---
product_id: 15353066
title: "SEM 39783 Weld-Thru Primer - 13 oz."
brand: "sem"
price: "A$109"
currency: AUD
in_stock: true
reviews_count: 8
url: https://www.desertcart.com.au/products/15353066-sem-39783-weld-thru-primer-13-oz
store_origin: AU
region: Australia
---

# Fast 20-min full cure Up to 240 sq.ft. coverage Zinc-enriched corrosion defense SEM 39783 Weld-Thru Primer - 13 oz.

**Brand:** sem
**Price:** A$109
**Availability:** ✅ In Stock

## Summary

> 🛠️ Prep Like a Pro, Weld Like a Boss!

## Quick Answers

- **What is this?** SEM 39783 Weld-Thru Primer - 13 oz. by sem
- **How much does it cost?** A$109 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.com.au](https://www.desertcart.com.au/products/15353066-sem-39783-weld-thru-primer-13-oz)

## Best For

- sem enthusiasts

## Why This Product

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

## Key Features

- • **Matte Gray Finish:** Professional-grade, neutral matte finish that blends seamlessly under any topcoat.
- • **Precision Coverage:** Cover up to 240 sq.ft. with two coats—maximize efficiency and minimize waste.
- • **Aerosol Convenience:** Easy spray application for smooth, even primer layers on all metal surfaces—outdoor-ready.
- • **Zinc-Enriched Armor:** Protect your projects with advanced corrosion resistance that stands the test of time.
- • **Rapid Cure, Ready to Weld:** Get your metal prepped and primed in just 20 minutes—no downtime, no delays.

## Overview

The SEM 39783 Weld-Thru Primer is a 13 oz. aerosol automotive primer designed for metal surfaces. Featuring a fast 20-minute full cure time and zinc-enriched formula, it offers superior corrosion resistance and water repellency. With coverage up to 240 sq.ft. for two coats and a matte gray finish, it ensures efficient, professional-grade preparation for welding and painting projects.

## Description

SEM 39783 Weld-Thru Primer - 13 oz.

## Features

- New

## Technical Specifications

| Specification | Value |
|---------------|-------|
| Brand | SEM |
| Color | Gray |
| Finish Type | Matte |
| Size | 13 Ounce (Pack of 1) |
| Item Volume | 13 Milliliters |
| Unit Count | 13.0 Ounce |
| Paint Type | automotive-paint-primer |
| Surface Recommendation | Metal |
| Indoor/Outdoor Usage | Outdoor |
| Item Form | Aerosol |
| Age Range (Description) | Adult |
| Is Waterproof | False |
| Model Name | 39783 |
| Package Information | Can |
| Color Code | #808080 |
| Full Cure Time | 20 Minutes |
| Coverage | 192-240 sq. ft. for two coats |
| Water Resistance Level | Water Repellent |
| UPC | 646786397837 |
| Global Trade Identification Number | 00646786397837 |
| Manufacturer | SEM |
| Dry Time In Hours | 0.33 |
| Item Weight | 15.2 ounces |
| Product Dimensions | 8 x 4 x 4 inches |
| Item model number | 39783 |
| Is Discontinued By Manufacturer | No |
| Exterior | Zinc Enriched |
| Manufacturer Part Number | 39783 |

## Product Details

- **Brand:** SEM
- **Color:** Gray
- **Finish Type:** Matte
- **Size:** 13 Ounce (Pack of 1)
- **Item Volume:** 13 Milliliters
- **Unit Count:** 13.0 Ounce
- **Paint Type:** automotive-paint-primer
- **Surface Recommendation:** Metal
- **Indoor/Outdoor Usage:** Outdoor
- **Item Form:** Aerosol

## Images

![SEM 39783 Weld-Thru Primer - 13 oz. - Image 1](https://m.media-amazon.com/images/I/81QSJ1ZoYTL.jpg)

## Customer Reviews

### ⭐⭐⭐⭐⭐ Good fan pattern on spray nozzle
*by R***B on January 29, 2023*

Good fan spray from nozzle. Goes on like high build primmer

### ⭐⭐⭐⭐⭐ Everyone knows it’s good
*by S***D on December 20, 2022*

Just another buyer that likes this product.

### ⭐⭐⭐⭐ Good but sprays to fast
*by P***G on September 18, 2018*

The formula seems to have changed on this. Sprays almost to fast. Maybe it was a tip change

## Frequently Bought Together

- SEM 39783 Weld-Thru Primer - 13 oz.
- Clean Sheets - CLN-CS100 Superior Mixing Pad (12x12) - 100 Disposable Sheets FOR Toughest Job, Clear
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**Shop now:** [https://www.desertcart.com.au/products/15353066-sem-39783-weld-thru-primer-13-oz](https://www.desertcart.com.au/products/15353066-sem-39783-weld-thru-primer-13-oz)

---

*Product available on Desertcart Australia*
*Store origin: AU*
*Last updated: 2026-02-02*