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Top 8September 2025

Best Fiberglass Putty Filler

We made a list of the top 8 Fiberglass Putty Filler based on verified reviews, popularity and other factors which we summarized for you in this list.

Best Choice

J-B Weld Quart - Fiberglass Short-Strained Filler

J-B Weld Quart - Fiberglass Short-Strained Filler

✓J-B Weld Fiberglass Putty is a fiberglass-reinforced, two-component putty system that provides waterproof, durable repairs to cracks up to ½ inch on fiberglass, composites, metal, and concrete.
✓Provides short-strand reinforced repairs on fiberglass, composites, metal & concrete
✓2x the strength of body filler
✓Dries in 30 minutes
✓Easy to sand, paintable & waterproof

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Duraglas Fiberglass Filled Filler 1 Gallon

Duraglas Fiberglass Filled Filler 1 Gallon

U.S. Chemical & Plastics

✓Made with short strand fiberglass fibers|Metal and fiberglass repair|Use on rust repairs along with cracks and holes in fiber glass|Finishing Putty

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7% Discount

TotalBoat Polyester Structural Repair Putty - Marine Grade Long Strand Fiber Fiberglass Reinforced Filler for Boat and Automotive Repair (Quart Kit)

TotalBoat Polyester Structural Repair Putty - Marine Grade Long Strand Fiber Fiberglass Reinforced Filler for Boat and Automotive Repair (Quart Kit)

✓PRE-THICKENED FIBER REINFORCED POLYESTER PUTTY for high-strength structural filling, fitting, bonding, bedding & radius forming; great for boat building & repair on fiberglass, wood, metal, polyester laminates & core materials; use above or below waterline
✓MARINE FILLER has premium polyester resin and long strand glass fibers for strength, impact resistance & elasticity; ideal for bonding decks, stringers & liners to hulls; filleting and bonding bulkheads, and filling screw holes, bolt holes, chips & dents
✓EASY TO MIX, EASY TO APPLY: For a 100g mass, catalyze with 1% MEKP to get 15-20 min. of working time at 70°F (14 drops of MEKP per ounce of putty); adjust amount of catalyst to control working time; paste-like consistency is easy to spread and won’t sag
✓FAST-SETTING STRUCTURAL ADHESIVE is ideal for fiberglass & gelcoat repair; for cosmetic fairing, overcoat Polyester Structural Repair Putty with TotalBoat Polyester Fairing Compound; it sands smooth easily & can be finished with TotalBoat Gelcoat with wax
✓AVAILABLE IN QUART AND GALLON KITS: Includes 2 oz. MEKP. This versatile bonding compound can bond dissimilar materials and can also be used in many home, auto, construction, and aerospace applications, with no shrinking or cracking, even in bulk fillings

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3M Bondo Short Strand Fiberglass Reinforced Filler 1.37 LB (621 g) with Bondo Cream Hardener 0.5 oz (14g), Repair Holes Up To 0.5 IN, Waterproof (SS-PT-ES)

3M Bondo Short Strand Fiberglass Reinforced Filler 1.37 LB (621 g) with Bondo Cream Hardener 0.5 oz (14g), Repair Holes Up To 0.5 IN, Waterproof (SS-PT-ES)

✓Fiberglass strands and fibers make it twice as strong as regular body filler
✓Covers small (up to ½”) holes without the need for backing strips, fiberglass resin or cloth
✓Excellent as a foundation for hole, dent and rust-out repair
✓Can be paired with body filler and glaze for complete repairs
✓Sandable in as little as 20 minutes for quick repairs
✓Compatible with most paints
✓For industrial/occupational use only. Not for consumer sale or use.

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Evercoat Body Shop 105035 Pro-Grade Glazing Putty for Filling Minor Dings, Scratches and Low Spots in Aluminum, Fiberglass & More, Easy Mix Hardener Included 13 Fl Oz.

Evercoat Body Shop 105035 Pro-Grade Glazing Putty for Filling Minor Dings, Scratches and Low Spots in Aluminum, Fiberglass & More, Easy Mix Hardener Included 13 Fl Oz.

