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Linda Hard Barrier X-OVER 

Linda Hard Barrier X-OVER
Set contents Hard Barrier X-OVER (50mL) x2
Sponge x6
”Application Complete” sticker x6
Certificate of Application x6

*This product contains 2 sets
*Estimated amount for application on regular passenger vehicle: 15mL approximately
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Product name [ordering code] Regular price Member price Qty
Linda Hard Barrier X-OVER (50ml×2)
[50057---]

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Product Description

*The following is from the manufacturer’s materials

Previous versions of Hard Barrier had to be applied in 2 or 3 applications, but Hard Barrier X-OVER succeeds in simultaneously forming a primer coating, a glass hardening coating, and a multi-layer fluorine coating in a single application. Hard Barrier X-OVER is a multi-layer structured glass coating which offers never-before-seen performance.

■High hardness coating:　hardness 7H

With its special proprietary manufacturing method, it can form a glass coating with a triple layer structure. It forms its tough yet flexible hard coating with high-quality polysilazane + highly concentrated siloxane + fluorine. *Hardness 7H (according to in-house testing)

Scratch resistance testing

After attaching a microfiber cloth to the surface roughness measurement device and rubbing it across each painted plate 2000 times, Hard Barrier X-OVER proved to have a strong physical effect and excellent scratch resistance.

■High gloss:　transparent heavy pressure membrane

Using carefully selected, high-quality, low-molecular-weight siloxane to completely fill in the imperfections in a painted surface provides a superior leveling effect. While preserving the natural beauty of the paint, it achieves a finish of the highest class, with a deep, elegant luster and advanced water-repellency which allows water to flow right off.

Checking the luster

Hard Barrier X-OVER had strong luster and shine.

■High durability

This product uses a carefully selected, high-quality glass component. Additionally, high-quality polysilazane + siloxane glass component + 3 types of composite fluorine are hybridized as a new technology in order to provide a stronger adhesion and greater durability. *Please confirm using the accelerated weather resistance test data.

Outdoor exposure test

Light from a xenon arc lamp was shone on the test surface using an accelerated weather resistance testing machine. The contact angle was measured every 150 hours. Hard Barrier X-OVER maintained hydrophobicity equivalent to approximately 1 year. (150 hours = 1 month equivalent)

Washing resistance test

Using a surface roughness testing machine, the surface was washed 400 times using our company’s UC-ECO 2%, and changes in the contact angle and fall angle were measured. Hard Barrier X-OVER maintained superior water-repellency and water shedding when compared to a vehicle with no application. *A higher value for contact angle indicates greater water-repellency, whereas a lower value for fall angle indicates greater water shedding capability.

■Dirt resistance

The TFI technology forms 3-dimensional bonds of 3 types of fluorine on the top coat, forming a special coating which protects from all types of external contaminants and offers maximum effectiveness.

Outdoor exposure test

The left half was coated and the sample was left outdoors for approximately 5 months. The coating of Hard Barrier X-OVER reduced the adhesion of contaminants due to the elements.

■Application method:　dry or wet

*Protective eyewear, rubber gloves, and rubber protective clothing must be worn when working with this product.


  • Washing and undercoat preparation:
  • 1. Remove any dirt from the vehicle by washing with a car shampoo.
  • 2. After rinsing clean with cold water, wipe the surface of the vehicle body.
  • 3. Prepare the undercoat as required by the state of the paint surface (removing iron dust, polishing, degreasing).

  • For dry application:
  • 1. Before applying the coating, remove any moisture from the body using an air blower.
  • 2. Take a suitable amount on a soft cloth or sponge and spread it evenly over the surface.
  • 3. Wet a soft cloth then wring out most of the moisture before using the damp cloth to wipe the surface. Then use a soft, dry cloth to wipe off any excess while checking for and correcting any unevenness.

  • For wet application:
  • 1. While the vehicle is still wet after washing, take a suitable amount on a soft cloth or sponge and spread it evenly over the surface.
  • 2. Perform the same tasks as in step 3. of the dry application process above.
  • *Please perform the application indoors (somewhere unaffected by the elements).
  • *Please perform the application separately for each panel: hood, roof, etc.
  • *The curing speed may vary due to humidity or temperature. Please check on the hardening process while you work.
  • *It takes 12 hours after application for a full cure. Please do not touch the surface or allow water to contact it during that period.
  • *Due to the properties of the products, sediment may appear. This does not indicate a quality issue.
Approximate start time for curing of coating
Summer and rainy season 15 minutes
Winter 35 minutes
Other 20 minutes