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Best structurals - February 2026

Last Updated - February 16, 2026

1
Best Choice

✖
Our rankings are cleverly generated from the algorithmic analysis of thousands of customer reviews about products, brands, merchant’s customer service level, popularity, trends and more. The rankings reflect our opinion and should be a good starting point for shopping.

TotalBoat

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

TotalBoat

$97.99

More Details
Main highlights
- 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
- 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
- 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
- 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
$97.99
2

✖
Our rankings are cleverly generated from the algorithmic analysis of thousands of customer reviews about products, brands, merchant’s customer service level, popularity, trends and more. The rankings reflect our opinion and should be a good starting point for shopping.

TotalBoat

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

TotalBoat

$97.99

More Details
Main highlights
- 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
- 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
- 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
- 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
$97.99
3
Best Value
13% Off

✖
Our rankings are cleverly generated from the algorithmic analysis of thousands of customer reviews about products, brands, merchant’s customer service level, popularity, trends and more. The rankings reflect our opinion and should be a good starting point for shopping.

Thames & Kosmos
13% Off

Thames & Kosmos Structural Engineering: Bridges & Skyscrapers | Science & Engineering Kit | Build 20 Models | Learn about Force, Load, Compression, Tension | Parents' Choice Gold Award Winner, Blue

Thames & Kosmos

$43.35

$49.95
(13% Off)

More Details
Main highlights
- Skill level: Intermediate
- Over 285 interchangeable building pieces
- Includes 36-page, illustrated experiment manual and Assembly guide
- Build 20 different models that each teach about force, load, compression, tension and more
$43.35
$49.95 (13% Off)
4

✖
Our rankings are cleverly generated from the algorithmic analysis of thousands of customer reviews about products, brands, merchant’s customer service level, popularity, trends and more. The rankings reflect our opinion and should be a good starting point for shopping.

3M

3M Impact Resistant Structural Adhesive, 07333, Two-Part Epoxy, True Automotive OEM Recommended, 200 mL/6.75 fl oz Cartridge, Purple

3M

$80.29

More Details
Main highlights
- STRONGER ADHESIVE:Higher impact strength versus traditional bonding adhesives
- SPECIALLY FORMULATED: Adheres to a wide variety of properly prepared steel and aluminum substrates
- PROFESSIONAL GRADE: Recommended by many OEMs
- NOZZLE INCLUDED: Includes static mixing nozzle
- LIFETIME WARRANTY: Provides corrosion protection with lifetime warranty
- For industrial/occupational use only. Not for consumer sale or use.
- COLOR INDICATED CURING: Dispenses silver, color changes to purple to indicate proper mixing and curing process has begun
$80.29
5

✖
Our rankings are cleverly generated from the algorithmic analysis of thousands of customer reviews about products, brands, merchant’s customer service level, popularity, trends and more. The rankings reflect our opinion and should be a good starting point for shopping.

3M

3M Impact Resistant Structural Adhesive, 07333, Two-Part Epoxy, True Automotive OEM Recommended, 200 mL/6.75 fl oz Cartridge, Purple

3M

$80.29

More Details
Main highlights
- STRONGER ADHESIVE:Higher impact strength versus traditional bonding adhesives
- SPECIALLY FORMULATED: Adheres to a wide variety of properly prepared steel and aluminum substrates
- PROFESSIONAL GRADE: Recommended by many OEMs
- NOZZLE INCLUDED: Includes static mixing nozzle
- LIFETIME WARRANTY: Provides corrosion protection with lifetime warranty
- For industrial/occupational use only. Not for consumer sale or use.
- COLOR INDICATED CURING: Dispenses silver, color changes to purple to indicate proper mixing and curing process has begun
$80.29

Best structurals - February 2026

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

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

Thames & Kosmos Structural Engineering: Bridges & Skyscrapers | Science & Engineering Kit | Build 20 Models | Learn about Force, Load, Compression, Tension | Parents' Choice Gold Award Winner, Blue

3M Impact Resistant Structural Adhesive, 07333, Two-Part Epoxy, True Automotive OEM Recommended, 200 mL/6.75 fl oz Cartridge, Purple

3M Impact Resistant Structural Adhesive, 07333, Two-Part Epoxy, True Automotive OEM Recommended, 200 mL/6.75 fl oz Cartridge, Purple

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

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2-Part Structural Epoxy for Metal Repair — Load-Bearing Cold-Weld Style Strength, Drillable • 392°F Heat-Resistant • Waterproof Bond, 1.69 oz

2-Part Structural Epoxy for Metal Repair — Load-Bearing Cold-Weld Style Strength, Drillable • 392°F Heat-Resistant • Waterproof Bond, 1.69 oz

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