--- product_id: 265517976 title: "39683 Grey Self Etching Primer - 15.5 oz." brand: "sem" price: "€ 100.28" currency: EUR in_stock: true reviews_count: 5 category: "Sem" url: https://www.desertcart.hr/products/265517976-39683-grey-self-etching-primer-15-5-oz store_origin: HR region: Croatia --- # Matte grey finish for a flawless base Fast drying in just 3 hours Self-etching formula for superior metal bonding 39683 Grey Self Etching Primer - 15.5 oz. **Brand:** sem **Price:** € 100.28 **Availability:** ✅ In Stock ## Summary > ⚡ Prime Like a Pro — Fast, Flawless, and Fiercely Durable! ## Quick Answers - **What is this?** 39683 Grey Self Etching Primer - 15.5 oz. by sem - **How much does it cost?** € 100.28 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.hr](https://www.desertcart.hr/products/265517976-39683-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 - • **Matte Grey Perfection:** Provides a smooth, neutral base that enhances paint adhesion and ensures a flawless finish every time. - • **Trusted by Pros & DIYers:** Highly rated with 4.7 stars from 541 reviews, delivering consistent, reliable results for automotive and industrial projects. - • **Unmatched Metal Adhesion:** Self-etching primer that bonds seamlessly to steel, aluminum, and stainless steel for long-lasting durability. - • **Speedy Project Turnaround:** Dries to the touch in 3 hours and fully cures in just 1 hour, keeping your workflow efficient and on schedule. - • **Professional-Grade Coverage:** Generous 15.5 oz aerosol can covers up to 5.6 sq.m/liter, perfect for both spot repairs and full refinishing. ## Overview The SEM 39683 Grey Self Etching Primer is a fast-drying, aerosol-applied primer designed for superior adhesion to bare metals including steel and aluminum. With a matte grey finish and coverage of up to 5.6 sq.m/liter, it provides a durable, corrosion-resistant base ideal for automotive refinishing and metal restoration. Trusted by professionals and DIY enthusiasts alike, it dries in 3 hours and fully cures in 1 hour, ensuring efficient project completion with consistent, high-quality results. ## 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 Review: reliable, and high-quality results every time! - This primer is fantastic! It adheres perfectly to bare metal, providing a smooth, durable base for paint. The self-etching formula ensures excellent corrosion resistance and strong bonding. Easy to apply and dries quickly. The 15.5 oz can offers great coverage. Highly recommend for professional or DIY auto projects—consistent, reliable, and high-quality results every time! Review: Perfect Primer for Flawless Metal Paint Jobs - This primer is absolutely fantastic! It creates a seamless base on bare metal, ensuring a smooth and long-lasting surface for painting. With its self-etching formula, it delivers outstanding corrosion resistance and excellent adhesion. Application is a breeze, and it dries in no time. The 15.5 oz can provides excellent coverage for various projects. I highly recommend it for both professional and DIY auto tasks—it delivers consistent, reliable, and top-notch results without fail! ## Features - manufacturer: SEM - Item Trademark: SEM - Item Weight: pounds, pounds, 1.30, 1.30 - Item Category: Paint ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B000GTIRAU | | Age Range Description | Adult | | Best Sellers Rank | #230,698 in Automotive ( See Top 100 in Automotive ) #39 in Primers | | Brand | SEM | | Brand Name | SEM | | Color | Grey | | Color Code | #808080 | | Colour | Grey | | Container Type | Aerosol Can | | Coverage | 4.7-5.6 sq.m/liter | | Customer Reviews | 4.7 out of 5 stars 541 Reviews | | Dry Time In Hours | 3 | | Finish Type | Matte | | Finish type | Matte | | Full Cure Time | 1 Hours | | Global Trade Identification Number | 00646786396830 | | Included Components | Aerosol Can | | Indoor Outdoor Usage | Outdoor | | Is Waterproof | False | | Item Form | Aerosol | | Item Volume | 65.66 Cubic Inches | | Item Weight | 1 Pounds | | Item volume | 65.66 Cubic Inches | | Manufacturer | SEM | | Model Name | 39683 | | Model Number | 39683 | | Paint Type | Etching Primer | | Part Number | 39683 | | Size | 15.5 Ounce (Pack of 1) | | Special Features | Fast-Drying, Excellent Adhesion | | 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 ![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. ## Customer Reviews ### ⭐⭐⭐⭐⭐ reliable, and high-quality results every time! *by C***N on 8 May 2025* This primer is fantastic! It adheres perfectly to bare metal, providing a smooth, durable base for paint. The self-etching formula ensures excellent corrosion resistance and strong bonding. Easy to apply and dries quickly. The 15.5 oz can offers great coverage. Highly recommend for professional or DIY auto projects—consistent, reliable, and high-quality results every time! ### ⭐⭐⭐⭐⭐ Perfect Primer for Flawless Metal Paint Jobs *by T***S on 18 June 2025* This primer is absolutely fantastic! It creates a seamless base on bare metal, ensuring a smooth and long-lasting surface for painting. With its self-etching formula, it delivers outstanding corrosion resistance and excellent adhesion. Application is a breeze, and it dries in no time. The 15.5 oz can provides excellent coverage for various projects. I highly recommend it for both professional and DIY auto tasks—it delivers consistent, reliable, and top-notch results without fail! ### ⭐⭐⭐⭐⭐ Superior to Rust-Oleum *by I***N on 31 May 2026* This SEM brand is superior to the Rust-Oleum version of etching primers that Home Depot sells. The can has an impressive spray nozzle that delivers a uniform layer in a wide pattern - not chunky round splotches. I had a rusty project I was working on and had previously used up my SEM can, so I bought the best Home Depot offered. The Rust-Oleum is cheaper, but you get what you pay for. Buy the SEM, and you'll be highly satisfied with the results. ## 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.hr/products/265517976-39683-grey-self-etching-primer-15-5-oz](https://www.desertcart.hr/products/265517976-39683-grey-self-etching-primer-15-5-oz) --- *Product available on Desertcart Croatia* *Store origin: HR* *Last updated: 2026-08-05*