---
product_id: 451009358
title: "Black Gelcoat with Wax Pint with 15cc Hardener (MEKP)"
brand: "fiberglass supply depot"
price: "¥12629"
currency: JPY
in_stock: true
category: "Fiberglass Supply Depot"
url: https://www.desertcart.jp/products/451009358-black-gelcoat-with-wax-pint-with-15cc-hardener-mekp
store_origin: JP
region: Japan
---

# High strength & 5.5-6.5% tensile elongation Compatible with polyester resin pigments Superior water & blister resistance Black Gelcoat with Wax Pint with 15cc Hardener (MEKP)

**Brand:** fiberglass supply depot
**Price:** ¥12629
**Availability:** ✅ In Stock

## Summary

> 🖤 Seal it strong, shine long – the black gelcoat pros trust!

## Quick Answers

- **What is this?** Black Gelcoat with Wax Pint with 15cc Hardener (MEKP) by fiberglass supply depot
- **How much does it cost?** ¥12629 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.jp](https://www.desertcart.jp/products/451009358-black-gelcoat-with-wax-pint-with-15cc-hardener-mekp)

## Best For

- fiberglass supply depot enthusiasts

## Why This Product

- Trusted fiberglass supply depot brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **All-in-One Kit:** Includes hardener, measuring cup & catalyst chart for precision
- • **Patch Like a Pro:** User-friendly application ideal for quick repairs and touch-ups
- • **Effortless Coverage:** High-viscosity formula covers 12.5 sq ft per pint with ease
- • **Durable & Weatherproof:** Exceptional water and blister resistance for outdoor longevity
- • **Flawless Finish, Zero Cracks:** High tensile elongation prevents cracking under stress

## Overview

Fiberglass Supply Depot Black Gelcoat with Wax Pint includes 15cc MEKP hardener and tools for precise application. Its NPG/Isophthalic polymer backbone delivers high strength, excellent water and blister resistance, and 5.5-6.5% tensile elongation to prevent cracking. The high-viscosity black gelcoat covers approximately 12.5 square feet per pint and is compatible with polyester resin pigments, making it perfect for durable, professional-grade exterior repairs and finishes.

## Description

desertcart.com : Fiberglass Supply Depot Black Gelcoat with Wax Pint with 15cc Hardener (MEKP) : Sports & Outdoors

## Features

- Exterior NPG/ISOPHTHALIC Grafted Polymer Backbone
- Black, Comes with Hardener, Measuring Cup and MEK P Catalyst Chart
- Good water and blister resistance High strength and hardness & 5.5-6.5% elongation in tensile ( i.e. No more cracking!)
- High-viscosity has great coverage. Compatible with pigments made specially for polyester resin or gelcoat.
- 1 Pint covers approximately 12.5 square feet Exceptionally easy patch & repair properties, user-friendly application properties

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B0B4352VLX |
| Best Sellers Rank | #81,666 in Sports & Outdoors ( See Top 100 in Sports & Outdoors ) #71 in Boat Painting Supplies |
| Brand Name | Fiberglass Supply Depot |
| Customer Reviews | 4.3 4.3 out of 5 stars (112) |
| Date First Available | June 14, 2022 |
| Item Package Dimensions L x W x H | 6.5 x 4.25 x 4.25 inches |
| Manufacturer | Fiberglass Supply Depot Inc. |
| Package Weight | 0.73 kg |

## Images

![Black Gelcoat with Wax Pint with 15cc Hardener (MEKP) - Image 1](https://m.media-amazon.com/images/I/61NUjed-P4L.jpg)

## Questions & Answers

**Q: Using this on Remote control car body in order to make it harder stiff and less resistant to bending at speed will this get hard applied to plastic?**
A: Polyesters will not stick to most plastics.

**Q: Can you apply rubbing compound after sanding this product?**
A: Yes. To get this super smooth and shiny I would recommend wet sanding starting at around 220 or 320 and work your way up to about 1200. Then start with the rubbing compounds. The other way is to use a product called duratec high gloss additive and spray the gelcoat. Then you won’t have to do as much wet sanding.

**Q: Do i need to use a product to make this thicker like paste to fill the holes and cracks?**
A: Yes, you can use cabosil to thicken the gelcoat.

**Q: Is this brushable**
A: Yes this can be brushed. Keep in mind that when brushing it will leave the brush marks. Sometimes its better to roll it on. If you want a nice smooth surface you will have to wet sand and polish afterwards.

## Frequently Bought Together

- Fiberglass Supply Depot Black Gelcoat with Wax Pint with 15cc Hardener (MEKP)
- TotalBoat-14409 Marine Gelcoat for Boat Building, Repair and Composite Coatings (White, Quart with Wax)
- TotalBoat Polyester Structural Repair Putty - Marine Grade Long Strand Fiber Fiberglass Reinforced Filler for Boat and Automotive Repair

---

## Why Shop on Desertcart?

- 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016
- 🌍 **Shop Globally** — Access 737+ million products across 21 categories
- 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price
- 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members)
- 🔒 **Secure Payments** — Trusted payment options with buyer protection
- ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews

**Shop now:** [https://www.desertcart.jp/products/451009358-black-gelcoat-with-wax-pint-with-15cc-hardener-mekp](https://www.desertcart.jp/products/451009358-black-gelcoat-with-wax-pint-with-15cc-hardener-mekp)

---

*Product available on Desertcart Japan*
*Store origin: JP*
*Last updated: 2026-10-18*