How to Repair with V-Cut Method

Method

1, Before treatment

How the surface looks before getting treated.

2, V cut with a grinder

Cut in a V shape along the crack.

3, Resin-based repair material treatment

Use a wire brush or an electric blower to completely remove dust and apply a resin primer. Fill with plastic mortar about 1mm higher than the surface to prevent the air from entering.

4, Surface treatment

Wait for about 2 hours to let it dry thoroughly. After hardening, grind with a #36 grindstone to make it the same level as the surface.

5, Repair material treatment

After cleaning, apply the cement primer first, then apply Repair Resin. Apply them as you are filling small dents.

6, Scraping

When Repair Resin is semi-dry, scrape off the excess material with a scraper. Scrub with sandpaper as well to make sure there are no scraps.

7, Lining material treatment

Apply the cement primer, then apply C Repair Lining on top of that. Allow it to dry, then scrape off the border with a scraper, and blend the surface with #600 sandpaper.

8, Spraying

Spray a small amount of C Repair Color, let it dry, and check the color. Repeat the process until the color matches the surroundings.

9, Adding patterns

Scrub the surface with #600 sandpaper. Add patterns to match surroundings.

Tools to prepare

• Trowel(1〜2mm)
• Metal trowel
• Bowl
• Scraper
• Waterproof sandpaper #600
• Wier brush
• Small bucket
• Brush
• Wiping cloth
• Wagner FLEXIO 570
• Air compressor
• Air hose
• Air gun
• Pattern Pad
• Gas torch
• Electric blower
• Grinder
• Grindstone #16, #18
• Crack chaser diamond disc saw blade for v cut

Materials to prepare

• Repair Resin
• C Repair Lining
• C Repair Color
• Tone Color
• Cement primer(Royal W21 diluted about 20 times with water, etc,)
• Resin repair material(Alpron HM, etc,)
• Resin primer(Alpron W301, etc,)

Notes

• All Repair Resin products are pre-mixed and only use water for kneading. Please note that the curing time and color may differ if any adhesives are mixed.
• Once it’s mixed with water, please use it all. Re-watering or kneading once curing has started may cause cracks and poor adhesion.
• Because it’s cement-based, it is subject to weathering and moisture absorption. Please store with care and use as soon as possible. (The 5kg inner bag is heat-sealed to improve shelf life. Please use the rubber band attached for sealing any leftover products.)
• When repairing, remove the excess unevenness of the surface beforehand with a hammer, chisel, scraper, etc., and clean it. If the mold releasing agent remains on the surface, it’ll peel off easily. Use a brush to scrub the surface and moisten it with water for the best results.
• Please be careful when handling a scraper or a metal trowel, as they may cut your hand.
• Please read the instructions and notes of C Repair Lining and C Repair Color.
• After adding the Mixing Liquid into C Repair Color, please use it all within 24 hours.
• Cover and protect the area where you don’t wish to spray paint beforehand.
• If it adheres to any unwanted area, wipe it off with a wet wiping cloth.
• Please make sure to mix C Repair Color thoroughly before use. If it’s not fully mixed, it may cause unevenness.
• Spray C Repair Color little at a time in thin layers. If you spray too thickly at once, it may drop, and the finished look will not look as good. Please repeat the process of “Spray → Dry → Spray” until the surface is fully covered.
• When adding patterns, tap lightly and inconsistently according to the surrounding patterns.

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