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    <loc>https://fortressinternational.ca/products/premium-polycarbonate-greenhouse-panels-uv-resistant-and-weather</loc>
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      <image:title>Smoke Tinted Bronze Polycarbonate Panels – UV-Resistant &amp; Insulated Greenhouse Sheets</image:title>
      <image:caption>Smoke tinted bronze polycarbonate panel for greenhouse roofing</image:caption>
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    <loc>https://fortressinternational.ca/products/4x20-ft-corrugated-polycarbonate-panel-custom-cut-available-50-off</loc>
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      <image:title>Corrugated Greenhouse Panel (Wavy Ribbed Sheets)</image:title>
      <image:caption>Corrugated greenhouse panel with wavy ribbed design</image:caption>
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    <loc>https://fortressinternational.ca/products/corrugated-polycarbonate-greenhouse-panel-1-5mm-thick-high-durability-uv-clear-4-x-12-4-x-20</loc>
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      <image:title>Corrugated Polycarbonate Greenhouse Panel – 1.5mm Thick (High-Durability UV Clear) – 4’ x 12’ &amp; 4’ x 20’</image:title>
      <image:caption>Clear corrugated polycarbonate panel for greenhouse roofs</image:caption>
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    <loc>https://fortressinternational.ca/products/triple-wall-clear-polycarbonate-greenhouse-panels-4mm-to-12mm-flat-sheets</loc>
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      <image:title>Triple Wall Clear Polycarbonate Greenhouse Panels – 4’x 10’ | 4mm to 8mm (Flat Sheets)</image:title>
      <image:caption>Triple wall clear polycarbonate greenhouse sheet – 4’x10’, 8mm thick</image:caption>
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  <url>
    <loc>https://fortressinternational.ca/products/triple-wall-clear-polycarbonate-sheet-4-x-8-4mm-6mm-light-diffusing-panels-for-greenhouses</loc>
    <lastmod>2026-05-01T00:20:30-07:00</lastmod>
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      <image:title>Clear Triple Wall Polycarbonate Sheets for Greenhouses – Multiple Sizes &amp; Thickness (4mm–12mm)</image:title>
      <image:caption>Clear triple wall polycarbonate sheet for greenhouse and roofing insulation</image:caption>
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    <loc>https://fortressinternational.ca/products/lexan-polycarbonate-sheet-4-x-10-solid-bulletproof-panel-3mm-5mm-thickness</loc>
    <lastmod>2026-05-01T00:20:30-07:00</lastmod>
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      <image:title>Lexan Polycarbonate Sheet – 4’ x 10’ | Solid Bulletproof Panel – 3mm &amp; 5mm Thickness</image:title>
      <image:caption>Lexan clear polycarbonate sheet with high impact resistance for glazing and safety barriers</image:caption>
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    <loc>https://fortressinternational.ca/products/lexan-polycarbonate-sheet-4-x-19-solid-bulletproof-urethane-4mm-thickness</loc>
    <lastmod>2026-05-01T00:20:30-07:00</lastmod>
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      <image:title>Lexan Polycarbonate Sheet – 4’ x 19’ | Solid Bulletproof Urethane – 4mm Thickness</image:title>
      <image:caption>Lexan solid polycarbonate sheet – clear bulletproof panel for industrial and greenhouse use</image:caption>
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    <loc>https://fortressinternational.ca/products/pre-assembled-greenhouse-kits-durable-ready-to-use-polycarbonate-greenhouses-multiple-sizes</loc>
    <lastmod>2026-05-01T00:20:30-07:00</lastmod>
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      <image:loc>https://cdn.shopify.com/s/files/1/0603/7186/1559/files/Large_Greenhouse_for_Commercial_or_Hobby_Use.jpg?v=1749047959</image:loc>
      <image:title>Pre-Assembled Greenhouse Kits – Durable, Ready-to-Use Polycarbonate Greenhouses (Multiple Sizes)</image:title>
      <image:caption>Large greenhouse suitable for commercial growing or serious hobbyists, with reinforced structure and ample planting space</image:caption>
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    <loc>https://fortressinternational.ca/products/20-ft-aluminum-h-connector</loc>