EVERCOAT Body Shop

✓Versatile Application: Ideal for minor imperfections like door dings, hail damage, pinholes, and grind marks on various surfaces including aluminum, steel, fiberglass, and more—ensuring a smooth, professional finish on any project.
✓Faster Sanding: Sands up to 50% faster than other glazing putties, saving you time on your repairs while achieving a flawless, smooth surface that’s ready for priming and painting.
✓Stain-Resistant: Designed to resist staining, ensuring your final finish remains pristine and clean, providing a high-quality, professional look without the worry of discoloration during application.
✓Complete Tack-Free Formula: The unique, tack-free formulation eliminates the need for extra steps, making the process easier and faster—no sticky residue, just a smooth, even surface every time.
✓Premium Quality: Includes a cream hardener for accurate mixing and consistent results, delivering a high-performance product that provides exceptional bonding and durability across a variety of materials.

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Bondo Bondo-Hair Long Strand Fiberglass Reinforced Filler, 00762, 1 Quart

Bondo Bondo-Hair Long Strand Fiberglass Reinforced Filler, 00762, 1 Quart

✓Long strands of chopped fiberglass deliver twice the strength of regular body filler
✓Fill holes up to 1” wide and rebuild missing pieces without backing strips, cloth or mat
✓Versatile filler works with fiberglass, metal and wood
✓Fast dry formula allows for sanding in only 20 minutes
✓Compatible with most paints and paint systems
✓Waterproof formula works great on cars and boats
✓Suitable for challenging projects such as rebuilding missing pieces, vehicle restoration, shattered fiberglass repair, filling metal rust holes up to 1” in diameter
✓Easy to use – includes step-by-step instructions
✓Use during the Fill stage of the 3M Body Repair System
✓Filler comes with Bondo Red Cream Hardener

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Ankita Marine Fiberglass Repair Kit for Boats - Gel Coat Repair Kit for Boats - Epoxy Filler for Fiberglass Boats Fix Holes, Chips, Deep Cracks, Chip Fix - White

Ankita Marine Fiberglass Repair Kit for Boats - Gel Coat Repair Kit for Boats - Epoxy Filler for Fiberglass Boats Fix Holes, Chips, Deep Cracks, Chip Fix - White

✓Permanently Repairs Nicks, Gouges and Scratches: A complete repair kit for fiberglass and gelcoat on boats; cures to a glass-hard, glossy, smooth, non-run and non-sag finish; for permanently repairs above and below the waterline
✓Ultra-Durable Results: Our fiberglass boat repair kit is water resistant, high fill-rate, and minimal slump, and able to withstand sun exposure, performing long lasting repairs to hulls, decks, transom and more
✓Dries to Glass Hardness: The fast-curing Ankita fiberglass repair kit is super tough after drying and resists shocks, collision and extreme temperatures for all water vehicles such as boat, jet ski, yacht and more
✓A Complete Kit to Tackle Minor Repairs: Ankita gel coat repair kit for boats has everything needed for the do-it-yourself repairs and can be applied to vertical surfaces; non-run and non-sag; no other primer is required and no prior repair experience is required
✓Enjoy the Results, or It’s on Us: Your satisfaction is important to us! If you don’t get the results you want from our product, we will solve your misgiving includes resupply flawless product or make up all value of your order

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Evercoat Everglass Short Strand Fiberglass Reinforced Filler - Waterproof Filler - 32 Fl Oz

Evercoat Everglass Short Strand Fiberglass Reinforced Filler - Waterproof Filler - 32 Fl Oz

✓Waterproof Filler: High-strength fiberglass reinforcement that is made for durability
✓Fiberglass Reinforced: Ideal for repairing holes, rusted metal, body seams, and shattered fiberglass
✓Effective Body Filler: Has unique formula with short strand, fiberglass for reinforcement
✓Versatile Surfaces Application: Our products are applicable on steel, aluminum, fiberglass, and more
✓Automotive Body Repair: We provide high-quality putty, primer, and body filler formulations

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