{"product_id":"infinity-bond-polyfill-4000-marine-putty","title":"Infinity Bond POLYFILL 4000 Ultra Lightweight Polyester Marine Putty","description":"\u003ch2\u003eUltra Lightweight Polyester Putty for Hardtops \u0026amp; Sandwich Bonding\u003c\/h2\u003e\n\u003cp\u003eInfinity Bond POLYFILL 4000 is an \u003cstrong\u003eultra lightweight polyester marine putty\u003c\/strong\u003e engineered for hardtop bonding, sandwich bonding, and lightweight composite assembly applications where reducing overall part weight is critical. Weighing \u003cstrong\u003eless than 5 pounds per gallon\u003c\/strong\u003e, this advanced marine putty delivers dependable bonding performance while helping improve handling, efficiency, and structural stability in lightweight fiberglass assemblies. Designed for boat builders, marine fabricators, and composite manufacturers, POLYFILL 4000 pumps and trowels easily for reliable marine assembly and production performance.\u003c\/p\u003e\u003ch3\u003eLightweight Bonding Advantages of POLYFILL 4000 Marine Putty\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eUltra Lightweight Formula:\u003c\/strong\u003e Weighs less than 5 lbs per gallon to help reduce overall part and hardtop weight.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDesigned for Hardtops \u0026amp; Sandwich Bonding:\u003c\/strong\u003e Ideal for lightweight composite assemblies and bonded marine structures.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eExcellent Clamping Flow:\u003c\/strong\u003e Flows evenly under moderate clamping pressure for consistent bond line coverage.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eEasy Pumping \u0026amp; Troweling:\u003c\/strong\u003e Pumps smoothly and spreads easily for efficient marine production workflows.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eReliable Vertical Stability:\u003c\/strong\u003e Stays in place during assembly and mold repositioning without excessive movement.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLow Exotherm Performance:\u003c\/strong\u003e Helps reduce heat buildup during curing for improved cosmetic quality and reduced surface defects.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHigher Viscosity Options Available:\u003c\/strong\u003e Offered in thicker formulations for damming and specialized bonding applications.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eTechnical Specifications\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003eSeries: POLYFILL 4000\u003c\/li\u003e\n  \u003cli\u003eType: Marine Putty\u003c\/li\u003e\n  \u003cli\u003eChemistry: Polyester Liquid Adhesive\u003c\/li\u003e\n  \u003cli\u003eGel Time: 28 Minutes\u003c\/li\u003e\n  \u003cli\u003eReaction Time: 45 Minutes\u003c\/li\u003e\n  \u003cli\u003eFixture Time: 73 Minutes\u003c\/li\u003e\n  \u003cli\u003eViscosity:\u003c\/li\u003e\n\u003cul\u003e\n  \u003cli\u003e50,000 - 65,000 cps @ 2 RPM\u003c\/li\u003e\n  \u003cli\u003e18,000 - 28,000 cps @ 20 RPM\u003c\/li\u003e\n\u003c\/ul\u003e\n  \u003cli\u003ePeak Exotherm: 150°F (65.6°C)\u003c\/li\u003e\n  \u003cli\u003eColor: White\u003c\/li\u003e\n  \u003cli\u003eOdor: Styrene\u003c\/li\u003e\n  \u003cli\u003eTexture: Smooth\u003c\/li\u003e\n  \u003cli\u003eWeight: 4.6 lbs\/gallon\u003c\/li\u003e\n  \u003cli\u003eTensile Elongation: 8.2%\u003c\/li\u003e\n  \u003cli\u003eTensile Strength: 1,060 psi\u003c\/li\u003e\n  \u003cli\u003eFlexural Strength: 6,960 psi\u003c\/li\u003e\n  \u003cli\u003eFlexural Modulus: 357,000 psi\u003c\/li\u003e\n  \u003cli\u003eCompressive Strength: 1,910 psi\u003c\/li\u003e\n  \u003cli\u003eLap Shear: 1,100 psi\u003c\/li\u003e\n  \u003cli\u003eHeat Deflection: 150°F (65.6°C)\u003c\/li\u003e\n  \u003cli\u003eShore D Hardness: 40 - 50\u003c\/li\u003e\n  \u003cli\u003ePackage Size: 5-Gallon Pails\u003c\/li\u003e\n  \u003cli\u003eShelf Life: 3 Months\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eNote:\u003c\/strong\u003e Typical physical properties @ 75°F (24°C).\u003c\/p\u003e\n\u003ch3\u003eRecommended Applications\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003eBoat hardtop bonding applications\u003c\/li\u003e\n  \u003cli\u003eLightweight sandwich bonding\u003c\/li\u003e\n  \u003cli\u003eSmall composite part assembly\u003c\/li\u003e\n  \u003cli\u003eHand-laid fiberglass part production\u003c\/li\u003e\n  \u003cli\u003eMarine assemblies requiring weight reduction\u003c\/li\u003e\n  \u003cli\u003eLightweight structural bonding applications\u003c\/li\u003e\n  \u003cli\u003eDamming and controlled flow bonding applications\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Infinity Bond","offers":[{"title":"5 Gallon Pail","offer_id":43970354741382,"sku":"INF POLYFILL 4000 PL","price":0.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0003\/6903\/3269\/files\/infinity-bond-polyfill-4000-marine-polyester-putty-5-gallon-pail.jpg?v=1778516212","url":"https:\/\/www.infinitybond.com\/products\/infinity-bond-polyfill-4000-marine-putty","provider":"Infinity Bond Adhesives","version":"1.0","type":"link"}