LeTech Leather Cross Linker X (EXPERT LINE) — Product Overview

LeTech Leather Cross Linker X is a professional-grade, fast-acting hardener designed to maximize the performance of polyurethane (PU) leather coatings. It chemically bonds with polyurethane dispersions to form a dense, three-dimensional cross-linked polymer network — resulting in a stronger, more durable, and more resilient finish on coated leather surfaces.

• Mix ratio: 5–15%
• Pot life after mixing: up to 2 hours
• Best for: automotive leather, furniture leather, footwear, apparel & leather goods
• Not suitable for: suede or nubuck

Key Benefits

• Strong yet flexible finish — improved durability without sacrificing flexibility
• Higher abrasion resistance — ideal for high-wear areas
• Improved water & solvent resistance — helps protect the coating during regular use and maintenance
• Better resistance to sweat, grease & oils — important for frequently touched surfaces
• Accelerated polymerization — faster curing / return-to-service after refinishing
• Improved adhesion — enhances the bond between finishing layers
• Extended coating service life — long-lasting protection for restored leather

Recommended Applications

Designed for professional use on coated/smooth leather where maximum wear resistance is required:

• Automotive leather — seats, steering wheels, door panels, dashboards
• Furniture leather — sofas, armchairs, office chairs
• Footwear
• Leather apparel — jackets, coats, belts
• Accessories & leather goods — bags, wallets, small leather items

Not suitable for suede or nubuck.

How to Use — Step-by-Step (Professional Guide)

Step 1 — Mix the Hardener

Add 5–15% of Leather Cross Linker X to your polyurethane finishing product:

• Leather Primer (adhesion activator)
• Leather Colourant (leather paint)
• Leather Top Coat (protective finish)

Mix thoroughly before application. Higher percentages provide greater hardness and protection; lower percentages help preserve a softer feel.

Important: once mixed, the product must be used within 2 hours. Mix only the amount you plan to use immediately.

Step 2 — Apply in Thin, Even Layers

Apply the mixed product as directed for the base product (Primer / Colourant / Top Coat). Thin, even coats provide the best finish and durability.

Step 3 — Heat-Dry Each Layer

After each coat, dry thoroughly using warm air (household hair dryer / heat). Heat activates and accelerates the cross-linking reaction, helping build a harder, more durable coating.

Step 4 — Test Before Full Application

Always test on a small, inconspicuous area first to confirm compatibility and the desired result.

Safety & Handling

• Professional-grade product: wear chemical-resistant gloves and a protective mask/respirator.
• Ventilation required: work in a well-ventilated area.
• Product is toxic at high concentrations — avoid inhalation and direct contact.
• Moisture-reactive: keep container tightly closed and avoid exposure to humidity.
• Do not prepare more mixture than you can use within the 2-hour pot life.

Storage & Shelf Life

• Shelf life: 6 months (store tightly closed).
• Storage: dry, ventilated area, away from direct sunlight.
• Temperature: 5–35°C (41–95°F)
• Max relative humidity: 80%

Which LeTech Cross Linker Is Right for Your Project?

• Maximum hardness & durability (automotive / heavy-wear): Leather Cross Linker X or Leather Cross Linker X Strong
• Balanced softness & performance (fashion leather goods / accessories): Leather Cross Linker AZ (Universal)
• Eco-friendly approach + enhanced moisture resistance: Leather Cross Linker Eco

FAQ

What is a leather cross linker hardener used for?

A cross linker hardener is added to polyurethane-based leather coatings (primer, leather paint, or top coat) to create a stronger, more durable, and more resistant finish by forming a 3D polymer network inside the coating.

How much Cross Linker X should I mix in?

Mix 5–15% into your polyurethane product. Use lower % for softer items and higher % for high-wear applications (e.g., automotive leather).

How long do I have after mixing?

Up to 2 hours. Mix only what you can use immediately.

Can I use it on suede or nubuck?

No. Leather Cross Linker X is designed for smooth/coated leather used with polyurethane finishing products.

Can advanced DIYers use it?

Yes, but safety precautions are mandatory: gloves, mask/respirator, and good ventilation.

LETECH — LEATHER TOP COAT MATT

Professional waterborne clear finish delivering a stable matte, anti-shine appearance with strong resistance to abrasion, scratches, moisture and everyday contaminants. Locks in colour, controls sheen and keeps surfaces clean for longer.

