Best Expanding Polyurethane in 2022 [*Top Picks*]

7216 Reviews Scanned

• Bestseller #1

  TotalBoat Flotation Foam - 2 Part Expanding Polyurethane Marine Pour Foam for Boat Floatation, Insulation and Soundproofing (2 LB Density, 2 Gallon Kit) (386)

  LIGHTWEIGHT, TWO PART POLYURETHANE FOAM: Ideal for adding buoyancy, thermal insulation, soundproofing, and filling gaps or voids; for nonstructural applications only; tested in accordance with U.S. Coast Guard Regulation # 33 CFR 183.114 EASY TO USE: Liquid urethane pour foam has a simple 1:1 mix ratio, expands rapidly & hardens in place in about 5 min. at 70-80°F; to build multiple layers for filling under boat decks, pour expanding foam in separate batches 94% CLOSED CELL FOAM: Perfect for marine applications; resists water absorption and damage from gas, oil or solvents; once cured, foam can be coated with polyester, epoxy or vinyl ester resin; can also be easily cut or carved to shape IDEAL WORKING TEMPERATURE IS 75-85°F; proper temperature, timing, mixing and venting are critical for proper foam expansion; below 75°F expansion decreases; after mixing, the foam expands rapidly and becomes rigid, so clean the surface in advance and be ready to pour AVAILABLE IN A 2 QUART KIT AND A 2 GALLON KIT; Yield: 2 Quart Kit – 2 cubic ft; 2 Gallon Kit – 8 cubic ft; Flotation Range for 2lb foam: 75 lbs per mixed 2 quart kit, and 300 lbs per mixed 2 gallon kit; shelf life is 6 months from date of manufacture

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• Bestseller #1

  Red Devil 0915 Foam & Fill Fire Block Expanding Polyurethane Foam Sealant, 12 oz, Orange, Pack of 1 (386)

  IDEAL FOR NEW CONSTRUCTION & REMODELING PROJECTS: Inhibits the Passage of fire through residential utility penetrations SEALS GAPS & PENETRATIONS: Excellent sealing against gas, smoke, and energy loss EASILY IDENTIFIABLE: Orange color provides easy identification TESTED & EVALUATED: Type V Residential Fireblock, Evaluated Per ICC-ES Report ESR-3402 & Tested According to ASTM E814 NFPA 290 SOLVENT CLEAN UP: Requires the use of a solvent for cleanup

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• Bestseller #1

  4 Lb. Density Expanding Pour Foam, 2 Part Polyurethane Closed Cell Liquid Foam for Boat and Dock Flotation, Soundproofing, Filling Voids, and Insulation (1 Gallon Kit) (276)

  Flotation Foam is a polyurethane 2-part foam that, when mixed in equal parts and poured in place this foam will soundproof, insulate, or provide extra buoyancy. 4LB. Density polyurethane flotation Foam 1 Gallon Kit; Consists of 1/2 gallon of Part A and 1/2 gallon of Part B and produces 2 cubic feet. Once fully cured this foam can be laminated over with any type of polyester, epoxy or vinyl ester resin without melting. The 4LB density also works well in floating decoy or taxidermy applications as well as many other sculpting, casting, carving and other filling applications All expansion rates and times given are temperature critical. Temperatures below 75° F will lower the expansion rate therefore requiring more foam. Ideal working temperature is 75° to 80° F or above. Accurate measuring of these products is extremely critical. Working time before foaming: approx. 45 seconds Time before full expansion: approx. 5 minutes

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• Bestseller #1

  Red Devil 0912 Foam & Fill Large Gaps & Cracks Expanding Polyurethane Sealant, 20 oz., Off-White, Pack of 1 (386)

  FILLS LARGE HOLES, GAPS & CRACKS: Ideal for insulating and preventing drafts USE INSIDE OR OUTSIDE: Can be used anywhere around the home SANDABLE, PAINTABLE & STAINABLE: Can be sanded, painted or stained after curing ADHERES TO: Painted and unpainted wood, concrete, cinder block, aluminum & fiberglass SOLVENT CLEAN UP: Requires the use of a solvent for cleanup

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• Bestseller #1

  4 Lb. Density Expanding Pour Foam, 2 Part Polyurethane Closed Cell Liquid Foam for Boat and Dock Flotation, Soundproofing, Filling Voids, and Insulation (Quart Kit) (276)

  Flotation Foam is a polyurethane 2-part foam that, when mixed in equal parts and poured in place this foam will soundproof, insulate, or provide extra buoyancy. 4LB. Density polyurethane flotation Foam Quart Kit; Consists of 1 pint of Part A and 1 pint of Part B and produces 1/2 cubic foot. Once fully cured this foam can be laminated over with any type of polyester, epoxy or vinyl ester resin without melting. The 4LB density also works well in floating decoy or taxidermy applications as well as many other sculpting, casting, carving and other filling applications All expansion rates and times given are temperature critical. Temperatures below 75° F will lower the expansion rate therefore requiring more foam. Ideal working temperature is 75° to 80° F or above. Accurate measuring of these products is extremely critical. Working time before foaming: approx. 45 seconds Time before full expansion: approx. 5 minutes

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• Bestseller #1

  2 Lb Density Expanding Pour Foam, 2 Part Polyurethane Closed Cell Liquid Foam for Boat and Dock Flotation, Soundproofing, Filling Voids, and Insulation (1 Gallon Kit) (276)

