{"title":"Fillers \u0026 Additives","description":"\u003cdiv style=\"max-width: 900px; margin: 0 auto; text-align: center; line-height: 1.8; color: #1f1f1f;\"\u003e\n\n  \u003cp style=\"font-size: 13px; letter-spacing: 0.12em; text-transform: uppercase; color: #7a7a7a; margin-bottom: 10px;\"\u003e\n    Surfboard Materials\n  \u003c\/p\u003e\n\n  \u003cp style=\"font-size: 16px; max-width: 760px; margin: 0 auto 14px; color: #444;\"\u003e\n    \u003cstrong\u003ePrecision chemistry.\u003c\/strong\u003e Achieve the perfect consistency for fin box installs and ding repairs with professional-grade additives.\n  \u003c\/p\u003e\n\n  \u003cp style=\"font-size: 16px; max-width: 760px; margin: 0 auto 14px; color: #444;\"\u003e\n    Featuring \u003cstrong\u003eQ-cell, Cabosil, and Styrene Paraffin\u003c\/strong\u003e, these materials allow you to fine-tune your resin for maximum strength or lightweight filling.\n  \u003c\/p\u003e\n\n  \u003cp style=\"font-size: 14px; margin-top: 18px; color: #666; font-style: italic;\"\u003e\n    Shop-grade additives for custom resin work. Shipped nationwide.\n  \u003c\/p\u003e\n\n\u003c\/div\u003e","products":[{"product_id":"resin-research-additive-f","title":"Resin Research Additive F","description":"\u003cp\u003eAchieve a professional, factory-grade finish with \u003cstrong\u003eResin Research Additive F\u003c\/strong\u003e. This specialized solution is the ultimate troubleshoot for epoxy glassing, designed specifically to eliminate common surface issues and streamline your sanding process.\u003c\/p\u003e\n\n\u003cp\u003eAdditive F works by reducing the surface tension of the resin, which effectively \u003cstrong\u003eprevents air bubbles, eliminates amine blush, and stops \"fish-eyes\"\u003c\/strong\u003e (craters) from forming during application. Additionally, it acts as a surfacing agent, making the resin significantly easier to sand without clogging your paper.\u003c\/p\u003e\n\n\u003ch3\u003eSuggested Usage:\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eLamination:\u003c\/strong\u003e 1cc per ounce of Hardener.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eTop Coat (Hot-Coat):\u003c\/strong\u003e 2cc per ounce of Hardener.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eYield:\u003c\/strong\u003e A 4 oz. bottle is sufficient for an entire 3-gallon Resin Research kit.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eKey Benefits:\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eSurface Perfection:\u003c\/strong\u003e Eliminates fish-eyes and surface tension issues.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eImproved Sanding:\u003c\/strong\u003e Provides a cleaner, harder surface for faster sanding.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eBubble Release:\u003c\/strong\u003e Helps trapped air escape the lamination more easily.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eVersatile:\u003c\/strong\u003e Compatible with all Resin Research epoxy systems.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003e\u003cem\u003e\u003cstrong\u003ePro Tip:\u003c\/strong\u003e While not required, Additive F is a game-changer for clear-coated boards where surface perfection is vital. Note: Most builders skip this for small ding repairs, as it requires precise measurement to be effective.\u003c\/em\u003e\u003c\/p\u003e","brand":"Shapers Supply","offers":[{"title":"2oz","offer_id":52745850192171,"sku":null,"price":5.0,"currency_code":"USD","in_stock":true},{"title":"4oz","offer_id":52745850224939,"sku":null,"price":8.0,"currency_code":"USD","in_stock":true},{"title":"16oz (Pint)","offer_id":52745850257707,"sku":null,"price":28.0,"currency_code":"USD","in_stock":true},{"title":"32oz (Quart)","offer_id":52745850290475,"sku":null,"price":43.0,"currency_code":"USD","in_stock":true},{"title":"128oz (Gallon)","offer_id":52745850323243,"sku":null,"price":105.0,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0886\/6634\/1675\/files\/Resin-Research-Additive-F.webp?v=1775593008"},{"product_id":"mekp-catalyst-methyl-ethyl-ketone-peroxide","title":"MEKP Catalyst (Methyl Ethyl Ketone Peroxide)","description":"\u003cp\u003eGet a consistent, reliable kick every time with our \u003cstrong\u003eMEKP Catalyst\u003c\/strong\u003e. 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Catalyst\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eKey Features:\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eHigh Concentration:\u003c\/strong\u003e Industrial-grade peroxide for consistent curing.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eUniversal Compatibility:\u003c\/strong\u003e Works with Silmar, Reichhold, and all standard surfboard polyester resins.