MOLYLY Butyl Deck Joist Tape, 1-5/8 in x 50 ft, 12 Rolls

1 / 7

Product guide

MOLYLY Butyl Deck Joist Tape, 1-5/8 in x 50 ft, 12 Rolls

MOLYLY Butyl Deck Joist Tape is listed as twelve 1-5/8-inch-wide, 50-foot rolls for decking and other outdoor construction. Its listed dimensions conflict with the title’s width and the stated roll length, so confirm measurements before planning coverage.

At a glance

The title and feature text describe 12 rolls, each stated as 1-5/8 inches by 50 feet, and claim 600 feet total.
The listing describes a self-adhesive butyl tape for joists and says to apply it to a clean surface.
The listing claims weather resistance and flexibility from -20°F to 230°F.

Price

$59.98Save 33%

Reference price: ~~$89.99~~

Price checked: Nov 12, 2026

View offer Ahead of Black FridayExplore the selection

Often bought together

JOAPRIL Butyl Joist Tape for Decking 2''×50', 10 Rolls Waterproof Deck Tape | Joist Tape, Waterproof and Anti-Corrosion Joists Deck Tape, Self Adhesive Flashing Joists Tape for Wood Decks Beams Roof

$81.21

Oleitodh 4 Rolls Butyl Joist Tape for decking, 4 Inch x 50 Feet | Weatherproof Butyl Sealant Deck Tape Joist-Beam Deck Joist Tape Bulk for Wood Joists Decks Beams Roof

$72.99

Pros and cons

Pros

Twelve rolls and a stated combined length of 600 feet may suit a larger decking project, if the title’s roll dimensions are accurate.
Butyl adhesive and waterproofing are relevant to the listing’s intended use protecting wood framing from moisture.

Technical specifications

8 specifications

Identity and pack
Brand	MOLYLY
Number of items	12

Dimensions and installation
Dimensions listed	1.63"W x 1.63"Th
Title size	1-5/8" x 50' Joist Tape

Materials and protection
Water resistance listed	Waterproof
Adhesive material	Butyl
Surface recommendation	Wood
Temperature range claimed	-20°F to 230°F

What to know before buying

Listing details to confirm

The listing's dimensions are contradictory: its details field gives 1.63"W x 1.63"Th, while the title and feature text state 1-5/8" x 50' per roll and the feature text claims 600 feet total. Confirm roll width, length, and total coverage before purchase. The waterproofing, weather-resistance, and temperature claims are listing claims, not independent measurements.

What’s in the box

12 rolls of joist tapeCheck selected pack

Check which accessories are included in your selected pack before buying.

Who is it for?

A good fit for

Deck builders seeking multiple rolls of narrow joist tape for wood framing.
Buyers planning a project where a claimed 600 feet of tape would be useful, after confirming roll dimensions.

Less suited to

Buyers who need verified dimensions or a confirmed coverage total before purchasing.
Projects requiring a tape width other than the stated 1-5/8 inches.

MOLYLY Butyl Deck Joist Tape, 1-5/8 in x 50 ft, 12 Rolls · photo 2 — Additional product photo 2

Customer reviews on Amazon

4.6 / 5 · 176 ratings

5 stars76%76%
4 stars16%16%
3 stars4%4%
2 stars1%1%
1 star3%3%

Customer feedback highlights perceived adhesion, quality, functionality, and waterproofing, with some customers saying the tape stays in place during decking installation. The application experience is mixed, with feedback describing it as both easy and difficult to work with. For buyers planning a large project, the favorable adhesion comments are relevant, but they do not resolve the listing's conflicting dimensions or establish a verified coverage total.

Positive themes

Customers report positive experiences with adhesion, quality, functionality, and waterproofing.

Mixed feedback

Customer feedback on application is mixed, with some finding the tape easy to use and others finding it difficult to work with.

Frequently asked questions

How much tape is included?

The title and feature text claim 12 rolls measuring 1-5/8 inches by 50 feet each, with 600 feet total. The dimensions field conflicts with those claims, so confirm the roll length before relying on that coverage.

What adhesive does the listing specify?

It lists butyl adhesive and describes the tape as self-adhesive.

What temperature range is claimed?

The feature text claims a range of -20°F to 230°F. This is a listing claim, not an independently verified performance result.