{"product_id":"20-lb-3-4-in-fiberglass-for-concrete-mortar-mix-reinforcement","title":"20 Lb 3\/4 in Fiberglass for Concrete Mortar Mix - Reinforcement","description":"\u003cp\u003eOur review of the 20 Lb 3\/4 in fiberglass for concrete mortar mix finds it most useful for DIYers and small contractors who need an affordable, easy-to-add reinforcement to reduce cracking and seepage in cement work. The bottom line: this two-piece 10 lb pack delivers a simple way to increase mortar toughness and permeability resistance, especially in wet areas like basements, ponds, and exterior walls. It is not a substitute for structural rebar, but as a fiber additive it strengthens impact resistance and helps inhibit small crack formation when mixed properly.\u003c\/p\u003e\n\n\u003ch2\u003eKey Features\u003c\/h2\u003e\n\u003cul\u003e\n \u003cli\u003e\n\u003cstrong\u003ePackage Includes:\u003c\/strong\u003e Two 10 lb bags provide a total of 20 lb of white fiberglass, enough for multiple small repair or finishing jobs around the home.\u003c\/li\u003e\n \u003cli\u003e\n\u003cstrong\u003eFiber Size:\u003c\/strong\u003e At 0.75 in length the fibers distribute irregularly through mortar to enhance toughness without dramatically changing mix workability.\u003c\/li\u003e\n \u003cli\u003e\n\u003cstrong\u003eAnti Leakage:\u003c\/strong\u003e The fibers increase cement density and help reduce penetration and seepage in wet or damp areas when mixed evenly.\u003c\/li\u003e\n \u003cli\u003e\n\u003cstrong\u003eImpact Resistance:\u003c\/strong\u003e High strength filaments form a dense network inside the cured cement to help resist impact and minor seismic forces for non-structural elements.\u003c\/li\u003e\n \u003cli\u003e\n\u003cstrong\u003eEasy to Use:\u003c\/strong\u003e The fibers are added to sand and cement before water; expect to stir 30-60 seconds longer than normal to fully disperse the fibers.\u003c\/li\u003e\n \u003cli\u003e\n\u003cstrong\u003eWide Application:\u003c\/strong\u003e Suitable for basements, gardens, exterior walls, courtyards and other locations where improved crack resistance and impermeability are desired.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eWho It's For\u003c\/h2\u003e\n\u003cp\u003eThis product is aimed at homeowners, landscapers and small-scale masons who perform repair work, overlays or new non-structural concrete pours and want a simple additive to improve toughness and reduce hairline cracking. It fits projects such as garden slabs, floor patches, exterior wall rendering and pond repairs where improved impermeability matters.\u003c\/p\u003e\n\u003cp\u003eIt is not intended for primary structural reinforcement on load-bearing beams or columns; engineers and contractors should use engineered reinforcement like rebar or mesh where structural ratings are required. Professional projects requiring certified lab-tested admixtures might look elsewhere.\u003c\/p\u003e\n\n\u003ch2\u003ePros \u0026amp; Cons\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003ePros\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n \u003cli\u003eIncreases mortar toughness and helps inhibit small crack formation when dispersed evenly.\u003c\/li\u003e\n \u003cli\u003eImproves impermeability and reduces penetration in wet applications such as basements and ponds.\u003c\/li\u003e\n \u003cli\u003eHigh strength filaments interlock to enhance impact resistance for non-structural concrete works.\u003c\/li\u003e\n \u003cli\u003eConvenient two-piece packaging gives 20 lb total for multiple small jobs.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eCons\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n \u003cli\u003eRequires longer stirring time (30-60 seconds extra) and may affect workability if overdosed.\u003c\/li\u003e\n \u003cli\u003eNot a replacement for structural reinforcement like rebar for load-bearing elements.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eSpecifications\u003c\/h2\u003e\n\u003ctable\u003e\n \u003ctr\u003e\n\u003ctd\u003eBrand\u003c\/td\u003e\n\u003ctd\u003eMarsui\u003c\/td\u003e\n\u003c\/tr\u003e\n \u003ctr\u003e\n\u003ctd\u003ePackage Weight\u003c\/td\u003e\n\u003ctd\u003e20 lb (two 10 lb pieces)\u003c\/td\u003e\n\u003c\/tr\u003e\n \u003ctr\u003e\n\u003ctd\u003eFiber Length\u003c\/td\u003e\n\u003ctd\u003e0.75 in (3\/4 in)\u003c\/td\u003e\n\u003c\/tr\u003e\n \u003ctr\u003e\n\u003ctd\u003eColor\u003c\/td\u003e\n\u003ctd\u003eWhite\u003c\/td\u003e\n\u003c\/tr\u003e\n \u003ctr\u003e\n\u003ctd\u003ePrimary Use\u003c\/td\u003e\n\u003ctd\u003eReinforcement for concrete, cement and mortar\u003c\/td\u003e\n\u003c\/tr\u003e\n \u003ctr\u003e\n\u003ctd\u003eKey Benefits\u003c\/td\u003e\n\u003ctd\u003eAnti seepage, anti cracking, impact resistance\u003c\/td\u003e\n\u003c\/tr\u003e\n \u003ctr\u003e\n\u003ctd\u003eTypical Applications\u003c\/td\u003e\n\u003ctd\u003eBasements, ponds, exterior walls, garden floors, courtyards\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\n\n\u003ch2\u003eOur Verdict\u003c\/h2\u003e\n\u003cp\u003eThe 20 lb 3\/4 in fiberglass for concrete is a practical, cost-effective additive for non-structural concrete and mortar work where reduced cracking and improved impermeability are priorities. For homeowners and small contractors it offers clear benefits in wet areas and repair jobs, but it should be used as a complement to, not a replacement for, engineered structural reinforcement.\u003c\/p\u003e\n\n\u003ch2\u003eFrequently Asked Questions\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eHow is the fiber added to a mix?\u003c\/strong\u003e\u003cbr\u003eMix sand, cement and the fiberglass evenly before adding water, then stir 30-60 seconds longer than usual to disperse fibers.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eCan this replace rebar?\u003c\/strong\u003e\u003cbr\u003eNo, these fibers improve toughness and crack resistance but are not a substitute for structural rebar or mesh in load-bearing elements.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhere is it best applied?\u003c\/strong\u003e\u003cbr\u003eIt is best for wet or damp areas and non-structural surfaces such as basements, ponds, exterior walls, garden floors and courtyards.\u003c\/p\u003e","brand":"Marsui","offers":[{"title":"Default Title","offer_id":48196192469211,"sku":"B0C1GPJ3CW","price":74.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0724\/1043\/1707\/files\/71x-DsU_ymL._SL1500.jpg?v=1770290728","url":"https:\/\/gearmusthave.com\/products\/20-lb-3-4-in-fiberglass-for-concrete-mortar-mix-reinforcement","provider":"GearMustHave","version":"1.0","type":"link"}