--- product_id: 44092207 title: "Underdog Antifouling Bottom Paint - Red Gallon" brand: "totalboat" price: "$520.58" currency: USD in_stock: true category: "Total Boat" url: https://www.desertcart.us/products/44092207-underdog-antifouling-bottom-paint-red-gallon store_origin: US region: United States of America --- # 1.5 hr fast dry time 23.7% copper biocide power 500 sq.ft. coverage per gallon Underdog Antifouling Bottom Paint - Red Gallon **Brand:** totalboat **Price:** $520.58 **Availability:** ✅ In Stock ## Summary > 🛥️ Stay ahead of the tide with TotalBoat Underdog – antifouling that works as hard as you do! ## Quick Answers - **What is this?** Underdog Antifouling Bottom Paint - Red Gallon by totalboat - **How much does it cost?** $520.58 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.us](https://www.desertcart.us/products/44092207-underdog-antifouling-bottom-paint-red-gallon) ## Best For - totalboat enthusiasts ## Why This Product - Trusted totalboat brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Relentless Hull Defense:** Fights barnacles, slime, algae & weeds with 23.7% copper biocide for unbeatable antifouling protection. - • **Versatile Compatibility:** Works on fiberglass, wood, steel hulls and over most existing bottom paints—just prime bare surfaces first. - • **DIY-Friendly Application:** Roll, brush, or spray with ease; dries fast in 1.5 hours so you’re back on the water sooner. - • **Effortless Seasonal Prep:** No max dry time means paint ahead and launch on your schedule—perfect for trailered or beached boats. - • **Smooth Sailing Ablative Tech:** Paint gradually wears away to expose fresh biocide, reducing buildup and simplifying next season’s prep. ## Overview TotalBoat Underdog Antifouling Bottom Paint is a durable, ablative coating with 23.7% copper biocide designed for trailered, hauled, or beached boats. It protects fiberglass, wood, and steel hulls from barnacles, algae, and other fouling organisms while allowing flexible launch timing with no maximum dry time. Covering up to 500 sq. ft. per gallon and drying in as little as 1.5 hours, it’s easy to apply by DIYers or pros and compatible with most existing bottom paints when properly primed. ## Description TotalBoat Underdog Ablative Bottom Paint is ideal for trailered, beached, and seasonal boats that spend time out of the water between use. 24% cuprous oxide biocide protects fiberglass, wood, iron, and steel hulls in low-to-moderate fouling conditions by preventing the growth of barnacles, slime, weeds, algae, zebra mussels, and other fouling organisms. This durable ablative coating gradually wears away as your boat moves through the water, continuously exposing fresh biocide while reducing paint build-up for easier prep next season. Underdog's durable finish withstands trailering, beaching, and repeated launching better than traditional ablative paints. Apply Underdog with a chip brush, 3/16" nap roller, or spray equipment over properly prepared surfaces, including over most existing hard and ablative bottom paints in good condition. Do not use on aluminum or over thin-film freshwater paints. Prime bare surfaces with TotalProtect Epoxy Barrier Coat for maximum adhesion and to help protect against fiberglass blistering and metal corrosion. Apply in temperatures between 40-90°F with humidity below 90%. Most boats need 2 coats, with an extra coat recommended on high-wear areas such as skegs and leading keel edges. Thin up to 10% with Brushing Thinner 100 or Spray Thinner 101. Launch 6-16 hours after the final coat, depending on temperature, with no maximum launch window. Haul and relaunch without repainting—simply scuff sand to reactivate the coating. Available in Black, Blue, and Red in Gallon sizes. Covers up to 500 sq. ft. per gallon. Store in a cool, dry, well-ventilated area and protect from freezing. For below-the-waterline antifouling use only. Not intended for aluminum hulls, household projects, or marine topside applications. Compare to Rust-Oleum, Interlux Fiberglass Bottomkote NT, Flexdel Ultraguard, Pettit Unepoxy HRT, and Sea Hawk Sharkskin. ## Features - Economical Antifouling Paint ideal for boats that are trailered, hauled, or beached often, TotalBoat Underdog contains 23.7% copper biocide to fight barnacles, slime, algae, and weeds. Use below the waterline on fiberglass, wood, and steel hulls - Durable Ablative Bottom Paint for sailboats, power boats, fishing and work boats. Paint gradually wears away as your boat moves through the water, continuously exposing fresh biocide while reducing paint build-up for next season - Flexible Launch Timing: No maximum dry time lets you prep and paint ahead of the season and launch when you're ready. Perfect for boats that are hauled and relaunched during the season, as the biocide remains active without losing its effectiveness - Easy to Apply by DIY Boaters & Professional Painters: Use a 3/16" nap or foam roller, chip brush, or airless/conventional sprayer. Thin up to 10% with Brushing Thinner 100 or Spray Thinner 101. Apply 2 thin coats; dries in as little as 1.5 hours. - Compatible with Most Existing Bottom Paints: Apply over previously painted hulls or prime bare surfaces first with TotalProtect Epoxy Barrier Coat. Available in Black, Blue, and Red in Gallons. Covers up to 500 sq. ft. per gallon. Not for use on aluminum. ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B00HS5EFO2 | | Age Range Description | Adult | | Best Sellers Rank | #38,651 in Sports & Outdoors ( See Top 100 in Sports & Outdoors ) #94 in Boat Hardware | | Brand | TotalBoat | | Brand Name | TotalBoat | | Color | Red | | Container Type | Can | | Coverage | 500 | | Customer Reviews | 3.6 out of 5 stars 606 Reviews | | Dry Time In Hours | 1.5 | | Global Trade Identification Number | 00811932020369 | | Included Components | Paint | | Item Volume | 1 gallons | | Manufacturer | TotalBoat | | Model Number | 365430 | | Part Number | 365430 | | Size | 128 Fl Oz (Pack of 1) | | UPC | 811932020369 | | Unit Count | 128 Fluid Ounces | ## Product Details - **Brand:** TotalBoat - **Color:** Red - **Finish Type:** Flat - **Indoor/Outdoor Usage:** Outdoor - **Item Form:** Liquid - **Item Volume:** 1 Gallons - **Paint Type:** solvent-based - **Size:** 128 Fl Oz (Pack of 1) - **Surface Recommendation:** Fiberglass, Wood, Steel, Iron - **Unit Count:** 128.0 Fluid Ounces ## Images ![Underdog Antifouling Bottom Paint - Red Gallon - Image 1](https://m.media-amazon.com/images/I/710Y0P9lcgL.jpg) ## Available Options This product comes in different **Color, Size** options. ## Frequently Bought Together - TotalBoat Underdog Marine Antifouling Bottom Paint for Fiberglass, Wood and Steel Boats (Red, Gallon) - TotalBoat Wet Edge Marine Topside Paint for Boats, Fiberglass, and Wood (White), 1 Gallon (Pack of 1)(Packaging May vary) - TotalBoat Special Brushing Thinner 100 (Quart) --- ## 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.us/products/44092207-underdog-antifouling-bottom-paint-red-gallon](https://www.desertcart.us/products/44092207-underdog-antifouling-bottom-paint-red-gallon) --- *Product available on Desertcart United States of America* *Store origin: US* *Last updated: 2026-09-27*