H-1188TT is appropriate for evaluation for your application.

• Protective coating on leather, wood, bamboo, or mixed-material objects where flexibility and anti-yellowing are both required - E-1188TT/H-1188TT may be evaluated. Substrate flexibility compatibility and anti-yellowing performance are the primary selection drivers.
• Sticker and label doming applications - E-2177/H-2177 is developed specifically for doming and transparent overlay on paper, PET, and film substrates and should be evaluated for these applications.
• Shore D hard coating required - a higher-hardness epoxy system is more appropriate. E-1188TT/H-1188TT cures to Shore A 75; it is not a hard coat system.
• Outdoor or extended UV exposure service - an outdoor-rated polyurethane system should be evaluated separately. E-1188TT/H-1188TT is formulated for indoor service conditions.
• Soft flexible dome required (Shore A 45–55) - a soft clear doming epoxy resin should be evaluated separately. E-1188TT/H-1188TT cures to Shore A 75.
• PP, PE, PVC, PC, Teflon, or silicone substrate - adhesion to these substrate types is not supported.
• Thick casting or deep-pour applications - a casting-specific resin system should be evaluated. E-1188TT/H-1188TT is formulated for coating and surface overlay, not thick-section casting.

Figure 3. Application boundary guide for E-1188TT/H-1188TT: primary use (leather goods, wood and bamboo crafts, mixed-material decorative objects requiring flexible anti-yellowing clear coating) and situations requiring evaluation of a different system.

 

Frequently Asked Questions

Q: What does anti-yellowing mean for E-1188TT/H-1188TT, and does it mean permanent clarity?

A: Anti-yellowing in E-1188TT/H-1188TT refers to formulation-level design for appearance retention under indoor ambient conditions. Standard clear epoxy systems without anti-yellowing formulation undergo progressive yellowing under indoor lighting and thermal cycling - visible as optical shift against light-colored substrates such as natural leather, pale wood, or white ceramic. Anti-yellowing formulation resists this degradation pathway under indoor service. It does not mean permanent clarity under all conditions; performance depends on the specific indoor environment, lighting exposure, and service duration, and should be validated under actual service conditions before production use.

 

Q: What substrates is E-1188TT/H-1188TT compatible with?

A: TDS confirms good adhesion on metals, ceramics, stone, gems, wood, bamboo, paper, leather, and electronics. PP, PE, PVC, PC, Teflon, and silicone are excluded. For mixed-material assemblies typical of leather goods, wood and bamboo crafts, and decorative objects, adhesion should be verified for each substrate component - including any surface lacquers, dyes, tannages, inks, or treatments present on the production material - before committing to production use. Mix ratio is 3:1 by weight - weight measurement required; volume measurement is not interchangeable.

 

Q: Why is Shore A 75 specified rather than Shore D for natural material applications?

A: Shore D hard coatings provide maximum scratch resistance on rigid, dimensionally stable substrates. On leather, wood, and bamboo - which flex, expand, and contract with use and ambient conditions - Shore D coatings develop micro-cracks and delamination over time. Shore A 75 maintains flexibility to move with the substrate through repeated handling and dimensional change, while still providing impact and abrasion protection appropriate for handled decorative goods. For applications on rigid substrates where Shore D hardness is required, a harder epoxy system should be evaluated separately.

 

Q: Can E-1188TT/H-1188TT be cured at room temperature for heat-sensitive substrates?

A: Room-temperature cure is a full capability of the system. At standard ambient conditions, the coating gels in 8–24 hours - the range reflects sensitivity to ambient temperature, humidity, and coating thickness. The coating continues to build hardness and performance after gel, reaching rated Shore A 75 and full mechanical properties at 7 days. RT cure is appropriate for heat-sensitive substrates such as leather, assembled components with adhesives, or operations without oven equipment. Heat cure at 80°C reduces full cure to 2 hours for higher-volume operations.

 

Before Requesting a Sample

To make sample evaluation efficient, prepare three items before inquiry: (1) substrate type and surface condition - including any lacquers, dyes, tannages, or surface treatments present on the production material; (2) application geometry - coating thickness, object dimensions, and whether the substrate is flat or three-dimensional; for three-dimensional objects, edge coverage and drainage behavior during cure should be noted; (3) cure equipment available - oven capability or RT-only. Mix ratio is 3:1 by weight (E-1188TT : H-1188TT) - weight measurement is required for consistent cure.

 

Existing production lines do not need to match the reference cure profile exactly before evaluation. Initial discussion is intended to determine whether the substrate compatibility and cure schedule are consistent with current manufacturing conditions.

 

For leather goods, wood and bamboo craft objects, mixed-material decorative products, or other natural material applications where anti-yellowing optical clarity and substrate flexibility are both required, share your substrate type, surface treatment, and intended use environment - retail display, gift packaging, or end-use service. This helps determine whether E-1188TT/H-1188TT is a direct fit or whether substrate compatibility should be reviewed first.

 

Sample evaluation is recommended before production release.

 

Evaluation discussions may include substrate compatibility review, cure schedule options, and preliminary coating thickness recommendations based on the provided application and production conditions.

 

Technical Documentation

🔗 TDS request - E-1188TT / H-1188TT Technical Data Sheet

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Property	E-1188TT (Part A)	H-1188TT (Part B)
Appearance	Clear Liquid	Clear Liquid
Viscosity (cps, 25°C)	1,000–2,000	10–150
Mix Ratio (wt/wt)	3 : 1 (E-1188TT : H-1188TT)
Pot Life (60g, 25°C)	60 minutes
Gel Time (RT)	8–24 hours
Gel Time (80°C)	1–2 hours (size-dependent)
Full Cure (RT)	7 days - rated hardness and performance
Full Cure (Heat)	80°C × 2 hours
Hardness (Shore A, 25°C)	75
Tensile Strength (psi)	440
Elongation (%)	40
Bond Strength - Al / Al (psi)	200
Bond Strength - Fe / Fe (psi)	220
Bond Strength - Sandblasted Fe / Fe (psi)	261

All values from TDS (Rev. 2017/09/14). Pot life, gel time, and cure conditions will depend on ambient temperature, humidity, coating thickness, and object size. RT gel time of 8–24 hours reflects performance at standard conditions - lower temperatures and higher humidity extend gel time. Coating reaches rated Shore A 75 hardness and mechanical performance at 7 days (RT) or 80°C × 2 hours. Mix ratio is 3:1 by weight - weight measurement required; volume measurement is not interchangeable. Vacuum degassing recommended before application to remove entrapped air. Verify adhesion and performance under your specific substrate and application conditions before production use.