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Umail 4Pcs 16”x 18” Expanding Foam Packaging, Expanding Foam for Shipping, PC Packing Foam, Packaging Foam Bags
✅ In stock
📉 Price recently dropped
D
Grade
Analysis Confidence
55%
⚠️ Price may have changed. Last updated 24+ hours ago — confirm on Amazon.
Check Deal at Amazon
Price verified Oct 28, 2026 9:41 AM · Prices & availability subject to change
Is This a Good Price on Amazon?
😐 Weak Deal- 😐Verdict: Weak Deal. Marginal discount. Prices may drop further soon.
- 💰The price is modestly below what this product ordinarily sells for.
- 📉Pricing has not dipped this low in roughly six months, placing this offer among the better deals in that window.
- 📈The direction is downward at the moment; if that holds, an even better price may surface — though timing the market is never certain.
How We Scored This Deal
Price Competitiveness
6.79/28
Recent Value
0/22
Market Standing
10/20
Deal Strength
10/20
Momentum
10/10
📝 Product Overview
🏪 Sold by
Umail
📦 Fulfillment
Fulfilled by Amazon
🚚 Shipping
Free Shipping
Product Details
✓PACKING SOLUTION: Umail’s expanding foam packaging are use on an industrial scale for packaging odd shaped products, or oddly shaped items, meters, vases, sculpture, crafts, and even a fully built PC with GPU installed, pc packing foam, pc shipping foam
✓WORK QUICKLY: As you crack “L” symbol it immediately comes in contact with the reactant in “R” symbol. You have few seconds to thoroughly combine the two before the final product bursts through a membrane and fills the envelope, be prepare to use quickly
✓EASY TO USE: Place foam bag on desk, crack “L”, you will hear “peng” sound, then slap “L” and “R” with both hands quickly. Pat about 25 times as quickly as you can. Wait for liquid expand and break through L/R area, quickly distribute liquid evenly throughout bag. Note: Only simple spreading to all corners of the bag is required here (e.g., follow the video instructions). If you keep spreading during the foaming process, it will disrupt the progression, causing an unsmooth foaming reaction and insufficient expansion
✓WHAT YOU WILL GET: 4 pcs individually packaged expanding foam packaging bags. We recommend used for box size of 10"x10"x10". Please note that the heat generated when slapping the pc shipping foam bag is normal and it will soon return to room temperature
✓WATCH TUTORIAL: If first time user, watching tutorial or instructional video to get a better understanding of how foam expands and how to apply it properly. This will help ensure a good results and prevent expandable foam from expanding more than intended
✓SHIPPING PC: According to experience, when using expanding foam for pc shipping, please place it in case as soon as bag starts to expand. It will automatically adapt to the shape of computer, providing protection, not wait until bag expanded significantly
⚙️ Specifications
Brand
Umail
Material
Plastic
Product Dimensions
18"L x 16"W
Color
Quantity 4
Item Weight
1.2 pounds
Brand Name
Umail
Unit Count
1 Count
Manufacturer
Umail
Number of Items
1
Included Components
Bag
Model Number
16*18 4pcs
