Will this work with husky 10 mil poly vapor barrier? also does it hold up over time? crawl space encapsulation project ...

I used it for crawlspace encapsulation. Very strong and stuck well. I used 12mil poly. I cannot speak to how well it holds up over time as I recently just completed the project

Could I effectively seal this against a concrete crack using PU (or other) caulk/sealant?

I don't think it would seal/stick to the concrete.

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🛠️ Seal smart, seal strong — don’t let moisture crash your space!

BUILT TO LAST - Commercial-grade polyethylene tape designed to withstand harsh UV rays without losing adhesion.
DIY ESSENTIAL - Trusted by contractors and enthusiasts alike—combine with quality scissors for precision sealing every time.
GENEROUS LENGTH - 55 yards per roll means fewer replacements and more uninterrupted projects.
SEAL WITH CONFIDENCE - Creates a waterproof, weatherproof barrier that locks out moisture and protects your space.
VERSATILE APPLICATION - Perfect for crawl space encapsulation, marine use, and sealing leaks on multiple surfaces like glass, metal, plastic, and wood.

My DIY Center Vapor Barrier Seam Tape is a 4-inch wide, 55-yard roll of commercial-grade polyethylene tape that provides a durable, UV-resistant waterproof seal. Ideal for sealing vapor barrier seams in crawl spaces, marine environments, and various surfaces, it ensures long-lasting protection against moisture and weather damage.

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Brand	CrawlSpace-DIY
Material	Polyethylene
Number of Items	1
Special Feature	Uv-Resistant
Surface Recommendation	Glass, Metal, Plastic, Wood
Size	4x180
Manufacturer	MY DIY CENTER
UPC	850031818026
Country of Origin	USA
Model number	STAPE
Item Weight	1 kg 140 g
Product Dimensions	17.78 x 15.24 x 10.16 cm; 1.14 kg
Item model number	STAPE
Item Height	4 Inches
Item Width	6 Inches

My DIY Center Vapor Barrier Seam Tape

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