MOLYLY Joist Tape, 1-5/8 in x 50 ft, 6 Rolls

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Product guide

MOLYLY Joist Tape, 1-5/8 in x 50 ft, 6 Rolls

Rolls: MOLYLY joist tape is a six-roll, self-adhesive butyl tape listing for deck joists and other building surfaces. Its stated width suits narrower coverage, while the listing's roll-count and item-count fields disagree, so confirm the pack quantity before ordering.

At a glance

The listing describes self-adhesive butyl tape intended for joists, decks, beams, roofs, and sheds.
The feature text claims flexibility and adhesion from -20°F to 230°F.
The seller describes cutting the tape to length and applying it to a clean surface.

Price

$23.96Save 48%

Reference price: ~~$45.99~~

Price checked: Nov 14, 2026

View offer Ahead of Black FridayExplore the selection

Often bought together

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Pros and cons

Pros

Six 50-foot rolls would provide multiple lengths to cut for a decking project, if the title's stated pack quantity is accurate.
The product listing specifies butyl adhesive and describes a waterproofing use for wood framing.
Customer feedback reports good adhesion, including staying in place during decking installation.

Cons

The listed width is 1-5/8 inches, so it offers less coverage per pass than wider joist tapes.

Technical specifications

12 specifications

Identity
Brand	MOLYLY

Materials and protection
Water resistance listed	Waterproof
Material listed	Plastic
Adhesive material	Butyl
Color	Black
Surface recommendation	Wood
Item resistance	heat_resistant, cold_resistant

Size and application
Roll size	1-5/8" x 50' Joist Tape
Item thickness	1.63 inches
Adhesive format	Wide Roll
Adhesive side count	1
Adhesive location	top of joist

What to know before buying

Listing details to confirm

The listing is inconsistent about quantity: the title and feature text say six rolls and 300 feet total, while the product details say 4 items and 6 packs. It also lists material as Plastic while describing butyl adhesive, and claims flexibility down to -20°F and up to 230°F without independent confirmation. Verify the selected pack quantity and material description before purchase.

What’s in the box

Included

Joist Tape

Who is it for?

A good fit for

Deck builders wanting narrow, cut-to-length tape for joists or framing.
Buyers who prefer rolls of self-adhesive tape and can apply it to a clean surface.

Less suited to

Projects needing wider coverage per joist pass.
Buyers who need a confirmed roll count or independently substantiated temperature-performance limits.

MOLYLY Joist Tape, 1-5/8 in x 50 ft, 6 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 is generally favorable about adhesion, quality, functionality, and waterproofing, with some reports that the tape stays in place during deck installation. Customers also describe it as useful for build budgets. Application experiences are mixed, so the peel-and-stick format may still take care to position and handle. This is relevant for a tape the listing says should be cut to length and applied to a clean surface. The positive feedback reflects reported customer impressions, not verification of the listing's waterproof or temperature claims.

Positive themes

Customers report good adhesion and say it can stay put during decking installation.
Feedback also praises perceived quality, functionality, waterproofing, and value.

Mixed feedback

Application receives mixed feedback, with some finding the tape easy to use and others finding it difficult to work with.

Frequently asked questions

How many rolls are listed?

The title and feature text describe six rolls of 1-5/8-inch by 50-foot tape, but the product details list 4 items and 6 packs. Confirm the selected listing's quantity before ordering.

What adhesive does the listing specify?

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

What temperature range is claimed?

The feature text claims the tape withstands temperatures from -20°F to 230°F. This is a listing claim, not an independently verified result.

What surfaces does the listing mention?

Wood is listed as the recommended surface. The feature text also mentions metal, plastic, and rubber.