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003ePrecision Control:\u003c\/strong\u003e Allows you to manage your work time based on your local climate.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003e\u003cem\u003e\u003cstrong\u003eSafety Note:\u003c\/strong\u003e MEKP is a strong oxidizer. Always wear eye protection and gloves when handling. Avoid contact with skin and eyes, and store in a cool, dark place away from direct sunlight.\u003c\/em\u003e\u003c\/p\u003e","brand":"Shapers Supply","offers":[{"title":"1\/2oz","offer_id":52745923789099,"sku":null,"price":2.0,"currency_code":"USD","in_stock":true},{"title":"1oz","offer_id":52745923821867,"sku":null,"price":3.0,"currency_code":"USD","in_stock":true},{"title":"2oz","offer_id":52745923854635,"sku":null,"price":5.0,"currency_code":"USD","in_stock":false},{"title":"8oz","offer_id":52745923887403,"sku":null,"price":15.0,"currency_code":"USD","in_stock":false},{"title":"16oz","offer_id":52745923920171,"sku":null,"price":25.0,"currency_code":"USD","in_stock":false},{"title":"Gallon","offer_id":52745923952939,"sku":null,"price":49.0,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0886\/6634\/1675\/files\/MEKP_Catalyst.webp?v=1775593008"},{"product_id":"polyester-surfacing-agent-wax-solution","title":"Polyester Surfacing Agent (Wax Solution)","description":"\u003cp\u003eConvert your laminating resin into a hard-curing sanding resin with our \u003cstrong\u003ePolyester Surfacing Agent\u003c\/strong\u003e. This essential additive is a specialized paraffin wax dissolved in styrene, designed specifically for the \"hot-coat\" or final coat phase of your surfboard build.\u003c\/p\u003e\n\n\u003cp\u003eDuring the curing process, the wax in this solution will rise or \"bloom\" to the surface. This creates a critical barrier between the resin and the air, allowing the resin underneath to cure completely tack-free. Without this agent, the resin remains sticky, making it impossible to sand without gumming up your sandpaper.\u003c\/p\u003e\n\n\u003ch3\u003eUsage \u0026amp; Mixing:\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eStandard Ratio:\u003c\/strong\u003e Add 2 oz. of Surfacing Agent per 1 Gallon of Laminating Resin.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCompatibility:\u003c\/strong\u003e Works with all standard polyester resins, including Silmar and Reichhold.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eKey Features:\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eSandability:\u003c\/strong\u003e Eliminates surface tack for a clean, hard finish.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eProfessional Results:\u003c\/strong\u003e Ensures a smooth transition from lamination to the final finish.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eEasy to Use:\u003c\/strong\u003e Simply stir into your resin before adding your MEKP catalyst.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003e\u003cem\u003e\u003cstrong\u003ePro Tip:\u003c\/strong\u003e Always shake the bottle well before use, as the paraffin wax can settle over time. If your shop is very cold, you may need to warm the bottle slightly to ensure the wax is fully dissolved before mixing.\u003c\/em\u003e\u003c\/p\u003e","brand":"Shapers Supply","offers":[{"title":"2oz","offer_id":52745940697387,"sku":null,"price":8.0,"currency_code":"USD","in_stock":true},{"title":"4oz","offer_id":52745940730155,"sku":null,"price":11.0,"currency_code":"USD","in_stock":true},{"title":"8oz","offer_id":52745940762923,"sku":null,"price":16.0,"currency_code":"USD","in_stock":false},{"title":"Quart (32oz)","offer_id":52745940795691,"sku":null,"price":28.0,"currency_code":"USD","in_stock":false},{"title":"Gallon (128oz)","offer_id":52745940828459,"sku":null,"price":65.0,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0886\/6634\/1675\/files\/Surfacing_Agent.webp?v=1775593009"},{"product_id":"polyester-uv-catalyst-uv-powder","title":"Polyester UV Catalyst (UV Powder)","description":"\u003cp\u003eTake control of your cure time with our \u003cstrong\u003ePolyester UV Catalyst\u003c\/strong\u003e. This high-potency powder allows you to convert standard polyester resin into a UV-activated system, giving you the luxury of \"infinite work time\" until you're ready to set the resin in the sun.\u003c\/p\u003e\n\n\u003cp\u003eThis additive utilizes advanced \u003cstrong\u003ephoto-initiators\u003c\/strong\u003e that absorb UV energy from sunlight or specialized UV lamps. Once exposed, the powder triggers a rapid chemical reaction, converting your liquid resin into a solid, hard finish in a matter of minutes. It is the perfect solution for garage builders who want to pull perfect laps without the stress of a chemical kick.