---
product_id: 11775581
title: "39683 Grey Self Etching Primer - 15.5 oz."
brand: "sem"
price: "23335 Ft"
currency: HUF
in_stock: true
url: https://www.desertcart.hu/products/11775581-39683-grey-self-etching-primer-15-5-oz
store_origin: HU
region: Hungary
---

# Water-resistant matte finish for durable protection 15.5 oz aerosol can for precise application Self-etching primer bonds directly to steel & aluminum 39683 Grey Self Etching Primer - 15.5 oz.

**Brand:** sem
**Price:** 23335 Ft
**Availability:** ✅ In Stock

## Summary

> 🛠️ Prime like a pro — bond, protect, and perfect every metal surface!

## Quick Answers

- **What is this?** 39683 Grey Self Etching Primer - 15.5 oz. by sem
- **How much does it cost?** 23335 Ft with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.hu](https://www.desertcart.hu/products/11775581-39683-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

- • **Made in the USA:** Proudly manufactured domestically, guaranteeing quality and reliability you can trust.
- • **Matte Grey Finish:** Professional-grade matte grey finish provides an ideal base for automotive and industrial coatings.
- • **Superior Metal Adhesion:** Self-etching formula chemically bonds to steel and aluminum for long-lasting durability.
- • **Precision Aerosol Delivery:** Compact 15.5 oz can ensures controlled, mess-free application every time.
- • **Water-Resistant Protection:** Engineered to resist moisture, extending the lifespan of your metal restoration projects.

## Overview

The SEM 39683 Grey Self Etching Primer is a 15.5 oz aerosol designed for automotive repair, metal restoration, and industrial coatings. Its self-etching formula ensures superior adhesion to steel and aluminum surfaces, delivering a durable, water-resistant matte grey finish. Made in the USA, this primer offers excellent coverage and professional-grade performance for lasting protection.

## Description

SEM 39683 Grey Self Etching Primer - 15.5 oz.

## Features

- Part Number: 39683
- Country Of Origin: United States
- Package Dimensions: 6.35 L X 6.35 W X 23.622 H (Centimeters)
- Package Weight: 0.567 Kilograms

## Technical Specifications

| Specification | Value |
|---------------|-------|
| Brand | SEM |
| Color | Grey |
| Finish Type | Matte |
| Size | 15.5 Ounce (Pack of 1) |
| Unit Count | 15.5 Ounce |
| Paint Type | Etching Primer |
| Specific Uses For Product | automotive repair and refinishing, metal restoration projects, industrial coating applications |
| Surface Recommendation | Steel, Aluminum |
| Item Form | Aerosol |
| Age Range (Description) | Adult |
| Is Waterproof | False |
| Model Name | 39683 |
| Package Information | Can |
| Color Code | #808080 |
| Coverage | Excellent |
| Water Resistance Level | Water Resistant |
| UPC | 646786396830 |
| Global Trade Identification Number | 00646786396830 |
| Manufacturer | SEM |
| Item Weight | 1 pounds |
| Product Dimensions | 2.75 x 2.75 x 9.25 inches |
| Item model number | 39683 |
| Is Discontinued By Manufacturer | No |
| Exterior | Aluminum |
| Manufacturer Part Number | 39683 |

## Product Details

- **Brand:** SEM
- **Color:** Grey
- **Finish Type:** Matte
- **Size:** 15.5 Ounce (Pack of 1)
- **Unit Count:** 15.5 Ounce
- **Paint Type:** Etching Primer
- **Specific Uses For Product:** automotive repair and refinishing, metal restoration projects, industrial coating applications
- **Surface Recommendation:** Steel, Aluminum
- **Item Form:** Aerosol
- **Age Range (Description):** Adult

## Images

![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.

## Frequently Bought Together

- SEM 39683 Grey Self Etching Primer - 15.5 oz.
- J-B Weld WaterWeld, 1 Hour Cure, Epoxy Putty Stick - 2 Pack, Off-White (8277-2)
- Pond Armor SKU-SKYBLUE-QT-R Non-Toxic Pond Shield Epoxy Paint, 1.5-Quart, Sky Blue, 48 Fl Oz (Pack of 1)

---

## 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.hu/products/11775581-39683-grey-self-etching-primer-15-5-oz](https://www.desertcart.hu/products/11775581-39683-grey-self-etching-primer-15-5-oz)

---

*Product available on Desertcart Hungary*
*Store origin: HU*
*Last updated: 2026-01-23*