  Flotation Foam is a polyurethane 2-part foam that, when mixed in equal parts and poured in place this foam will soundproof, insulate, or provide extra buoyancy. This expandable foam is recommended for void filling in nonstructural applications. It can be poured underneath decks and inside cavities where a lightweight flotation foam is needed to provide buoyancy. 2# Density polyurethane flotation Foam 1 Gallon Kit; Consists of 1/2 gallon of Part A and 1/2 gallon of Part B and produces 5 cubic feet. Once fully cured this foam can be laminated over with any type of polyester, epoxy or vinyl ester resin without melting. All expansion rates and times given are temperature critical. Temperatures below 75° F will lower the expansion rate therefore requiring more foam. Ideal working temperature is 75° to 80° F or above. Accurate measuring of these products is extremely critical. Working time before foaming: approx. 45 seconds Time before full expansion: approx. 5 minutes

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• Bestseller #1

  2 Lb Density Expanding Pour Foam, 2 Part Polyurethane Closed Cell Liquid Foam for Boat and Dock Flotation, Soundproofing, Filling Voids, and Insulation (Quart Kit) (276)

  Flotation Foam is a polyurethane 2 part foam that, when mixed in equal parts and poured in place this foam will soundproof, insulate, or provide extra buoyancy. This expandable foam is recommended for void filling in nonstructural applications. It can be poured underneath decks and inside cavities where a lightweight flotation foam is needed to provide buoyancy. 2# Density polyurethane flotation Foam Quart Kit; Consists of 1 pint of Part A and 1 pint of Part B and produces 1.25 cubic feet. Once fully cured this foam can be laminated over with any type of polyester, epoxy or vinyl ester resin without melting. All expansion rates and times given are temperature critical. Temperatures below 75° F will lower the expansion rate therefore requiring more foam. Ideal working temperature is 75° to 80° F or above. Accurate measuring of these products is extremely critical. Working time before foaming: approx. 45 seconds Time before full expansion: approx. 5 minutes

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• Bestseller #1

  Red Devil 0913 Foam & Fill Small Gaps & Cracks Expanding Polyurethane Sealant, 12 oz, Off-White, Pack of 1 (647)

  FILLS SMALL HOLES, GAPS & CRACKS: Ideal for insulating and preventing drafts USE INSIDE OR OUTSIDE: Can be used anywhere around the home SANDABLE, PAINTABLE & STAINABLE: Can be sanded, painted or stained after curing ADHERES TO: Painted and unpainted wood, concrete, cinder block, aluminum & fiberglass SOLVENT CLEAN UP: Requires the use of a solvent for cleanup Use for Gaps & Cracks up to 1" in size Seals, Bonds & Insulates Fills holes up to 1" in ceilings floorboards concrete and cinder block walls

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• Bestseller #1

  TotalBoat 6 Lb Density Expanding Foam Kit, 2 Part Closed Cell Polyurethane Liquid Foam for Boat Flotation, Casting, Carving, Sculpture, Reinforcement and Void Filling (2 Gallon Kit) (386)

  TWO-PART, MARINE GRADE EXPANDING FOAM cures very hard and rigid, with high compressive strength ideal for a number of marine and residential applications, including structural reinforcement, architectural castings, art projects and flotation 6 POUNDS PER CUBIC FOOT HIGH-DENSITY FORMULA is perfect for casting, carving, sculpture, plug making, sign making, flotation for boats and buoys, floating decoys, part fabrication, replicating wooden parts, rigidifying, structural support and more FAST-SETTING, CURES TO A 94% CLOSED CELL FOAM, where each cell traps air and prevents liquids such as water, gas, and oil from penetrating; once fully cured, foam is compatible with epoxy, polyester or vinyl ester resins, and can be painted IDEAL WORKING TEMPERATURE IS 75-85°F. Proper temperature, mixing, timing and venting are critical for proper foam expansion; below 75°F expansion decreases; the foam expands rapidly after mixing, so prep the surface in advance and be ready to pour AVAILABLE IN A 2 QUART KIT AND A 2 GALLON KIT. Yield: 2-Quart Kit – 3/4 cubic ft, 2-Gallon Kit – 3 cubic ft; Flotation Range for 6lb foam: 23 lbs per mixed 2 quart kit and 92 lbs per mixed 2 gallon kit

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• Bestseller #1

  2 Lb Density Expanding Pour Foam, 2 Part Polyurethane Closed Cell Liquid Foam for Boat and Dock Flotation, Soundproofing, Filling Voids, and Insulation (2 Gallon Kit) (276)

  Flotation Foam is a polyurethane 2 part foam that, when mixed in equal parts and poured in place this foam will soundproof, insulate, or provide extra buoyancy. This expandable foam is recommended for void filling in nonstructural applications. It can be poured underneath decks and inside cavities where a lightweight flotation foam is needed to provide buoyancy. 2# Density polyurethane flotation Foam 2 Gallon Kit; Consists of 1 gallon of Part A and 1 gallon of Part B and produces 10 cubic feet. Once fully cured this foam can be laminated over with any type of polyester, epoxy or vinyl ester resin without melting. All expansion rates and times given are temperature critical. Temperatures below 75° F will lower the expansion rate therefore requiring more foam. Ideal working temperature is 75° to 80° F or above. Accurate measuring of these products is extremely critical. Working time before foaming: approx. 45 seconds Time before full expansion: approx. 5 minutes

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