--- product_id: 103791360 title: "40773 zinc Based Weld Thru Primer" brand: "sem" price: "MX$1679" currency: MXN in_stock: true reviews_count: 8 category: "Sem" url: https://www.desertcart.mx/products/103791360-40773-zinc-based-weld-thru-primer store_origin: MX region: Mexico --- # Low weld spatter formula Enhanced metal adhesion Zinc-based corrosion shield 40773 zinc Based Weld Thru Primer **Brand:** sem **Price:** MX$1679 **Availability:** βœ… In Stock ## Summary > πŸ› οΈ Weld Strong, Rust Long – The Primer Pros Trust! ## Quick Answers - **What is this?** 40773 zinc Based Weld Thru Primer by sem - **How much does it cost?** MX$1679 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.mx](https://www.desertcart.mx/products/103791360-40773-zinc-based-weld-thru-primer) ## 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 - β€’ **Pro-Grade Adhesion:** Bonds directly to bare metal, creating a durable barrier that prevents flaking and peeling. - β€’ **OEM Trusted Quality:** Recommended by manufacturers for reliable, long-term performance on critical metal joints. - β€’ **Ultimate Rust Defense:** Zinc-rich formula delivers industry-leading corrosion protection that outlasts the competition. - β€’ **Seamless Weld Compatibility:** Minimizes heat-affected zones and ensures smooth, low-spatter welding for flawless finishes. - β€’ **Spray & Protect Effortlessly:** Matte finish aerosol offers easy, even coverageβ€”perfect for both interior and exterior metal surfaces. ## Overview SEM 40773 Zinc Based Weld Thru Primer is a 12.8 oz aerosol zinc-rich primer designed for superior corrosion resistance and enhanced adhesion to bare metal. Engineered to minimize weld spatter and heat-affected zones, it ensures clean, durable welds compatible with MIG and STRSW welding. Trusted by OEMs and professionals alike, this matte finish primer prevents flaking and withstands cavity wax, making it the go-to solution for long-lasting metal protection. ## Description ZincWeld Weld-Through Primer Aerosol 12.8 oz Zinc-based formula for best-in-class corrosion protection. Enhanced adhesion to bare metal for added corrosion protection. No flaking or peeling . not affected by cavity wax. Minimizes the heat affected zone while welding. Low weld spatter formula. Smooth spraying and easy covering. Compatible with MIG and STRSW welding 40773 Review: Great product - Worked well for me. Review: Works great - I use the weld through primer when I gave body sheet metal that will be welded together with plug welds. It's just extra insurance against rust through of the new panels in years to come. Though I no longer work professionally, when I did, SEM products never let me down. Price wise, it's sort of middle of the road, but I don't trust using the less expensive brands that contain a smaller percentage of the rust proofing ingredients and have less electrical conductivity which makes getting a good weld more difficult. ## Features - Weld thru primer - Zinc-based formula for best-in-class corrosion protection - Enhanced adhesion to bare metal for added corrosion protection - OEM recommended ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B07KPN6PNT | | Age Range Description | Adult | | Best Sellers Rank | #113,363 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #92 in Primer Paint | | Brand | SEM | | Brand Name | SEM | | Color | gray | | Color Code | #808080 | | Container Type | Can | | Coverage | Corrosion protection between welded substrates | | Customer Reviews | 4.6 out of 5 stars 123 Reviews | | Dry Time In Hours | 24 | | Finish Type | Matte | | Full Cure Time | 24 hours | | Global Trade Identification Number | 04064678640773 | | Included Components | Spray | | Indoor Outdoor Usage | Outdoor | | Is Waterproof | False | | Item Form | Aerosol | | Item Volume | 44.93 cubic inches | | Item Weight | 16 ounces | | Manufacturer | SEM Products | | Model Number | SEM-40773 | | Paint Type | Primer | | Part Number | 40773 | | Size | 12.8 Ounce (Pack of 1) | | Special Feature | Corrosion Resistant, Low Spatter | | Special Features | Corrosion Resistant, Low Spatter | | Specific Uses For Product | Interior/Exterior | | Surface Recommendation | Metal | | UPC | 646786407734 | | Unit Count | 12.8 Ounce | | Water Resistance Level | Water Resistant | ## Product Details - **Brand:** SEM - **Color:** gray - **Finish Type:** Matte - **Item Volume:** 44.93 Cubic Inches - **Paint Type:** Primer - **Size:** 12.8 Ounce (Pack of 1) - **Special Feature:** Corrosion Resistant, Low Spatter - **Specific Uses For Product:** Interior/Exterior - **Surface Recommendation:** Metal - **Unit Count:** 12.8 Ounce ## Images ![40773 zinc Based Weld Thru Primer - Image 1](https://m.media-amazon.com/images/I/617m0hjps7L.jpg) ## Customer Reviews ### ⭐⭐⭐⭐⭐ Great product *by A***N on May 16, 2025* Worked well for me. ### ⭐⭐⭐⭐⭐ Works great *by R***V on July 27, 2024* I use the weld through primer when I gave body sheet metal that will be welded together with plug welds. It's just extra insurance against rust through of the new panels in years to come. Though I no longer work professionally, when I did, SEM products never let me down. Price wise, it's sort of middle of the road, but I don't trust using the less expensive brands that contain a smaller percentage of the rust proofing ingredients and have less electrical conductivity which makes getting a good weld more difficult. ### ⭐⭐⭐⭐⭐ It works *by M***S on February 24, 2025* Works great --- ## Why Shop on Desertcart? - πŸ›’ **Trusted by 1.3+ Million Shoppers** β€” Serving international shoppers since 2016 - 🌍 **Shop Globally** β€” Access 737+ million products across 21 categories - πŸ’° **No Hidden Fees** β€” All customs, duties, and taxes included in the price - πŸ”„ **15-Day Free Returns** β€” Hassle-free returns (30 days for PRO members) - πŸ”’ **Secure Payments** β€” Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** β€” Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.mx/products/103791360-40773-zinc-based-weld-thru-primer](https://www.desertcart.mx/products/103791360-40773-zinc-based-weld-thru-primer) --- *Product available on Desertcart Mexico* *Store origin: MX* *Last updated: 2026-09-08*