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Signature Advantages

• True matte, anti-shine finish

• High abrasion & scratch resistance

• Moisture & stain protection

• Flexible waterborne system

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Created for Professionals

• Automotive: steering wheels, bolsters, matte seat zones

• Furniture: low-gloss seating, armrests, contract interiors

• Leather goods: bags, wallets and accessories needing controlled matte look

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Compatible Leather Types

Finished/pigmented leather and many PU/artificial surfaces.

Not suitable for suede or nubuck.

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Refined Result

Forms a clear, flexible protective film that preserves the natural, low-gloss aesthetic. Controls unwanted shine on high-contact zones and provides durable resistance to moisture, dye transfer and everyday wear.

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Application Notes

Apply by sponge or spray in thin, even coats; allow proper flash between layers.

Use as a final step: Degreaser → Prep → Primer → Colourant → Top Coat Matt.

Multiple light coats ensure even sheen seam-to-seam.

For high-wear areas, pair with Cross-Linker (per TDS); Slip Additive may be used to refine hand-feel.

LETECH LEATHER MATT X2 HYPERMATT + SOFTTOUCH

A hyper-matte ultra-low-gloss protective top coat with a refined SoftTouch feel. Engineered for professional finishing where deep mattness, clean tactility and long-term durability are essential.

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Signature Advantages

• Hyper-matte anti-shine finish for a modern, non-reflective look

• SoftTouch tactile effect with a pleasant dry, refined feel

• High resistance to abrasion, scratching, moisture and common solvents

• Waterborne, flexible and compatible with professional colour systems

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Created for Professionals

• Automotive interiors: steering wheels, bolsters, trims and seat panels

• Furniture & contract: high-traffic hospitality and office seating

• Leather goods: bags, cases and accessories requiring stable ultra-matte appearance

Delivers consistent, deep mattness and a premium touch, even in demanding environments.

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Compatible Leather Types

Suitable for:

• Finished / pigmented leather

• PU and artificial leather within waterborne PU systems

(Not intended for suede or nubuck. Always test on a hidden area.)

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Technical Specifications

Finish: Hyper-matte (ultra-low gloss) with SoftTouch tactile effect

Resistance: High abrasion, scratch, moisture & solvent resistance

Application: Spray or sponge in thin, even coats; allow proper flash-off

System use: Final protective layer over LeTech Colourant systems

Additives (pro use): Compatible with Cross-Linker (durability) & Slip Additive (tactile tuning)

Volumes: 100 ml · 145 ml · 200 ml · 500 ml (availability may vary)

Cleanup: Waterborne; rinse tools promptly with water

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Tips & Best Practice

• Clean and degloss thoroughly to ensure even, uniform mattness

• Build protection with multiple thin coats for the smoothest, most natural finish

• For steering wheels or high-wear zones, combine with Cross-Linker X / X Strong for maximum endurance

• Tune the tactile feel with Slip Additive when a silkier hand is desired

LETECH — LEATHER TOP COAT GLOSS

Professional waterborne clear finish delivering a high-gloss, wet-look sheen with strong resistance to abrasion, scratches, moisture and everyday contaminants. Locks in colour, adds depth and ensures long-term cleanability.

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Signature Advantages

• Premium high-gloss finish

• Strong abrasion & scratch resistance

• Moisture & stain protection

• Flexible waterborne system

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Created for Professionals

• Automotive: seat panels, trim, steering-wheel zones

• Furniture: high-touch seating, armrests, decorative leather

• Leather goods: bags, wallets and accessories needing glossy durability

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Compatible Leather Types

Finished/pigmented leather and many PU/artificial surfaces.

Not suitable for suede or nubuck.

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Refined Result

A clear, flexible top film that deepens colour, adds controlled wet-look shine and shields the surface from wear, dye transfer and premature gloss loss.

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Application Notes

Apply by sponge or spray in thin, even coats; allow flash between layers.

Use as the final step: Degreaser → Prep → Primer → Colourant → Top Coat Gloss.

Build gloss with multiple light passes; avoid heavy, wet layers.

For extreme-wear areas, combine with Cross-Linker (per TDS) to maximise endurance and stability.

