{"id":9871,"date":"2026-08-11T13:17:27","date_gmt":"2026-08-11T13:17:27","guid":{"rendered":"https:\/\/www.whitesand.sa\/?p=9871"},"modified":"2026-08-11T13:26:14","modified_gmt":"2026-08-11T13:26:14","slug":"faq-white-sand-rep-fr-400","status":"publish","type":"post","link":"https:\/\/www.whitesand.sa\/ar\/faq-white-sand-rep-fr-400\/","title":{"rendered":"FAQ: White Sand REP FR 400"},"content":{"rendered":"
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\r\n 1. What is WHITE SAND REP FR 400?\n<\/span>\r\n <\/div>\r\n
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WHITE SAND REP FR 400 is a high-strength, fiber-reinforced, polymer-modified, microsilica-enhanced cementitious structural repair mortar. It is a ready-to-use repair compound formulated for demanding structural concrete repairs with excellent adhesion, durability, and mechanical performance.<\/span><\/p> <\/div>\r\n <\/div>\r\n <\/div>\r\n

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\r\n 2. What is WHITE SAND REP FR 400 used for?\n<\/span>\r\n <\/div>\r\n
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WHITE SAND REP FR 400 is designed for:<\/span><\/p>

  • \u0625\u0635\u0644\u0627\u062d \u0627\u0644\u062e\u0631\u0633\u0627\u0646\u0629 \u0627\u0644\u0625\u0646\u0634\u0627\u0626\u064a\u0629.<\/span><\/li>
  • \u0625\u0635\u0644\u0627\u062d \u0627\u0644\u062e\u0631\u0633\u0627\u0646\u0629 \u0627\u0644\u0645\u0633\u0644\u062d\u0629 \u0627\u0644\u0645\u062a\u0636\u0631\u0631\u0629.<\/span><\/li>
  • \u0625\u0635\u0644\u0627\u062d \u062a\u0639\u0634\u064a\u0634 \u0627\u0644\u062e\u0631\u0633\u0627\u0646\u0629.<\/span><\/li>
  • \u0625\u0635\u0644\u0627\u062d \u0627\u0644\u0623\u0633\u0637\u062d \u0627\u0644\u062e\u0631\u0633\u0627\u0646\u064a\u0629 \u0627\u0644\u0631\u0623\u0633\u064a\u0629.<\/span><\/li>
  • \u0625\u0635\u0644\u0627\u062d \u0627\u0644\u0623\u0633\u0637\u062d \u0627\u0644\u062e\u0631\u0633\u0627\u0646\u064a\u0629 \u0627\u0644\u0623\u0641\u0642\u064a\u0629.<\/span><\/li>
  • \u0625\u0635\u0644\u0627\u062d \u0627\u0644\u0623\u0633\u0637\u062d \u0627\u0644\u062e\u0631\u0633\u0627\u0646\u064a\u0629 \u0627\u0644\u0639\u0644\u0648\u064a\u0629 (Overhead).<\/span><\/li>
  • \u0623\u0639\u0645\u0627\u0644 \u0627\u0644\u062a\u0631\u0645\u064a\u0645 \u0627\u0644\u0645\u0648\u0636\u0639\u064a (Patch Repairs).<\/span><\/li>
  • Rehabilitation of concrete structures<\/span><\/li><\/ul> <\/div>\r\n <\/div>\r\n <\/div>\r\n
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    \r\n 3. What types of concrete repairs can WHITE SAND REP FR 400 perform?\n<\/span>\r\n <\/div>\r\n
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    \u064a\u064f\u0646\u0627\u0633\u0628 \u063a\u0631\u0627\u0621 \u0648\u0627\u062c\u0647\u0627\u062a \u0648\u0627\u064a\u062a \u0633\u0627\u0646\u062f \u062a\u0631\u0643\u064a\u0628 \u0645\u062c\u0645\u0648\u0639\u0629 \u0648\u0627\u0633\u0639\u0629 \u0645\u0646 \u0623\u0646\u0648\u0627\u0639 \u0627\u0644\u0628\u0644\u0627\u0637\u060c \u0628\u0645\u0627 \u0641\u064a \u0630\u0644\u0643:<\/span><\/p>

    • Repairing broken structural concrete elements<\/span><\/li>
    • Repairing honeycombed concrete<\/span><\/li>
    • Repairing spalled concrete<\/span><\/li>
    • Restoring reinforced concrete<\/span><\/li>
    • Large patch repairs<\/span><\/li>
    • Structural restoration projects<\/span><\/li><\/ul> <\/div>\r\n <\/div>\r\n <\/div>\r\n
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      \r\n 4. What are the main advantages of WHITE SAND REP FR 400?\n<\/span>\r\n <\/div>\r\n
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      \u064a\u062a\u0645\u064a\u0632 \u063a\u0631\u0627\u0621 \u0648\u0627\u064a\u062a \u0633\u0627\u0646\u062f \u0628\u0631\u064a\u0645\u064a\u0648\u0645 \u0641\u064a\u0643\u0633 \u0628\u0627\u0644\u0639\u062f\u064a\u062f \u0645\u0646 \u0627\u0644\u0645\u0632\u0627\u064a\u0627\u060c \u0645\u0646\u0647\u0627:<\/span><\/p>

