01
Lowest
$0.31
per ounce
66% below median
8 lb Expanding Polyurethane Pour Foam: Quart Kit
$39.99
128 ounces
Price as of Sep 30, 5:01 AM ET · Details
Cheapest expanding foam per ounce
47 offers ranked · median $0.92 a ounce · checked Sep 30, 5:01 AM ET
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Ranked results
PriceCrow compares available Amazon listings for expanding foam, converts compatible package sizes to price per ounce, and sorts the results from lowest unit cost upward. This comparison uses current or recently cached Amazon data and may not include every listing, coupon, shipping charge, or Prime offer.
What is the lowest current price per ounce?
The lowest recorded result is $0.31 per ounce (66% below the median) — 8 lb Expanding Polyurethane Pour Foam: Quart Kit
Price range: $0.31 – $7.36 per ounce across 47 offers. Median sits at $0.92.
Top brands showing: Great Stuff, Fiberglass Supply, Red Devil.
How fresh are these Amazon prices?
This result set was last recorded (about 15 hours ago). Rerun the search to check for newer prices.
How should I use this comparison?
Use it as a shortlist, then confirm the product size, price, shipping, coupon terms, availability, and Prime eligibility on Amazon. Add qualifiers such as “organic,” “bulk,” or a brand name when you need a narrower result set.
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02
$0.47
per ounce
49% below median
Spray Foam Insulation Kit, Expanding Foam Sealant Spray, 18 Pack x 26.46 oz
$224.99
476.28 ounces
Price as of Sep 30, 5:01 AM ET · Details
03
$0.52
per ounce
43% below median
Loctite Tite Foam Gaps & Cracks Spray Foam Sealant, 12 fl oz Can, 1 Pack - Polyurethane Expanding Insulation
$6.28
12 ounces
Prime
Price as of Sep 30, 5:01 AM ET · Details
04
$0.55
per ounce
40% below median
TotalBoat 6lb Density Expanding Structural Polyurethane Boat Foam - 2 Qt
$52.99
96 ounces
Prime
Price as of Sep 30, 5:01 AM ET · Details
05
$0.56
per ounce
39% below median
Wremest Gaps and Cracks Spray Foam Sealant, 12 fl oz Can,6 Pack Polyurethane Expanding Filler Insulation,Indoor/Outdoor Use,Off-White
$39.99
71.41 ounces
Price as of Sep 30, 5:01 AM ET · Details
06
$0.62
per ounce
33% below median
Fiberglass Supply Depot 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)
$39.99
64.5 ounces
Prime
Price as of Sep 30, 5:01 AM ET · Details
07
$0.62
per ounce
32% below median
Kraken Bond Black Spray Waterfall Foam Sealant - (2x24oz) Expanding Polyurethane Pond Foam Sealer Black, UV Resistant Insulating Spray for Landscape & Exterior, Gun Use, Gun Not Included, 2 Pack
$29.99
48 ounces
Price as of Sep 30, 5:01 AM ET · Details
08
$0.65
per ounce
29% below median
GREAT STUFF Big Gap Filler | Insulating Foam Sealant, 12 oz. – Cream (8 Pack)
$62.69
96 ounces
Prime
Price as of Sep 30, 5:01 AM ET · Details
09
$0.67
per ounce
27% below median
Spray Foam Insulation Can (30 oz. / 850 g) Expanding Sealant, Mega Size Closed Cell Spray Foam Insulation, High Density, Walls Ceiling Windows Doors
$19.99
29.84 ounces
Price as of Sep 30, 5:01 AM ET · Details
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