\u003c\/p\u003e\n\n\u003ch3\u003eMixing Instructions:\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eSuggested Ratio:\u003c\/strong\u003e 7 grams of UV Catalyst powder per 1 Gallon of resin.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCompatibility:\u003c\/strong\u003e Designed for use with all standard polyester laminating and sanding resins.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eKey Benefits:\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eInfinite Pot Life:\u003c\/strong\u003e Resin stays liquid indoors, allowing for stress-free laminations.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eInstant Cure:\u003c\/strong\u003e Hardens in 1–3 minutes when moved into direct sunlight.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCost Effective:\u003c\/strong\u003e A small amount of powder converts an entire gallon of standard resin.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003e\u003cem\u003e\u003cstrong\u003ePro Tip:\u003c\/strong\u003e For the best results, mix the powder into a small amount of resin first to create a \"concentrate\" and ensure there are no clumps, then stir that concentrate into your full gallon.\u003c\/em\u003e\u003c\/p\u003e","brand":"Shapers Supply","offers":[{"title":"7 Grams","offer_id":52746111320363,"sku":null,"price":5.0,"currency_code":"USD","in_stock":true},{"title":"35 Grams","offer_id":52746111353131,"sku":null,"price":19.0,"currency_code":"USD","in_stock":true},{"title":"385 Grams","offer_id":52746111385899,"sku":null,"price":95.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0886\/6634\/1675\/files\/UV_Additive.webp?v=1775593009"},{"product_id":"styrene-monomer-resin-thinner","title":"Styrene Monomer (Resin Thinner)","description":"\u003cp\u003e\u003cstrong\u003eStyrene Monomer\u003c\/strong\u003e is a versatile, multi-purpose additive and solvent essential for any professional glassing room. While primarily used as a resin thinner to lower viscosity, its unique chemical properties make it a go-to solution for a variety of technical surfboard building tasks.\u003c\/p\u003e\n\n\u003cp\u003eWhether you need faster fiberglass saturation on a complex layup or you are looking to create a \"cheater\" gloss coat with a thinner consistency, Styrene provides the control you need over your resin's flow.\u003c\/p\u003e\n\n\u003ch3\u003eCommon Applications:\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eResin Thinning:\u003c\/strong\u003e Lowers viscosity for faster cloth saturation and smoother gloss coats.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eUV Powder Solvent:\u003c\/strong\u003e Ideal for dissolving UV catalyst powders to ensure a clump-free mix.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCosmetic Fixes:\u003c\/strong\u003e Excellent for removing light surface scratches on finished boards.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eLamination Clarity:\u003c\/strong\u003e Helps reduce the \"ghosting\" effect around rice-paper logo laminates.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003e\u003cem\u003e\u003cstrong\u003ePro Tip:\u003c\/strong\u003e Use sparingly! Adding too much Styrene can weaken the final cured strength of the resin and may lead to yellowing over time. 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Proudly made in the USA, Q-Cel is the industry’s highest-quality brand of hollow glass microspheres, designed to thicken resin without adding significant weight to your surfboard.\u003c\/p\u003e\n\n\u003cp\u003eWhether you are working with \u003cstrong\u003ePolyester or Epoxy resins\u003c\/strong\u003e, Q-Cel is the filler of choice for structural ding repairs and filling voids in foam. When mixed at varying ratios, it transforms liquid resin into a creamy, white, lightweight paste that is exceptionally easy to sand once cured.\u003c\/p\u003e\n\n\u003ch3\u003eKey Features:\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eUltra-Lightweight:\u003c\/strong\u003e Thickens resin while maintaining the buoyancy of your board.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eUniversal Compatibility:\u003c\/strong\u003e 100% safe and effective for use with both Epoxy and Polyester resins.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eEasy Sanding:\u003c\/strong\u003e Formulated to sand smoothly without the brittleness of other fillers.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWhite Finish:\u003c\/strong\u003e Naturally blends with white surfboard foam for a cleaner looking repair.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003e\u003cem\u003e\u003cstrong\u003ePro Tip:\u003c\/strong\u003e For large foam fills, mix Q-Cel until you reach a \"peanut butter\" consistency. This ensures the putty stays in the hole and doesn't sag or run while curing.