      • \u0645\u0642\u0627\u0648\u0645\u0629 \u0625\u0646\u0634\u0627\u0626\u064a\u0629 \u0639\u0627\u0644\u064a\u0629.<\/span><\/li>
      • \u062a\u0631\u0643\u064a\u0628\u0629 \u0645\u062f\u0639\u0645\u0629 \u0628\u0627\u0644\u0623\u0644\u064a\u0627\u0641.<\/span><\/li>
      • \u0645\u0639\u062f\u0644 \u0628\u0627\u0644\u0628\u0648\u0644\u064a\u0645\u0631\u0627\u062a.<\/span><\/li>
      • Microsilica enhancement<\/span><\/li>
      • \u062e\u0635\u0627\u0626\u0635 \u0639\u062f\u0645 \u0627\u0644\u0627\u0646\u0643\u0645\u0627\u0634<\/span><\/li>
      • \u0642\u0648\u0629 \u0627\u0644\u062a\u0635\u0627\u0642 \u0645\u0645\u062a\u0627\u0632\u0629.<\/span><\/li>
      • Extremely low permeability<\/span><\/li>
      • Corrosion protection for reinforcing steel<\/span><\/li>
      • Easy application on horizontal, vertical, and overhead surfaces<\/span><\/li>
      • \u0633\u0647\u0648\u0644\u0629 \u0639\u0627\u0644\u064a\u0629 \u0641\u064a \u0627\u0644\u062a\u0634\u063a\u064a\u0644 \u0648\u0627\u0644\u062a\u0637\u0628\u064a\u0642.<\/span><\/li><\/ul> <\/div>\r\n <\/div>\r\n <\/div>\r\n
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        \r\n 5. Can WHITE SAND REP FR 400 be used for vertical concrete repairs?\n<\/span>\r\n <\/div>\r\n
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        Yes. WHITE SAND REP FR 400 can be applied in a single layer up to <\/span>75 \u0645\u0645<\/b> thick on vertical surfaces thanks to its thixotropic, non-slump consistency.<\/span><\/p> <\/div>\r\n <\/div>\r\n <\/div>\r\n

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        \r\n 6. Is WHITE SAND REP FR 400 suitable for overhead repairs?\n<\/span>\r\n <\/div>\r\n
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        Yes. It can be applied overhead in layers up to <\/span>40 \u0645\u0645<\/b> thick while maintaining excellent adhesion and workability.<\/span><\/p> <\/div>\r\n <\/div>\r\n <\/div>\r\n

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        \r\n 7. Can WHITE SAND REP FR 400 be used for horizontal repairs?\n<\/span>\r\n <\/div>\r\n
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        Yes. The repair mortar can be applied up to <\/span>100 \u0645\u0645<\/b> thick in a single layer for horizontal concrete repairs and patch repairs.<\/span><\/p> <\/div>\r\n <\/div>\r\n <\/div>\r\n

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        \r\n 8. What is the compressive strength of WHITE SAND REP FR 400?\n<\/span>\r\n <\/div>\r\n
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        WHITE SAND REP FR 400 achieves:<\/span><\/p>

        • 30 \u0645\u064a\u062c\u0627\u0628\u0627\u0633\u0643\u0627\u0644 \u0623\u0648 \u0623\u0643\u062b\u0631 \u0628\u0639\u062f 7 \u0623\u064a\u0627\u0645.<\/b><\/li>
        • 45 MPa or greater after 28 days<\/b>
          <\/b> according to ASTM C109.<\/span><\/li><\/ul> <\/div>\r\n <\/div>\r\n <\/div>\r\n
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          \r\n 9. What is the tensile strength of WHITE SAND REP FR 400?\n<\/span>\r\n <\/div>\r\n
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          The repair mortar provides a tensile strength of <\/span>1.5 MPa or greater after 28 days<\/b> according to ASTM C307.<\/span><\/p> <\/div>\r\n <\/div>\r\n <\/div>\r\n

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          \r\n 10. What is the flexural strength of WHITE SAND REP FR 400?\n<\/span>\r\n <\/div>\r\n
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          Typical flexural strength values are:<\/span><\/p>

