MR. JO Gelkot-BLK : Black Epoxy Gelcoat for Molds, Foundry Patterns & High-Performance Tooling
When your mold or prototype requires a rugged surface, dimensional accuracy, and visual clarity, MR. JO Gelkot-BLK delivers on every front. This two-component, high-viscosity black epoxy gelcoat is designed for precision surface tooling, pattern making, and mold negatives where performance, finish, and durability matter. Whether you’re working in ceramics, foundry, or composite tooling, this system offers a smooth, solvent-free application with consistent, repeatable results.
âš« Key Features
🧴Thixotropic Paste: No sag, no drip — perfect for vertical surfaces and detailed contours.
đź•’Fast Curing: Reduces turnaround time without compromising quality.
🛡️High Hardness & Abrasion Resistance: Withstands daily wear in tooling environments.
🧪Excellent Chemical Resistance: Performs in harsh working conditions like ceramic foundries.
🌫️Dense Black Finish: Offers strong contrast for inspection and precision work.
🌱Solvent-Free: Safe to use indoors, minimal odor, clean to handle.
🧪 Technical Properties
| Property | Value |
| Color | Black |
| Mixing Ratio (PBW) | 100:16 |
| Pot Life @ 25°C | 20–30 minutes |
| Mixture Consistency | Thixotropic paste |
| Optics | Opaque |
| Cure Type | Room temperature |
🧰 Recommended Applications
🧱 Working Molds for Ceramics
A favorite in sanitaryware and fine ceramic industries for building smooth, defect-free working molds.
🧲 Negative & Laminating Molds
Acts as a tough, form-retaining outer skin for wet layups, fiberglass molds, and vacuum-formed tools.
⚙️ Foundry Patterns
Ideal for producing high-precision patterns for metal casting and control models.
🧠Master Models & Jigs
Perfect for creating dimensionally stable master patterns used in R&D or production fixtures.
🧪 Thin Casting Applications
Suited for shallow pour geometries requiring even flow, fast gel, and clean demolding.
🧷 Why Use MR. JO Gelkot-BLK?
- Tailored for Professionals
Built for ceramic, tooling, and molding industries that require form accuracy and surface integrity. - Brush-On Control with Paste-Like Flow
Spreads evenly with a spatula or brush without slumping — essential for vertical surfaces or complex molds. - Dark Finish = Sharp Inspection
The deep black finish helps spot surface defects during model prep or before layup. - Supports Composite Builds
Often used as the outermost skin in fiberglass/carbon composite molds for durability and polishability.
🔧 Usage Instructions
- Surface Prep: Ensure base model or mold is clean and dry.
- Mixing: Mix 100 parts resin with 16 parts hardener by weight thoroughly.
- Application: Apply with a brush or spatula in 1–2 mm thickness.
- Cure: Let it cure at room temperature. Avoid moisture or dust during initial curing hours.
- Top-Layer Lamination: Once tack-free, follow with lamination or casting as needed.
📦 Packaging & Availability
- Available in pre-measured kits for convenience.
- Custom sizes available on request for industrial orders.
⚠️ Storage & Safety
- Store at 18–25°C in dry, sealed containers.
- Use gloves and eye protection during use.
- Refer to SDS for handling and disposal guidelines.
MR. JO Gelkot-BLK is built for professionals who need robust performance, consistency, and clean finishing in every mold they build. Whether in ceramics, composites, or tooling, this epoxy gelcoat offers high-definition surfaces, chemical stability, and rapid productivity — all in a user-friendly, solvent-free package. With MR. JO Gelkot-BLK, your molds are ready to impress and perform.
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