Prepare plywood subflooring and old or new concrete floors for transformation with our Moisture Seal Epoxy Flooring Primer. This powerful vapor blocker helps prevent mold, mildew, and off-gassing while revitalizing dull, cracked surfaces. It creates a durable bond that resists delamination, promotes strong adhesion to subsequent coatings, and delivers long-lasting performance. Perfect for both epoxy flake and metallic floors, it penetrates deep into concrete and adheres tenaciously to our Flooring Epoxy Undercoat on plywood subfloors to enhance both appearance and durability. Suitable for workshops, garages, commercial spaces, covered carports, enclosed porches, basements, pole barns, and home gyms. Moisture Seal Epoxy Flooring Primer offers easy application and long-lasting results, making it the ideal choice for your DIY flooring projects. Say goodbye to your worn-out floors and hello to vibrant, resilient showroom-quality spaces. Key Features: Available in Clear, Gray, Black, and Tan. Easy 2:1 mix ratio by volume. 30-minute working time for stress-free application. 24-hour walk-on time. Cures in 3-7 days. Low-odor and zero-VOC–perfect for indoor use. Compatible with both epoxy flake and metallic floors. Coverage Per 1.5 Gallon Kit: 0.75-1 oz per sq ft = 192-256 sq ft Application: Concrete Slabs: Fill cracks and voids with Floor Patch Epoxy Gel. Grind concrete thoroughly. Blend 2 parts A to 1 part B by volume, mixing for 2-4 minutes. Pour mixed material in ribbons across the surface, spread with a squeegee. Use a 1/4'' to 3/8'' microfiber roller to back roll evenly. For flake floors, broadcast the epoxy flakes, scrape after 6-7 hours, and let cure for 24 hours before applying the Polyaspartic Flooring Top Coat. For metallic floors, allow the Moisture Seal Epoxy Flooring Primer to cure for 24 hours before applying the tinted Epoxy Flooring Midcoat. Plywood Subfloors: Clean the surface and fill cracks and voids in the plywood subfloor with Stone Coat Floor Patch Epoxy Gel. Sand smooth before undercoating. Apply two coats of Flooring Epoxy Undercoat with a 1/4'' - 3/8'' microfiber roller. Wait 3-4 hours after the second coat before adding Moisture Seal Epoxy Primer. Mix Moisture Seal Epoxy Flooring Primer (2 parts A to 1 part B) for 2-4 minutes. Pour in ribbons, spread with a squeegee, and back roll evenly. For flake floors, broadcast epoxy flakes, scrape after 6-7 hours, and let cure for 24 hours before applying Polyaspartic Flooring Top Coat. For metallic floors, skip Moisture Seal Epoxy Primer and apply tinted Epoxy Flooring Midcoat over the Flooring Epoxy Undercoat, and let cure for 24 hours before lightly sanding, cleaning, and applying Ultimate Top Coat or Polyaspartic Top Coat. Important Notice for Moisture Seal Epoxy Primer—Clear: When using our Clear Moisture Seal Epoxy Flooring Primer beneath Epoxy Flooring Midcoat to create a Metallic Marble floor, the clear Moisture Seal Epoxy Flooring Primer must be tinted white with our White Opaque PolyColor Liquid Epoxy Dye. If you want a different base color, first tint the primer white, then add additional PolyColor liquid dyes to achieve your desired shade and finish. Important Prep & Cleaning Notice: For best results, DO NOT use acetone to clean or prep your surface.We recommend using 91% isopropyl alcohol for: Surface preparation before pouring Cleaning between poured layers Using acetone may interfere with adhesion and final finish quality. Stick with 91% isopropyl alcohol for a clean, professional result. PRO TIPS! Epoxy spike shoes are a must-have to protect both your footwear and your hard work. They allow you to walk over your epoxy floor as you spread your Moisture Seal Primer and pour and blend tinted epoxy without disturbing the surface or damaging the beautiful flowing designs you’ve created. With spiked shoes, you can easily move around the project, working back into areas without worrying about dragging regular shoes through the epoxy. For enhanced durability and scratch resistance, finish metallic epoxy floors with Stone Coat Flooring Ultimate Top Coat in Textured Matte or Textured Gloss, or use Polyaspartic Flooring Top Coat mixed with our Non-Skid Flooring Additive for extra slip protection. For epoxy flake floors, always finish with Polyaspartic Flooring Top Coat mixed with the Non-Skid Flooring Additive. This final coat will protect your floor, make it safe, and keep it looking flawless for years. Important Notice: Temporary Change in Container Size for Part B Hardener Part B Hardener in our Moisture Seal Epoxy Primer Kits will now be shipped in 32 oz bottles until further notice. Rest assured, you are receiving the same high-performance material that you rely on—only the container size has been adjusted temporarily. This change does not affect the quality or performance of the product in each kit. Thank you for your understanding and patience. Please reach out to our team if you have any questions regarding this temporary adjustment.
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