          • 4 MPa or greater after 7 days<\/b><\/li>
          • 6 MPa or greater after 28 days<\/b>
            <\/b> according to ASTM C348.<\/span><\/li><\/ul> <\/div>\r\n <\/div>\r\n <\/div>\r\n
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            \r\n 11. Why is WHITE SAND REP FR 400 suitable for structural concrete repair?\n<\/span>\r\n <\/div>\r\n
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            Its fiber reinforcement, polymer modification, microsilica enhancement, high compressive strength, excellent adhesion, non-shrink characteristics, and low permeability make it ideal for repairing reinforced concrete structures.<\/span><\/p> <\/div>\r\n <\/div>\r\n <\/div>\r\n

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            \r\n 12. How should the concrete surface be prepared before application?\n<\/span>\r\n <\/div>\r\n
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            \u0642\u0628\u0644 \u0627\u0644\u062a\u0637\u0628\u064a\u0642\u060c \u064a\u062c\u0628:<\/span><\/p>

            • Remove weak or damaged concrete.<\/span><\/li>
            • Cut back to sound concrete (minimum 10 mm depth).<\/span><\/li>
            • Remove dust, oil, grease, rust, and contaminants.<\/span><\/li>
            • \u062a\u0634\u0628\u064a\u0639 \u0627\u0644\u0623\u0633\u0637\u062d \u0627\u0644\u0645\u0627\u0635\u0629 \u0628\u0627\u0644\u0645\u0627\u0621 \u0627\u0644\u0646\u0638\u064a\u0641.<\/span><\/li>
            • Grit blast corroded reinforcing steel.<\/span><\/li>
            • Replace severely corroded reinforcement if required.<\/span><\/li>
            • \u0642\u0635 \u062d\u0648\u0627\u0641 \u0645\u0646\u0637\u0642\u0629 \u0627\u0644\u0625\u0635\u0644\u0627\u062d \u0628\u0645\u0646\u0634\u0627\u0631 \u0644\u0644\u062d\u0635\u0648\u0644 \u0639\u0644\u0649 \u062d\u0648\u0627\u0641 \u0645\u0646\u062a\u0638\u0645\u0629.<\/span><\/li>
            • Clean thoroughly using a brush or compressed air.<\/span><\/li><\/ul> <\/div>\r\n <\/div>\r\n <\/div>\r\n
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              \r\n 13. Is priming required before applying WHITE SAND REP FR 400?\n<\/span>\r\n <\/div>\r\n
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              Yes. Reinforcing steel should be treated with a corrosion inhibitor, and the concrete substrate should be primed using <\/span>WHITE SAND PRIME RC acrylic primer and bonding agent<\/b>. Apply the repair mortar while the primer remains tacky.<\/span><\/p> <\/div>\r\n <\/div>\r\n <\/div>\r\n

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              \r\n 14. How do you mix WHITE SAND REP FR 400?\n<\/span>\r\n <\/div>\r\n
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              Mix approximately <\/span>4 liters of clean water per 20 kg bag<\/b>. Slowly add the powder while mixing with a grout mixer or slow-speed drill fitted with a high-shear paddle. Mix for at least <\/span>3 minutes<\/b> until smooth and homogeneous. Do not prepare partial mixes.<\/span><\/p> <\/div>\r\n <\/div>\r\n <\/div>\r\n

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              \r\n 15. How is WHITE SAND REP FR 400 applied?\n<\/span>\r\n <\/div>\r\n
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              Apply the mortar by hand or steel trowel while pressing it firmly against the substrate and reinforcing steel to ensure complete compaction and adhesion. Finish with a wooden or plastic float before completing the final finish using a steel float.<\/span><\/p> <\/div>\r\n <\/div>\r\n <\/div>\r\n

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              \r\n 16. How should thick repairs be applied?\n<\/span>\r\n <\/div>\r\n
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              For thick vertical and overhead repairs, apply the mortar gradually in firmly pressed layers or patches to achieve optimum adhesion between the substrate and subsequent layers.<\/span><\/p> <\/div>\r\n <\/div>\r\n <\/div>\r\n

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              \r\n 17. How should WHITE SAND REP FR 400 be cured?\n<\/span>\r\n <\/div>\r\n
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              After application, cure the repair mortar by continuous water curing and covering it with polyethylene sheets, or use the <\/span>WHITE SAND Cure<\/b> curing compound to minimize moisture loss.<\/span><\/p> <\/div>\r\n <\/div>\r\n <\/div>\r\n

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              \r\n 18. Can WHITE SAND REP FR 400 help protect reinforcing steel?\n<\/span>\r\n <\/div>\r\n
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              Yes. Its extremely low permeability helps protect embedded reinforcing steel from corrosion by reducing the penetration of water and contaminants.<\/span><\/p> <\/div>\r\n <\/div>\r\n <\/div>\r\n

