--- product_id: 11775534 title: "39673 Black Self Etching Primer - 15.5 oz." brand: "sem" price: "239 zł" currency: PLN in_stock: true reviews_count: 8 category: "Sem" url: https://www.desertcart.pl/products/11775534-39673-black-self-etching-primer-15-5-oz store_origin: PL region: Poland --- # Covers 40-50 sq ft per can Dries in just 30 minutes 15.5 oz large can for extended use 39673 Black Self Etching Primer - 15.5 oz. **Brand:** sem **Price:** 239 zł **Availability:** ✅ In Stock ## Summary > ⚡ Prime like a pro—get flawless adhesion and fast results every time! ## Quick Answers - **What is this?** 39673 Black Self Etching Primer - 15.5 oz. by sem - **How much does it cost?** 239 zł with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.pl](https://www.desertcart.pl/products/11775534-39673-black-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 - • **Fast-Dry Formula:** Ready for next coat in just half an hour—speed up your project - • **Generous Coverage:** Covers up to 50 sq ft, minimizing re-purchase frequency - • **Superior Adhesion Power:** Etches bare metal for unbeatable paint grip - • **Professional Grade Finish:** Trusted by automotive pros for consistent, smooth application - • **Stain Resistant & Durable:** Keeps surfaces pristine and prepped for flawless topcoats ## Overview SEM 39673 Black Self Etching Primer is a professional-grade, oil-based primer designed for superior adhesion on bare metal surfaces. Delivered in a generous 15.5 oz aerosol can, it covers up to 50 square feet and dries quickly within 30 minutes, enabling faster project turnaround. Its stain-resistant formula ensures a smooth, durable base coat favored by automotive and industrial professionals alike. ## Description Self Etching Primer is a first-step coating that provides excellent adhesion to bare substrates. Review: Finally, a good, easy to apply, self etching primer! - This primer is the easiest to use self etching primer I've found so far and it adheres as well or better than anything else I've used for painting bare aluminum. It has a fine spray that goes on far more evenly than most rattle can paints. The primer dries quickly (three thin coats five to ten minutes apart are recommended) and can have the color coats applied after only an hour or so. While the can doesn't specify any temperature range for applying the paint, I have used it in 65-80°F temperatures without any problems. Obviously, the paint will dry faster at higher temperatures. Lower is better since the primer has to be liquid to etch the surface. The can does not recommend applying color coats directly to this primer (SEM doesn't specifically say so but a conventional primer should be used over the self etching primer), which is consistent with other self etching primers I have used which recommend using a regular primer over the self etching primer before applying color coats. I found that Krylon's Dual, a combination of primer and color coat, will work well when applied directly to this self etching primer, which reduces the overall number of coats of paint needed (the Krylon dries very slowly, though, although coats can be applied around 30 minutes apart). As always, proper surface prep is needed. I wet sand the surface with 320 or 400 wet/dry (which one depends how smooth a surface I want), then, after rinsing the piece with hot water and letting it dry thoroughly, I wipe it down with an acetone saturated cloth to degrease the surface (denatured alcohol or lacquer thinner also work well). While degreasing the work and handling it afterword, I wear disposable nitrile gloves to protect my skin and keep skin oils off the surface of the work. The price may seem high compared to other rattle can paints but is actually competitive with other self etching primers when you consider this comes in 15.5 oz. cans instead of the usual 12 oz. cans. Review: Very high quality product - SEM black etching primer covers well and is automotive shop quality. Although not the cheapest it is the best brand I have found. Many body shops I know use SEM products because of the quality they can count on. I have used both the black and the green etching primers from SEM and both work excellent. They also cover much better than others I have tried with disappointment. ## Features - New ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B000PKZ3IY | | Age Range Description | Adult | | Best Sellers Rank | #88,118 in Automotive ( See Top 100 in Automotive ) #54 in Automotive Primers | | Brand Name | SEM | | Color | Black | | Color Code | #000000 | | Container Type | container | | Coverage | 40-50 square feet | | Customer Reviews | 4.6 4.6 out of 5 stars (521) | | Dry Time In Hours | 0.5 | | Finish Type | Primer | | Global Trade Identification Number | 00646786396731 | | Included Components | Aerosol | | Indoor Outdoor Usage | Indoor | | Is Waterproof | False | | Item Form | Liquid | | Item Volume | 65.66 Cubic Inches | | Item