\u003c\/em\u003e\u003c\/p\u003e","brand":"Shapers Supply","offers":[{"title":"8oz","offer_id":52746173874475,"sku":null,"price":4.0,"currency_code":"USD","in_stock":true},{"title":"Quart","offer_id":52746173907243,"sku":null,"price":9.0,"currency_code":"USD","in_stock":true},{"title":"Gallon","offer_id":52746173940011,"sku":null,"price":21.0,"currency_code":"USD","in_stock":false},{"title":"60 LB Bag","offer_id":52746173972779,"sku":null,"price":285.0,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0886\/6634\/1675\/files\/Q-Cel_Filler.webp?v=1775593009"},{"product_id":"cab-o-sil-fumed-silica-thickener","title":"Cab-O-Sil Fumed Silica Thickener","description":"\u003cp\u003eFor high-strength repairs and structural bonding, \u003cstrong\u003eCab-O-Sil\u003c\/strong\u003e is the industry's highest-quality brand of fumed silica. Proudly made in the USA, this thickening agent is essential for shapers and glassers who require a resin paste with superior flex characteristics and durability.\u003c\/p\u003e\n\n\u003cp\u003eUnlike microspheres, Cab-O-Sil creates a \"thixotropic\" paste that is incredibly strong and resistant to cracking under stress. It is 100% compatible with both \u003cstrong\u003epolyester and epoxy resins\u003c\/strong\u003e. Because it cures translucent, it is the ideal base for custom color work; simply add pigments to achieve a perfect white or matched color effect for your repair.\u003c\/p\u003e\n\n\u003ch3\u003eKey Features:\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eHigh Flexural Strength:\u003c\/strong\u003e Offers superior flex and impact resistance compared to Q-Cel.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eUniversal Compatibility:\u003c\/strong\u003e Works seamlessly with all surfboard resin systems (Epoxy \u0026amp; Poly).\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eNon-Sag Formula:\u003c\/strong\u003e Excellent for vertical surfaces and rail repairs where you need the resin to stay put.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eTranslucent Base:\u003c\/strong\u003e Cures clear\/cloudy—perfect for mixing with pigments for color-matched repairs.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003e\u003cem\u003e\u003cstrong\u003ePro Tip:\u003c\/strong\u003e Cab-O-Sil is much harder to sand than Q-Cel. 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These are high-purity glass filaments finely cut into a dense glass powder, designed to be mixed with resin to create an incredibly strong, impact-resistant structural putty.\u003c\/p\u003e\n\n\u003cp\u003eMilled fibers are the industry standard for reinforcing high-stress areas on a surfboard. Because they consist of actual glass strands rather than hollow spheres, they provide significantly higher tensile strength and compression resistance than Q-Cel or Cab-O-Sil. This makes them the primary choice for \"poured\" applications where strength is non-negotiable.\u003c\/p\u003e\n\n\u003ch3\u003eCommon Applications:\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eFin Box Installation:\u003c\/strong\u003e Use as a structural \"grout\" around fin boxes to prevent cant-line failure and blowout.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eLeash Plug Reinforcement:\u003c\/strong\u003e Ideal for setting leash plugs to ensure they stay anchored under heavy tension.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eStructural Repairs:\u003c\/strong\u003e Perfect for rebuilding shattered rails or crushed foam where structural \"meat\" is needed.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eHigh-Impact Areas:\u003c\/strong\u003e Use anywhere on the board that requires extra density and strength.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003e\u003cem\u003e\u003cstrong\u003ePro Tip:\u003c\/strong\u003e Milled fiber paste is very heavy and difficult to sand. 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Once applied, it provides a superior surface for airbrushing and other detailed color applications, preventing the \"bleeding\" often associated with raw EPS foam.\u003c\/p\u003e\n\n\u003ch3\u003eApplication Instructions:\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMixing:\u003c\/strong\u003e Mix the Z-Seal concentrate with \u003cstrong\u003edistilled water\u003c\/strong\u003e until it reaches a toothpaste-like consistency. \u003cem\u003eNote: Distilled water is critical to prevent discoloration from mineral deposits.\u003c\/em\u003e\n\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eApplication:\u003c\/strong\u003e Use a squeegee to spread the paste evenly over the shaped blank.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eDrying:\u003c\/strong\u003e Allow to dry completely. 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