---
product_id: 491282745
title: "Custom Shop - Gray DTM High Build Urethane Primer Surfacer (Direct to Metal) 2.1 VOC (1-1/4 Quart Kit) Fast Dry High-Performance Primer for Automotive & Industrial use Kit includes 1-1/4 Quart"
brand: "custom shop"
price: "฿6202"
currency: THB
in_stock: true
reviews_count: 8
category: "Custom Shop"
url: https://www.desertcart.co.th/products/491282745-custom-shop-gray-dtm-high-build-urethane-primer-surfacer-direct
store_origin: TH
region: Thailand
---

# Fast 3-hour dry time 4:1 easy mix ratio Superior anti-corrosion defense Custom Shop - Gray DTM High Build Urethane Primer Surfacer (Direct to Metal) 2.1 VOC (1-1/4 Quart Kit) Fast Dry High-Performance Primer for Automotive & Industrial use Kit includes 1-1/4 Quart

**Brand:** custom shop
**Price:** ฿6202
**Availability:** ✅ In Stock

## Summary

> 🛠️ Prime Fast, Finish Flawless – The Ultimate DTM Primer for Pros

## Quick Answers

- **What is this?** Custom Shop - Gray DTM High Build Urethane Primer Surfacer (Direct to Metal) 2.1 VOC (1-1/4 Quart Kit) Fast Dry High-Performance Primer for Automotive & Industrial use Kit includes 1-1/4 Quart by custom shop
- **How much does it cost?** ฿6202 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.co.th](https://www.desertcart.co.th/products/491282745-custom-shop-gray-dtm-high-build-urethane-primer-surfacer-direct)

## Best For

- custom shop enthusiasts

## Why This Product

- Trusted custom shop brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Built to Last:** Advanced anti-corrosive formula protects metal surfaces from rust and wear
- • **Speed Meets Precision:** Dries in just 3 hours for rapid project turnaround
- • **Effortless Application:** Simple 4:1 mix ratio streamlines prep and reduces waste
- • **Universal Compatibility:** Direct-to-metal primer works seamlessly with top automotive paint brands
- • **Eco-Conscious Performance:** Low 2.1 VOC compliant for use in regulated environments without sacrificing quality

## Overview

Custom Shop Gray DTM High Build Urethane Primer Surfacer is a professional-grade, fast-drying primer designed for direct application on metal and various substrates. Featuring a 4:1 mix ratio and low 2.1 VOC, it delivers superior adhesion, corrosion resistance, and excellent sanding properties within 3 hours. Ideal for automotive and industrial refinishing, it supports a smooth, durable base for topcoats while meeting strict environmental standards.

## Description

Custom Shop - Gray DTM High Build Urethane Primer Surfacer (Direct to Metal) 2.1 VOC (1-1/4 Quart Kit) is a professional-grade, high-performance primer system engineered for superior adhesion, corrosion resistance, and durability. Specially formulated to be applied directly to metal surfaces, this Direct to Metal (DTM) urethane primer surfacer eliminates the need for a separate etching or epoxy primer, saving time without compromising quality. Ideal for automotive refinishing, industrial applications, restoration projects, and custom builds, this product delivers outstanding performance in demanding environments. This 2-component urethane primer surfacer provides excellent fill, leveling, and sandability, making it perfect for use over bare metal, fiberglass, body fillers, existing finishes, and properly prepared substrates. The fast-drying formula ensures efficient workflow and minimizes downtime in high-volume shops or individual garages. Once cured, the primer creates a tough, durable surface that resists moisture, chemicals, and UV exposure, laying a strong foundation for basecoats or topcoats. The included kit contains 1 quart of Gray DTM Primer and 1/4 quart of activator, mixed in a simple 4:1 ratio. With its 2.1 VOC compliance, it meets strict environmental regulations, making it suitable for use in low-emission zones while maintaining professional-grade performance. Custom Shop’s commitment to quality ensures consistent results, whether you're spraying a full respray, touch-up, or custom fabrication. Key Features: High-build urethane primer surfacer, Direct to Metal (DTM) application—no epoxy or etch required, Excellent adhesion, fill, and corrosion resistance, Fast drying and easy to sand, 2.1 VOC compliant for environmentally regulated areas, Ideal for automotive and industrial applications, Mix ratio: 4:1 (Primer:Activator), Kit includes 1 Quart Primer + 1/4 Quart Activator.

Review: Nice product to work with - This product worked very well in my garage
Review: Great product for the money - ive used this primer once and i love it. I used it on a 90 degree day, using a hvlp harbor freight spray gun, i sprayed at 30psi to the tip and used a 1.7mm needle and tip. the primer was drying before it even hit the car ( due to the 90 degree temp). But even then, it still stuck and created a nice layer of primer. After sanding with 600 grit to get the texture feel out of the primer, it still covered the car and sanded very nicely. Next coat will be sprayed with a 2.0mm tip and needle to help prevent the paint from drying before it hits the car.

