Waterproof Flashing That Sticks to Concrete
A waterproof flashing membrane that adheres well to concrete, comparable to silicone caulk, and spreads easily with an auto-body spreader. Consistency can vary between batches, with some thicker and some spreading very smoothly. It has an odor, so use only with adequate ventilation indoors, though the smell dissipates within about a day. Gloves are recommended because the material is sticky.
Pros
- + adheres well to concrete
- + spreads easily with an auto-body spreader
- + odor dissipates within about a day
Cons
- − noticeable odor
- − sticky and requires gloves
- − batch consistency can vary
AI-assisted summary of a verified Amazon customer review.
· February 11, 2026 · United States
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Excellent product, but pricey for the quantity
This product performs excellently, but the price is considered unreasonable for the amount provided. The quality is high, yet the cost relative to the quantity is a notable drawback.
Pros
- + excellent product quality
Cons
- − high price for the quantity
AI-assisted summary of a verified Amazon customer review.
· May 3, 2026 · United States
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Strong Weather Sealant That Holds Up
This sealant is a serious, high-performing product. It seals effectively and stays in place over time. It is described as an excellent choice for weather sealing. No drawbacks or specific use cases are mentioned.
Pros
- + seals effectively
- + stays in place
AI-assisted summary of a verified Amazon customer review.
· August 12, 2026 · United States
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Fluid-Applied Flashing Membrane Worth the Cost
This fluid-applied flashing membrane offers a strong alternative to tapes that may not perform well. It costs a bit more, but the final results justify the expense. It is used when preparing openings before installing doors and windows, and it performs so well that there is no reason to use anything else for that task.
Pros
- + better than tapes
- + worth the higher price
- + reliable results
AI-assisted summary of a verified Amazon customer review.
· September 4, 2026 · United States
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Top Fluid-Applied Flashing With No Seams
This fluid-applied flashing is the best of six products tried, mainly because it has no seams that could leak into framing. It can coat wood beyond the area directly under the window. For window framing, slope the bottom framing outward at least 5 degrees and do not seal the bottom fastening strip. Use foam rope around the inside opening and Prosoco Air Dam instead of urethane foam, which shrinks over time; Air Dam does not shrink and stays flexible.
Pros
- + No seams that could lead to leaks
- + Can coat wood beyond the immediate area under the window
- + Air Dam does not shrink and remains flexible
Cons
- − Urethane foam shrinks over time
AI-assisted summary of a verified Amazon customer review.
· June 25, 2026 · United States
Read original on Amazon ↗
