Product

SHELL MACHINE Mold repair compound

CRACK SEALER 520

Purpose

An inorganic adhesive specifically designed for filling gaps in mold parting surfaces.

Application: Flash prevention

・Filling gaps in die-cast mold parting surfaces
・Repairing cracks in various casting molds

Features

Prevents Flash Generation Fills gaps in mold parting surfaces, effectively preventing flash formation.
Low-Organic, Inorganic Binder System Formulated with a metal alkoxide-based binder, it contains minimal organic content and becomes inorganic after curing.
Non-Sagging Paste Consistency Its non-sagging consistency allows for reliable filling even on vertical surfaces.
Non-Flammable with Heat Resistance Above 1400°C Can be applied to areas in direct contact with molten aluminum.
Viscosity Can Be Adjusted as Needed Viscosity can be adjusted with a dedicated thinner, enabling easy application even in narrow gaps.
Heat Resistance Temperature 1400°C

How to use

1. Thoroughly degrease the application surface to remove any oil. For better adhesion, roughen the surface with sandpaper or similar.
After degreasing, heat the area with a heat gun or similar to remove any remaining moisture or oil.
Since the product has high viscosity in its original form, dilute with the dedicated thinner when applying to narrow gaps.
Add 5~10% thinner by weight relative to the crack sealer and mix thoroughly.
2. Stir the product well before use, as separation between solid and liquid components may occur.
3. Apply an appropriate amount using a spatula, trowel, dropper, or similar tool to fill the target area.
4. Allow to dry at room temperature for at least 24 hours.
For improved properties, heat curing is recommended:
Room temperature → 50°C (10 min) → 80°C (10 min) → 120°C (10 min).
This process enhances strength and adhesion.
(If heat curing is not possible, room temperature drying is acceptable.)
5. After sufficient drying, remove any excess material and smooth the surface using sandpaper or similar.

Handling Precautions

[Crack Sealer 520 – Main Component Composition]
Aluminum oxide, butanol, methanol (5%), metal alkoxide condensate
Applicable Regulations: Hazardous Materials Class 2 (Flammable Solids), Industrial Safety and Health Act (Methanol)
[Thinner – Main Component Composition]
Butanol, ethyl acetate
Applicable Regulations: Hazardous Materials Class 4, Class I Petroleum, Industrial Safety and Health Act (Ethyl Acetate)
・Stir well before use.
・Store in a cool, dark place away from high temperature and humidity.
・When handling, wear appropriate protective equipment to avoid contact with skin and eyes.
・Do not add water under any circumstances.
・After opening, tightly close the container for storage.

Packaging

Main agent: 200 g
Thinner: 80 g

CONTACT

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Tel +81-725-45-2217

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