---
product_id: 492286193
title: "Custom Shop, Gray DTM High Build Urethane Primer Surfacer, 1-1/4 Quart Kit"
brand: "custom shop"
price: "$173.05"
currency: USD
in_stock: true
reviews_count: 8
category: "Custom Shop"
url: https://www.desertcart.us/products/492286193-custom-shop-gray-dtm-high-build-urethane-primer-surfacer-1
store_origin: US
region: United States of America
---

# Fast 3-Hour Dry Time 4:1 Mix Ratio Precision Anti-Corrosive Defense Custom Shop, Gray DTM High Build Urethane Primer Surfacer, 1-1/4 Quart Kit

**Brand:** custom shop
**Price:** $173.05
**Availability:** ✅ In Stock

## Summary

> 🛠️ Build it right, build it fast — the primer pros trust!

## Quick Answers

- **What is this?** Custom Shop, Gray DTM High Build Urethane Primer Surfacer, 1-1/4 Quart Kit by custom shop
- **How much does it cost?** $173.05 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.us](https://www.desertcart.us/products/492286193-custom-shop-gray-dtm-high-build-urethane-primer-surfacer-1)

## 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

- • **Fast-Track Workflow:** Dries in just 3 hours, letting you sand and topcoat faster to beat deadlines.
- • **High-Build Coverage:** Fill imperfections with ease—achieve a smooth, professional finish every time.
- • **Eco-Smart Performance:** Low 2.1 VOC formula keeps your workspace compliant without sacrificing power.
- • **Direct-to-Metal Mastery:** Skip the extra primers—adhere flawlessly to bare metal, aluminum, fiberglass, and more.
- • **Universal Compatibility:** Seamlessly pairs with top automotive paints like PPG, House of Kolor, and Valspar.

## Overview

Custom Shop Gray DTM High Build Urethane Primer Surfacer is a professional-grade, fast-drying urethane primer designed for direct application on metal and various substrates. Featuring a precise 4:1 mix ratio and a low 2.1 VOC formula, it delivers superior adhesion, corrosion resistance, and excellent sanding properties within just 3 hours of drying. Ideal for automotive and industrial refinishing, this primer ensures a durable, smooth base compatible with most topcoats, streamlining your project with eco-conscious compliance and high-build coverage.

## 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: Great DTM product and seller! - This DTM-B624 Primer worked great and stuck to all surfaces on my 1967 Camaro. It also took base coat really well. The product is great, but the tech support is even better! I called and asked questions multiple times and they were excellent customer service. It was my first full car paint job and I asked basic questions, but they more than wanted the help. I highly reccomend Restoration Shop DTM-B624 primer if you have some sand through and exposed metal, but even more so I reccomend TCP Global Corp and their great customer service!
Review: If hot use less kicker - Dries fast nice finish.

## 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 | #88,429 in Automotive ( See Top 100 in Automotive ) #56 in Automotive Primers |
| Brand | Custom Shop |
| Brand Name | Custom Shop |
| Color | Gray |
| Color Code | #808080 |
| Container Type | Can |
| Coverage | Anti-corrosive and adhesion protection |
| Customer Reviews | 4.5 out of 5 stars 159 Reviews |
| 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 Feature | Easy to Use, Fast-Drying, Low VOC |
| Special Features | Easy to Use, Fast-Drying, Low VOC |
| Specific Uses For Product | Interior/Exterior |
| Surface Recommendation | Metal |
| UPC | 840234512661 |
| Unit Count | 32 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 Fluid Ounces

## Images

![Custom Shop, Gray DTM High Build Urethane Primer Surfacer, 1-1/4 Quart Kit - Image 1](https://m.media-amazon.com/images/I/81Mhhg4K6wL.jpg)
![Custom Shop, Gray DTM High Build Urethane Primer Surfacer, 1-1/4 Quart Kit - Image 2](https://m.media-amazon.com/images/I/71KOgOAHiQL.jpg)
![Custom Shop, Gray DTM High Build Urethane Primer Surfacer, 1-1/4 Quart Kit - Image 3](https://m.media-amazon.com/images/I/91zB-0jt-qL.jpg)
![Custom Shop, Gray DTM High Build Urethane Primer Surfacer, 1-1/4 Quart Kit - Image 4](https://m.media-amazon.com/images/I/81XusezXpyL.jpg)
![Custom Shop, Gray DTM High Build Urethane Primer Surfacer, 1-1/4 Quart Kit - Image 5](https://m.media-amazon.com/images/I/810C+0CnecL.jpg)

## Available Options

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

## Customer Reviews

### ⭐⭐⭐⭐⭐ Great DTM product and seller!
*by R***E on September 29, 2024*

This DTM-B624 Primer worked great and stuck to all surfaces on my 1967 Camaro. It also took base coat really well. The product is great, but the tech support is even better! I called and asked questions multiple times and they were excellent customer service. It was my first full car paint job and I asked basic questions, but they more than wanted the help. I highly reccomend Restoration Shop DTM-B624 primer if you have some sand through and exposed metal, but even more so I reccomend TCP Global Corp and their great customer service!

### ⭐⭐⭐⭐⭐ If hot use less kicker
*by A***R on July 4, 2026*

Dries fast nice finish.

### ⭐⭐⭐⭐ Thick and a little hard to use unthinned
*by U***R on August 20, 2025*

Pretty thick. A 2.0 tip is needed un-thinned. I thinned with acetone @20 percent. 24 hrs later you can dry sand which works better than wet sanding. Primer clogs sandpaper wet or dry but the end result is good. Spraying unthinned is a thick coat and I tried letting it sit a few days with similar results sanding.

## Frequently Bought Together

- Custom Shop - Gray DTM High Build Urethane Primer Surfacer 2.1 VOC (1-1/4 Gallon Kit) High-Performance Direct to Metal Primer for Automotive and Industry use Kit= 1 Gal. of DTM Primer and 1 Qt. of Hardener
- TCP Global Premium Paint Mixing Essentials Kit with 12 Cups, 12 Sticks, 12 Paddles, 12 Strainers & Can Opener
- Restoration Shop UR70 Medium Urethane Reducer (Gallon) for Automotive Paint and Industrial Paint Use - High Performance Automotive Grade

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**Shop now:** [https://www.desertcart.us/products/492286193-custom-shop-gray-dtm-high-build-urethane-primer-surfacer-1](https://www.desertcart.us/products/492286193-custom-shop-gray-dtm-high-build-urethane-primer-surfacer-1)

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*Product available on Desertcart United States of America*
*Store origin: US*
*Last updated: 2026-08-23*