Leather Top Coat High Gloss – Super High Gloss Protective Leather Finish (Expert Line)

Leather Top Coat High Gloss is a professional super high gloss protective finish designed to enhance and protect restored leather surfaces. Developed within the LeTech Expert Line, it forms a durable, flexible film that significantly improves abrasion resistance, scratch resistance, and protection against moisture and solvents.

Engineered for elegant leather изделий with soft leather finishing, this high-performance coating delivers an exceptional glossy appearance while maintaining natural softness and tactile comfort.

What This Product Does

• Creates a super high gloss protective layer
• Improves resistance to abrasion and scratches
• Enhances resistance to moisture and solvents
• Forms a high-elastic, durable protective film
• Reinforces the final stage of leather restoration

Compatible Leather Types

• Leather furniture
• Leather footwear & garments
• Leather goods
• Vegetable-tanned leather
• Patent leather

Not suitable for suede and nubuck.

Gloss Control & Compatibility

All LeTech Leather Top Coat finishes are fully compatible and can be mixed in different proportions to achieve the desired gloss level and performance characteristics:

• Matt
• Gloss
• Matt X2 Finish
• High Gloss

Key Benefits

• Exceptional softness and natural leather feel
• Rich, elegant super high gloss appearance
• High resistance to mechanical wear
• Excellent elasticity, even at extremely low temperatures
• Enhanced tactile properties — authentic natural leather sensation
• High ecological safety class
• Produced in accordance with modern leather industry standards

Application Process

Surface Preparation

• Thoroughly clean the surface using Leather Ultimate Cleaner.
• For heavy contamination or grease, use Leather Degreaser.
• Degrease using Leather Alcohol Cleaner or Leather Liquid Degreaser.
• If unstable old coatings are present, remove them using Solvent Cleaner or Leather Prep.
• Apply LeTech Leather Primer with Cross Linker X (5–10%) before recoloring if required.

Color Application (if applicable)

• Shake color thoroughly before use.
• Apply thin, even layers using spray gun or airbrush.
• Nozzle size: 0.5–1.2 mm
• Pressure: 1.1–8 bar
• Filter through 190-micron filter before spraying.

Applying Leather Top Coat High Gloss

• Apply as the final stage after repair and recoloring.
• Spray application (airbrush or spray gun) is recommended for even coverage.
• Avoid excessive build-up to prevent color distortion or stiffness.
• Add Cross Linker X (5–10%) for enhanced durability.
• Surface usable after 2–3 hours.
• Full curing time: 8–12 hours (depending on temperature and humidity).
• Avoid cleaners and leather care products during the first week after application.

Tool Cleaning

• Clean tools thoroughly with water after use.
• If necessary, use LeTech Leather Prep solvent.

Professional Use Notice

This is a professional-grade material. Proper results require adherence to application technology and understanding of the product’s properties. Always test on a small, inconspicuous area before full application.

FAQ

What level of gloss does this finish provide?

Leather Top Coat High Gloss provides a super high gloss finish designed for elegant leather изделия requiring maximum shine.

Can I adjust the gloss level?

Yes. All Leather Top Coat finishes are compatible and can be mixed in different proportions to achieve the desired gloss level.

Is this suitable for suede or nubuck?

No. This product is not suitable for suede or nubuck.

How long before the surface can be used?

Typically after 2–3 hours. Full curing takes 8–12 hours.

Is Cross Linker X required?

Cross Linker X (5–10%) is recommended for enhanced durability and improved resistance.

Professional Anti-Wear Slip Additive for Leather Top Coat Finishing

LeTech Slip Additive is a professional-grade anti-wear modifier formulated to be blended directly into leather top coat finishes, significantly increasing surface durability, abrasion resistance, and tactile quality. Developed to British restoration standards and trusted by professional leather technicians, detailers, and restoration specialists across automotive, furniture, marine, and luxury goods sectors.

What This Product Does

When incorporated into a leather top coat or protective finish, Slip Additive forms a reinforced surface layer that resists mechanical wear, surface scratching, scuffing, and abrasion. It simultaneously improves the tactile feel of the finished surface — delivering a refined, professional result without compromising the leather's natural breathability, flexibility, or moisture exchange properties.

Unlike standard top coat finishes applied alone, a Slip Additive-modified coating provides measurably superior resistance to daily operational stress — critical for high-contact surfaces such as automotive seats, steering wheels, furniture cushions, and leather accessories subjected to consistent use.