Weight | 1.3 Pounds | | Manufacturer | SEM | | Model Name | 39673 | | Model Number | 39673 | | Paint Type | Oil | | Part Number | 39673 | | Size | 15.5 Ounce (Pack of 1) | | Special Features | special_feature | | Specific Uses For Product | Automotive, Industrial | | Surface Recommendation | Metal | | UPC | 646786396731 | | Unit Count | 440 Grams | | Water Resistance Level | Water Repellent | ## Product Details - **Brand:** SEM - **Color:** Black - **Finish Type:** Primer - **Item Volume:** 65.66 Cubic Inches - **Paint Type:** Oil - **Size:** 15.5 Ounce (Pack of 1) - **Special Feature:** special_feature - **Specific Uses For Product:** Automotive, Industrial - **Surface Recommendation:** Metal - **Unit Count:** 440 Grams ## Images ![39673 Black Self Etching Primer - 15.5 oz. - Image 1](https://m.media-amazon.com/images/I/81wuMdZCoQL.jpg) ## Questions & Answers **Q: Is this compatible with a urethane basecoat and clearcoat?** A: Self etch primer is for bare metal. You should seal it first with a top coat of sealer primer before basecoat. I have put basecoat directly on it with no problems though. **Q: Will this stick to plastic ?** A: I would probably use SEM Flexible Primer Surfacer on plastic. **Q: Should this product be used on bumpers before spraying with SEM black trim paint?** A: I'm not an expert but I use this product on bare "not chrome" metal. If you're talking about a chrome bumper I'm just not sure if this product would actually "etch" it. That's an interesting question though. I think you should call SEM or Eastwood products and ask. Eastwood has a lot of products and experience with coating different materials. Check their website out. I'm interested to hear what worked for you so please let me know. **Q: why is the 2 pack more expensive than 2 single cans combined?** A: I bought 2 and 4 packs cheaper Just have to search ## Customer Reviews ### ⭐⭐⭐⭐⭐ Finally, a good, easy to apply, self etching primer! *by J***E on July 10, 2016* This primer is the easiest to use self etching primer I've found so far and it adheres as well or better than anything else I've used for painting bare aluminum. It has a fine spray that goes on far more evenly than most rattle can paints. The primer dries quickly (three thin coats five to ten minutes apart are recommended) and can have the color coats applied after only an hour or so. While the can doesn't specify any temperature range for applying the paint, I have used it in 65-80°F temperatures without any problems. Obviously, the paint will dry faster at higher temperatures. Lower is better since the primer has to be liquid to etch the surface. The can does not recommend applying color coats directly to this primer (SEM doesn't specifically say so but a conventional primer should be used over the self etching primer), which is consistent with other self etching primers I have used which recommend using a regular primer over the self etching primer before applying color coats. I found that Krylon's Dual, a combination of primer and color coat, will work well when applied directly to this self etching primer, which reduces the overall number of coats of paint needed (the Krylon dries very slowly, though, although coats can be applied around 30 minutes apart). As always, proper surface prep is needed. I wet sand the surface with 320 or 400 wet/dry (which one depends how smooth a surface I want), then, after rinsing the piece with hot water and letting it dry thoroughly, I wipe it down with an acetone saturated cloth to degrease the surface (denatured alcohol or lacquer thinner also work well). While degreasing the work and handling it afterword, I wear disposable nitrile gloves to protect my skin and keep skin oils off the surface of the work. The price may seem high compared to other rattle can paints but is actually competitive with other self etching primers when you consider this comes in 15.5 oz. cans instead of the usual 12 oz. cans. ### ⭐⭐⭐⭐⭐ Very high quality product *by S***S on December 29, 2023* SEM black etching primer covers well and is automotive shop quality. Although not the cheapest it is the best brand I have found. Many body shops I know use SEM products because of the quality they can count on. I have used both the black and the green etching primers from SEM and both work excellent. They also cover much better than others I have tried with disappointment. ### ⭐⭐⭐⭐⭐ Works great *by B***Y on June 7, 2024* Very happy with this product. ## Frequently Bought Together - SEM 39673 Black Self Etching Primer - 15.5 oz. - SEM 39683 Grey Self Etching Primer - 15.5 oz. - SEM 42003 Black High Build Primer - 16 oz. --- ## 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.pl/products/11775534-39673-black-self-etching-primer-15-5-oz](https://www.desertcart.pl/products/11775534-39673-black-self-etching-primer-15-5-oz) --- *Product available on Desertcart Poland* *Store origin: PL* *Last updated: 2026-05-23*