---
product_id: 265517976
title: "SEM 39683 Grey Self Etching Primer - 15.5 oz."
brand: "sem"
price: "SAR 251"
currency: SAR
in_stock: true
category: "Sem"
url: https://www.desertcart.com.sa/products/265517976-sem-39683-grey-self-etching-primer-15-5-oz
store_origin: SA
region: Saudi Arabia
---

# Matte grey finish for seamless refinishing Fast-Drying in 1 hour Superior adhesion to steel & aluminum SEM 39683 Grey Self Etching Primer - 15.5 oz.

**Brand:** sem
**Price:** SAR 251
**Availability:** ✅ In Stock

## Summary

> 🛠️ Prime Like a Pro, Finish Like a Boss

## Quick Answers

- **What is this?** SEM 39683 Grey Self Etching Primer - 15.5 oz. by sem
- **How much does it cost?** SAR 251 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.com.sa](https://www.desertcart.com.sa/products/265517976-sem-39683-grey-self-etching-primer-15-5-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

- • **Universal Metal Bond:** Self-etching formula ensures rock-solid adhesion on steel, aluminum, and stainless steel.
- • **Rapid Cure, Ready to Go:** Dries to full cure in just 1 hour—get back to work faster.
- • **Flawless Base for Perfection:** Ideal under primer surfacers and compatible with most paint systems for a smooth finish.
- • **Precision Aerosol Application:** 15.5 oz aerosol can delivers controlled, even coverage of 4.7-5.6 sq.m/liter.
- • **Trusted by Pros, Loved by DIYers:** Highly rated with 4.6 stars from 530+ users—join the community of automotive refinishing experts.

## Overview

The SEM 39683 Grey Self Etching Primer is a fast-drying, matte-finish aerosol primer designed for superior adhesion on steel, aluminum, and stainless steel surfaces. Perfect for automotive repair, metal restoration, and industrial coatings, it cures fully in 1 hour and provides excellent coverage, making it a trusted choice for professionals and enthusiasts alike.

## Description

Features Self Etching Primer Adheres to steel alum stainless steel For overall refinishing or spot repairs Formulated for use under primer surfacers and with most paint systems Colour - Gray Size - Aerosol Item Weight - 11 lbs Case Quantity - 12

## Features

- manufacturer: SEM
- Item Trademark: SEM
- Item Weight: pounds, pounds, 1.30, 1.30
- Item Category: Paint

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B000GTIRAU |
| ASIN  | B000GTIRAU |
| Age Range Description | Adult |
| Best Sellers Rank | #192,124 in Automotive ( See Top 100 in Automotive ) #32 in Primers |
| Brand Name | SEM |
| Color | Grey |
| Color Code | #808080 |
| Container Type | Aerosol Can |
| Coverage | 4.7-5.6 sq.m/liter |
| Customer Reviews | 4.6 4.6 out of 5 stars (530) |
| Customer reviews | 4.6 4.6 out of 5 stars (530) |
| Date First Available  | 10 August 2012 |
| Dry Time In Hours | 3 |
| Finish Type | Matte |
| Full Cure Time | 1 Hours |
| Global Trade Identification Number | 00646786396830 |
| Included Components | Aerosol Can |
| Indoor Outdoor Usage | Outdoor |
| Is Discontinued By Manufacturer  | No |
| Is Waterproof | False |
| Item Form | Aerosol |
| Item Volume | 65.66 Cubic Inches |
| Item Weight | 454 g |
| Item model number  | 39683 |
| Manufacturer | SEM |
| Manufacturer  | SEM |
| Model Name | 39683 |
| Model Number | 39683 |
| Paint Type | Etching Primer |
| Part Number | 39683 |
| Product Dimensions  | 6.99 x 6.99 x 23.5 cm; 453.59 g |
| Size | 15.5 Ounce (Pack of 1) |
| Special Features | Fast-Drying, Excellent Adhesion |
| Specific Uses For Product | automotive repair and refinishing, metal restoration projects, industrial coating applications |
| Surface Recommendation | Steel, Aluminum |
| UPC | 646786396830 |
| Unit Count | 15.5 Fluid Ounces |
| Water Resistance Level | Water Resistant |

## Product Details

- **Brand:** SEM
- **Colour:** Grey
- **Finish type:** Matte
- **Item volume:** 65.66 Cubic Inches
- **Size:** 15.5 Ounce (Pack of 1)

## Images

![SEM 39683 Grey Self Etching Primer - 15.5 oz. - Image 1](https://m.media-amazon.com/images/I/81s4Jypno6L.jpg)

## Questions & Answers

**Q: Why does SEM not recommend applying color directly to this primer?**
A: This is an etching primer. I, used it on Magnesium after etching with Borax and baking soda mixed. After drying I, used this prime 4 light coats over 4 days 1200 wet sand paper. I, then coated with primer for the paint !
3 coats wet sad 3 coats of final coat rubbed out with fine polishing compound.I, did this project in Nov 19.
So far so good.

**Q: What type of paint can be applied on top of the primer? any paint? sprays? water based? oil based? are there any restrictions?**
A: I would recommend staying with the same brand of paint for both primer and top coat. Although the SEM primer seems to work well with most top coats, I had a bad experience using it with a Rustoleum top coat. After priming bare aluminum with the SEM self-etch and letting it cure overnight, I applied a Rustoleum top coat. Within a few hours both the primer and the top coat pealed off. I spoke with the the SEM and the Rustoleum technical folks but neither knew exactly what caused this. Both, however, recommended sticking with the same brand for primer and top coat. I would recommend doing some test sprays, letting the primer cure the recommended length of time before applying the top coat. Note that the SEM self-etch is acetone based, and this might cause a problem with topcoats that use other bases, especially if the SEM has not been cured long enough.

**Q: I have stripped aluminum bare. self etching primer, then primer, then top coat? are all these these paints made by sem?**
A: All i can tel u that the image is sem

**Q: Is this the same as zinc chromate primer?**
A: I do not have the can anymore. So I cannot read the ingredients. However I do not think it contains zinc chromate...which is used for marine and auto applications. This stuff works great for bonding to bare aluminum parts that will need to be painted. Hope this helps.

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*Product available on Desertcart Saudi Arabia*
*Store origin: SA*
*Last updated: 2026-06-16*