Professional Applications

• Automotive Interiors: Seats, door panels, steering wheels, headrests, and dashboards requiring durable, wear-resistant protective finishes after leather repair or full redye.
• Furniture Restoration: Sofas, chairs, and upholstered leather pieces in residential and commercial environments where surface longevity and appearance retention are essential.
• Marine Interiors: Helm seats, cabin upholstery, and cockpit leather exposed to demanding environmental and mechanical stress.
• Private Aviation: Aircraft cabin seating and leather surfaces requiring premium-grade protection with strict performance consistency.
• Luxury Leather Goods: Handbags, belts, small leather goods, and footwear requiring scratch and scuff resistance with maintained tactile quality.

Not suitable for suede or nubuck surfaces.

Why Professionals Choose LeTech

LeTech Expert Line products are formulated to professional restoration standards developed in Britain — where exacting performance expectations and material compatibility are non-negotiable. Slip Additive integrates seamlessly into the LeTech finishing system, working in combination with Leather Top Coat and Cross Linker to deliver a complete, professionally engineered protective layer.

• Water-based, low-VOC formula — compliant with environmental and toxicological standards
• Does not alter leather color or surface clarity
• Preserves leather breathability and natural flexibility
• Proven performance across automotive OEM, furniture, and luxury goods restoration workflows
• Extends the operational life of finished leather surfaces — reducing costly rework and premature re-restoration

Technical Specifications

• Base: Water-based formulation
• Recommended Addition Rate: 7–10% of total top coat product volume
• Compatible With: LeTech Leather Top Coat (all sheen levels); compatible across matte, satin, and gloss finishes
• Surface Compatibility: Pigmented leather, coated leather, automotive leather, furniture leather, leather footwear, leather apparel, leather goods
• Application Method: Mixed into top coat prior to application; recommended application via airbrush or HVLP spray gun for uniform coverage
• Initial Cure Time: 2–3 hours to light operational use
• Full Cure Time: 8–12 hours
• Post-Restoration Care: Avoid cleaning agents and conditioners for a minimum of 7 days following application
• Color Effect: None — non-tinting formula
• Not Suitable For: Suede, nubuck, or uncoated raw leather

LETECH X-GUARD ADDITIVE

An innovative water-based performance additive for leather top coats. It enhances UV protection, abrasion resistance, dye-transfer defence, and overall durability — all while preserving the natural feel and finish when used as directed.

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Signature Advantages

• Boosts UV stability to keep colour fresh over time

• Improves abrasion resistance for high-contact surfaces

• Enhances dye-transfer and soil-repellency performance

• Designed for water-based leather top coats across Matt, Satin, and Gloss finishes

• Preserves tactile feel without adding unwanted shine

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Created for Professionals

• Automotive interiors requiring upgraded durability

• Furniture and upholstery exposed to daily wear

• Leather goods and accessories prone to friction and dye transfer

• Workshops seeking a reliable leather finishing additive for long-term protection

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Compatible Systems

Optimised for LeTech water-based leather top coats.

A small-batch compatibility test is recommended for non-standard or third-party systems.

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Refined Result

A tougher, more stable protective film with elevated UV defence, cleaner long-term appearance, and increased resistance to wear — without compromising the original finish.

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Application Notes

Mix 10–15% X-Guard Additive into the chosen Top Coat, blending until fully homogeneous.

Test on a sample panel to verify sprayability and gloss level.

Apply in thin, even coats following the Top Coat TDS, allowing proper flash-off between layers.

LeTech Thickening Agent – Professional Polyurethane Viscosity Modifier

The LeTech Thickening Agent (Expert Line) is a high-performance functional additive engineered from synthetic polyurethanes. Developed with professional British restoration heritage, this solution is designed to precisely adjust the viscosity and rheological properties of aqueous polyurethane dispersions. It is an essential component for restoration specialists and automotive detailers requiring granular control over the consistency of leather dyes, protective top coats, and repair compounds.

Advanced Viscosity Control for Professional Restoration

This technical additive allows professionals to modify the flow characteristics of leather coatings without compromising the integrity of the original formula. Whether increasing the body of a top coat for vertical applications or creating high-build finishes for patent leather, the Thickening Agent ensures a stable, predictable result. The formula is specifically optimized to prevent sagging and minimize splatter during spray or sponge applications.