## Features

- Custom Shop – DTM Series High Build Urethane Direct to Metal Primer Surfaceris a 4 to 1 Mix Ratio high performance primer specifically designed to be used DTM (Direct to Metal) . DTM Series Primer contains an advanced resin technology system that offers superior adhesion to Bare Metal, Steel, Bare Aluminum, Fiberglass, Gelcoat, Body Fillers and many properly prepared Rigid Plastics and sanded OEM Finishes.
- DTM High Build Primer is Lead and Chromate Free and its formulation contains a rich blend of Anti-Corrosive additives to achieve maximum defense against rust and corrosion while adding the benefit of outstanding adhesion. DTM also offers easy High Build Properties and is a fast dry product. Easy to Sand in as soon as 3 hours
- Custom Shop – DTM Series Primer is great as a DTM primer with an easy 4 to 1 Mix Ratio. And a low 2.1 Voc that can be used Coast to Coast
- DTM Primer Surfacer is Available in Primer Gray with 1-1/4 Quart and 1-1/4 Gallon kits available. Great for Automotive and Industrial applications. DTM is compatible with and can be top coated with most Automotive Paint brands like Custom Shop, Restoration Shop, PPG, House of Kolor, Valspar, etc.
- Custom Shop DTM High Buid Primer Surfacer offers superior sanding characteristics and excellent Topcoat Gloss holdout. Allow prime 2-3 hours drytime before sanding and topcoating.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B0BJ3328QN |
| Age Range Description | Adult |
| Best Sellers Rank | #135,639 in Automotive ( See Top 100 in Automotive ) #76 in Automotive Primers |
| Brand Name | Custom Shop |
| Color | Gray |
| Color Code | #808080 |
| Container Type | Can |
| Coverage | Anti-corrosive and adhesion protection |
| Customer Reviews | 4.5 4.5 out of 5 stars (155) |
| Dry Time In Hours | 3 |
| Finish Type | Gloss |
| Full Cure Time | 3 Hours |
| Indoor Outdoor Usage | Outdoor |
| Is Waterproof | False |
| Item Form | Liquid |
| Item Volume | 1.25 Quarts |
| Manufacturer | Custom Shop |
| Paint Dilution Percentage | 20 |
| Paint Type | Urethane |
| Part Number | CUS KIT-DTM-HB624-QT |
| Size | 32 Fl Oz (Pack of 1) |
| Special Features | Easy to Use, Fast-Drying, Low VOC |
| Specific Uses For Product | Interior/Exterior |
| Surface Recommendation | Metal |
| UPC | 840234512661 |
| Unit Count | 32.0 Fluid Ounces |
| Water Resistance Level | Water Resistant |

## Product Details

- **Brand:** Custom Shop
- **Color:** Gray
- **Finish Type:** Gloss
- **Item Volume:** 1.25 Quarts
- **Paint Type:** Urethane
- **Size:** 32 Fl Oz (Pack of 1)
- **Special Feature:** Easy to Use, Fast-Drying, Low VOC
- **Specific Uses For Product:** Interior/Exterior
- **Surface Recommendation:** Metal
- **Unit Count:** 32.0 Fluid Ounces

## Images

![Custom Shop - Gray DTM High Build Urethane Primer Surfacer (Direct to Metal) 2.1 VOC (1-1/4 Quart Kit) Fast Dry High-Performance Primer for Automotive & Industrial use Kit includes 1-1/4 Quart - Image 1](https://m.media-amazon.com/images/I/81Mhhg4K6wL.jpg)

## Available Options

This product comes in different **Size** options.

## Customer Reviews

### ⭐⭐⭐⭐⭐ Nice product to work with
*by M***K on January 3, 2026*

This product worked very well in my garage

### ⭐⭐⭐⭐⭐ Great product for the money
*by R***S on September 3, 2023*

ive used this primer once and i love it. I used it on a 90 degree day, using a hvlp harbor freight spray gun, i sprayed at 30psi to the tip and used a 1.7mm needle and tip. the primer was drying before it even hit the car ( due to the 90 degree temp). But even then, it still stuck and created a nice layer of primer. After sanding with 600 grit to get the texture feel out of the primer, it still covered the car and sanded very nicely. Next coat will be sprayed with a 2.0mm tip and needle to help prevent the paint from drying before it hits the car.

### ⭐⭐⭐⭐ Very thick filler
*by M***C on October 8, 2024*

Like thickness, and stretched it further by needing to add additional reducer. Comes with hardener. But at 4:1:1, you’ll need a 3.0 tip and 50psi just to shoot. I doubled up on reducer and with 2.0 tip @25psi, and almost wide open, 80*, shoots flat, and a few thin coats, build up is great and good adhesion. You need to work out what’s best for you. There are better filler primers, but this is consistent.

## Frequently Bought Together

- Custom Shop - Gray DTM High Build Urethane Primer Surfacer (Direct to Metal) 2.1 VOC (1-1/4 Quart Kit) Fast Dry High-Performance Primer for Automotive & Industrial use Kit includes 1-1/4 Quart of DTM Primer
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**Shop now:** [https://www.desertcart.co.th/products/491282745-custom-shop-gray-dtm-high-build-urethane-primer-surfacer-direct](https://www.desertcart.co.th/products/491282745-custom-shop-gray-dtm-high-build-urethane-primer-surfacer-direct)

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*Product available on Desertcart Thailand*
*Store origin: TH*
*Last updated: 2026-06-09*