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              \r\n 19. What packaging is WHITE SAND REP FR 400 supplied in?<\/span>\r\n <\/div>\r\n
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              WHITE SAND REP FR 400 is supplied in <\/span>\u0623\u0643\u064a\u0627\u0633 20 \u0643\u062c\u0645<\/b>.<\/span><\/p> <\/div>\r\n <\/div>\r\n <\/div>\r\n

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              \r\n 20. What is the shelf life of WHITE SAND REP FR 400?\n<\/span>\r\n <\/div>\r\n
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              The product has a shelf life of <\/span>12 \u0634\u0647\u0631\u064b\u0627<\/b> when stored unopened in a dry, shaded location below <\/span>35\u00b0C<\/b> under proper warehouse conditions.<\/span><\/p> <\/div>\r\n <\/div>\r\n <\/div>\r\n

              \r\n
              \r\n 21. \u0643\u064a\u0641 \u064a\u062a\u0645 \u062a\u0646\u0638\u064a\u0641 \u0627\u0644\u0623\u062f\u0648\u0627\u062a \u0628\u0639\u062f \u0627\u0644\u062a\u0637\u0628\u064a\u0642\u061f\n<\/span>\r\n <\/div>\r\n
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              Clean tools and equipment immediately with clean water before the mortar hardens. Hardened material can only be removed mechanically.<\/span><\/p> <\/div>\r\n <\/div>\r\n <\/div>\r\n

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              \r\n 22. Is WHITE SAND REP FR 400 safe to use?\n<\/span>\r\n <\/div>\r\n
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              Yes. Wear protective gloves and safety goggles during handling and application. Avoid direct contact with skin and eyes. Wash exposed skin immediately with soap and water, rinse eyes thoroughly if exposed, and seek medical advice if irritation continues. The product is non-flammable and not classified as hazardous under current legislation.<\/span><\/p> <\/div>\r\n <\/div>\r\n <\/div>\r\n

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              \r\n 23. Can WHITE SAND REP FR 400 be used for reinforced concrete restoration?\n<\/span>\r\n <\/div>\r\n
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              Yes. WHITE SAND REP FR 400 is specifically designed for structural repair and restoration of reinforced concrete, providing excellent adhesion, durability, corrosion protection, and long-term structural performance.<\/span><\/p> <\/div>\r\n <\/div>\r\n <\/div>\r\n

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              \r\n 24. Why choose WHITE SAND REP FR 400 over conventional repair mortars?\n<\/span>\r\n <\/div>\r\n
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              WHITE SAND REP FR 400 delivers superior compressive strength, fiber reinforcement, microsilica enhancement, non-shrink performance, exceptional adhesion, low permeability, corrosion protection, easy application on vertical and overhead surfaces, and long-lasting durability, making it an excellent choice for professional structural concrete repair projects.<\/span><\/p> <\/div>\r\n <\/div>\r\n <\/div>\r\n <\/div>\r\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t <\/div>\r\n <\/div>\r\n \t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<\/div>","protected":false},"excerpt":{"rendered":"

              1. What is WHITE SAND REP FR 400? WHITE SAND REP FR 400 is a high-strength, fiber-reinforced, polymer-modified, microsilica-enhanced cementitious structural repair mortar. It is a ready-to-use repair compound formulated for demanding structural concrete repairs with excellent adhesion, durability, and mechanical performance. 2. What is WHITE SAND REP FR 400 used for? WHITE SAND REP […]<\/p>\n","protected":false},"author":1,"featured_media":8340,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[93],"tags":[],"class_list":["post-9871","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-faq"],"acf":[],"_links":{"self":[{"href":"https:\/\/www.whitesand.sa\/ar\/wp-json\/wp\/v2\/posts\/9871","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.whitesand.sa\/ar\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.whitesand.sa\/ar\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.whitesand.sa\/ar\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.whitesand.sa\/ar\/wp-json\/wp\/v2\/comments?post=9871"}],"version-history":[{"count":5,"href":"https:\/\/www.whitesand.sa\/ar\/wp-json\/wp\/v2\/posts\/9871\/revisions"}],"predecessor-version":[{"id":9876,"href":"https:\/\/www.whitesand.sa\/ar\/wp-json\/wp\/v2\/posts\/9871\/revisions\/9876"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.whitesand.sa\/ar\/wp-json\/wp\/v2\/media\/8340"}],"wp:attachment":[{"href":"https:\/\/www.whitesand.sa\/ar\/wp-json\/wp\/v2\/media?parent=9871"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.whitesand.sa\/ar\/wp-json\/wp\/v2\/categories?post=9871"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.whitesand.sa\/ar\/wp-json\/wp\/v2\/tags?post=9871"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}