Professional Applications

Automotive Interiors

Ideal for refining the consistency of dyes used on bolstered seats, steering wheels, and door panels where precision and run-prevention are critical.

Furniture Restoration

Provides the necessary body for applying top coats to vertical surfaces of luxury sofas and chairs, ensuring an even, drip-free finish.

Marine Interiors

Engineered to withstand the rigorous demands of marine upholstery restoration, allowing for thick, protective barriers on heavy-use surfaces.

Private Aviation

Meets the exacting standards required for the restoration of premium aircraft leather, maintaining material flexibility and transparency.

Luxury Leather Goods

Essential for achieving the "super-gloss" aesthetic required for patent leather footwear and high-end handbags when mixed with gloss top coats.

Why Professionals Choose LeTech

LeTech represents the pinnacle of British restoration standards. Unlike retail-grade additives, the Expert Line Thickening Agent maintains total transparency and does not alter the color accuracy of the base product. It preserves the drying time and intercoat adhesion of the leather finish, ensuring that the structural integrity of the repair remains uncompromised. This professional reliability reduces material waste and labor time, providing significant cost savings compared to component replacement.

Technical Specifications

• Surface Compatibility: Natural leather, bonded leather, and vinyl (when used with compatible LeTech coatings).
• Finish Type: Maintains the original finish of the base product (Gloss, Matte, or Satin).
• Drying Time: Does not affect the standard curing cycle of polyurethane coatings.
• Coverage: Highly concentrated; 1% to 5% addition rate by volume.
• Durability: High-grade synthetic polyurethane ensures long-term film stability.
• Application Method: Direct integration into liquid coatings via thorough mechanical mixing.

BENEFITS

• Precision Restoration: Achieve the exact thickness required for specialized repair techniques.
• Zero Color Shift: Formulated to remain 100% transparent upon curing.
• Anti-Sagging Properties: Facilitates heavy application on vertical surfaces without runs or drips.
• Cost Efficiency: Extends the utility of standard dyes and coats for specialized high-build tasks.
• Maintained Adhesion: Does not weaken the bond between leather fibers and the coating layers.

HOW TO USE

1. Preparation: Ensure the base product (Leather Colourant, Top Coat, or Filler) is clean and ready for mixing.
2. Dosage: Introduce the Thickening Agent at a ratio of 1% to 5% of the total volume. Do not exceed 5% to avoid excessive viscosity.
3. Mixing: Stir thoroughly to ensure even distribution of the agent throughout the medium. No pre-dilution is required.
4. Testing: Always conduct a small-scale test on an inconspicuous area to verify the desired flow and finish.
5. Application: Apply the thickened mixture using a sponge, brush, or specialized spray equipment according to the base product's instructions.
6. Safety: Work in a well-ventilated area. Use professional-grade PPE as recommended for polyurethane handling.

LETECH LEATHER CROSS LINKER X STRONG

A reinforced professional crosslinker designed for waterborne polyurethane systems where maximum durability, hardness, and chemical resistance are required. Engineered for high-load automotive, aviation, and furniture applications, it elevates coating strength and long-term performance to an industrial-grade level.

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Signature Advantages

• Reinforced formula that strengthens the polymer network for extreme durability

• Significant improvement in hardness, chemical resistance, and wear stability

• Designed for waterborne PU Primer, Colourant, and Top Coat systems

• Maintains coating integrity under heavy use, friction, and repeated cleaning cycles

• Professional-grade performance for demanding leather finishing environments

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Created for Professionals

• Automotive interiors — steering wheels, bolsters, seats, and high-contact panels

• Aviation and marine — UV exposure, temperature shifts, and aggressive cleaning cycles

• Furniture and contract environments — high-traffic areas requiring long-term durability

• OEM and restoration workflows needing reliable, industrial-strength leather coatings

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Usage Notes

Mix Leather Cross Linker X Strong into Primer, Colourant, or Top Coat immediately before application. Use freshly prepared solutions to ensure optimal crosslinking. Warm air between coats can assist the curing process (refer to TDS for exact parameters).

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Refined Result

A dense, reinforced polymer network that delivers long-lasting coating hardness, chemical resistance, and superior wear protection—ensuring a stable, durable finish across high-stress leather surfaces.