    <lastmod>2026-05-01T00:20:30-07:00</lastmod>
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      <image:loc>https://cdn.shopify.com/s/files/1/0603/7186/1559/files/H_connector_20_ft.jpg?v=1748919866</image:loc>
      <image:title>Aluminum H Connector for Polycarbonate Panels – 8ft, 10ft, 20ft Sizes</image:title>
      <image:caption>Close-up of aluminum H connector ends showing interlocking profile</image:caption>
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  <url>
    <loc>https://fortressinternational.ca/products/4-ft-clear-u-end-cap-for-polycarbonate-acrylic-panels</loc>
    <lastmod>2026-05-01T00:20:30-07:00</lastmod>
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      <image:title>4 ft Clear U End Cap for Polycarbonate &amp; Acrylic Panels</image:title>
      <image:caption>“4 ft clear U end cap for polycarbonate or acrylic sheet edge sealing”</image:caption>
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    <loc>https://fortressinternational.ca/products/4-ft-foam-closure-strip-for-corrugated-panels</loc>
    <lastmod>2026-05-01T00:20:30-07:00</lastmod>
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      <image:title>4 ft Foam Closure Strip for Corrugated Panels</image:title>
      <image:caption>Foam closure for polycarbonate or metal corrugated sheets</image:caption>
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  </url>
  <url>
    <loc>https://fortressinternational.ca/products/rubber-dome-washer-screw-for-polycarbonate-panels-0-30-each</loc>
    <lastmod>2026-05-01T00:20:30-07:00</lastmod>
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      <image:title>Rubber Dome Washer Screw for Polycarbonate Panels – $0.30 each</image:title>
      <image:caption>Single rubber washer screw for greenhouse or patio sheet installation</image:caption>
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  </url>
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    <loc>https://fortressinternational.ca/products/greenhouse-kit-2026-diy-to-fully-assembled-options-polycarbonate-panels</loc>
    <lastmod>2026-05-01T00:20:30-07:00</lastmod>
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      <image:title>Greenhouse Kit 2026 – DIY to Fully Assembled Options (Polycarbonate Panels)</image:title>
      <image:caption></image:caption>
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  </url>
  <url>
    <loc>https://fortressinternational.ca/products/pressure-treated-wooden-greenhouse-strapping-1-x2-x8ft-outdoor-weather-resistant-wood-support-lumber</loc>
    <lastmod>2026-05-01T00:20:30-07:00</lastmod>
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      <image:title>Pressure Treated Wooden Greenhouse Strapping 1”x2”x8ft – Outdoor Weather-Resistant Wood Support Lumber</image:title>
      <image:caption>Pressure treated wooden greenhouse strapping 1x2x8 ft outdoor lumber for framing and support</image:caption>
    </image:image>
  </url>
  <url>
    <loc>https://fortressinternational.ca/products/aluminum-dome-washer-1-25-3-16-hole-size-rust-resistant-fastener-washer</loc>
    <lastmod>2026-05-01T00:20:30-07:00</lastmod>
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      <image:loc>https://cdn.shopify.com/s/files/1/0603/7186/1559/files/aluminum-dome-washer-1-25-inch-3-16-hole.jpg?v=1777044700</image:loc>
      <image:title>Aluminum Dome Washer 1.25” – 3/16” Hole Size | Rust-Resistant Fastener Washer</image:title>
      <image:caption>Aluminum dome washer 1.25 inch with 3/16 hole for fasteners and construction use</image:caption>
    </image:image>
  </url>
  <url>
    <loc>https://fortressinternational.ca/products/commercial-grade-6-mil-greenhouse-poly-film-uv-resistant-anti-condensation-10-year-clear-greenhouse-plastic-made-in-canada</loc>
    <lastmod>2026-05-01T00:20:30-07:00</lastmod>
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      <image:loc>https://cdn.shopify.com/s/files/1/0603/7186/1559/files/6mil-greenhouse-poly-film-clear-uv-resistant.jpg?v=1777052857</image:loc>
      <image:title>Commercial Grade 6 Mil Greenhouse Poly Film – UV Resistant, Anti-Condensation, 10+ Year Clear Greenhouse Plastic (Made in Canada)</image:title>
      <image:caption>Commercial grade 6 mil greenhouse poly film clear UV resistant plastic covering</image:caption>
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