# LLPT JDT250 Joist Tape, 50mm x 15m, 8 Rolls

LLPT JDT250 joist tape is listed as eight 50mm x 15m rolls for decking and roofing construction. Its claimed waterproof, one-sided butyl adhesive design is aimed at covering timber joists, though customer feedback is mixed on adhesion and durability.

- [Original product page](https://bargainpostbox.co.uk/product/llpt-jdt250-joist-tape-50mm-15m-8-rolls)
- [View offer](https://bargainpostbox.co.uk/visit/llpt-jdt250-joist-tape-50mm-15m-8-rolls)
- Market: UK
- Language: en-GB
- Currency: GBP
- Brand: LLPT
- Model: JDT250
- Category: Tools & Garden > Hardware & Building Materials
- Price: 47.59 GBP
- Previous price: 55.99 GBP
- Discount: 15%
- Price checked: 2026-11-12T17:40:13.579Z
- Rating: 4.4 / 5
- Reviews: 523

Prices and deal status are the latest recorded data, not a guarantee of availability. Confirm the price and availability with the store.

## At a glance

- Eight rolls are listed, each measuring 50mm x 15m, for coverage across decking or roofing joists.
- The listing describes a butyl adhesive tape with a quick-release liner and recommends applying it to a clean, dry surface.
- The manufacturer claims resistance to water and weather, with an upper temperature rating of 80 Degrees Celsius.

## Pros

- Eight 15m rolls provide a substantial amount of tape for a multi-joist project.
- The stated width is 50mm, and the tape is intended for wood joists and beams.
- A quick-release liner is described to aid positioning and application.

## Specifications

### Identity
- Brand: LLPT
- Model: JDT250
### Dimensions and installation
- Roll size: 50mm x 15 m
- Number of rolls: 8
- Weight listed: 7.32 Kilograms
- Adhesive format: tape
- Adhesive side count: 2
- Adhesive location: one\_side
### Materials and protection
- Material listed: Paper, Rubber
- Adhesive material: Butyl
- Water resistance listed: Waterproof
- Compatible material: Wood
- Surface recommendation: Multi Surface
- Item resistance: high/low temperature, weather, water
- Upper temperature rating: 80 Degrees Celsius
### Adhesion
- Tensile strength: 110 Pounds Per Inch
### Use
- Recommended uses: Decking & Roofing Construction
- Colour: Black

## Before you buy

- Listing details are inconsistent: the tape is described as having two adhesive sides and also as adhesive on one side. Adhesion is listed as 110 Pounds Per Inch, while a feature description gives 50g/cm adhesive tensile strength. The claimed temperature range of -25°C to 80°C is broader than the technical table's upper rating alone. Confirm the intended adhesive configuration and applicable performance specifications before purchase. The claimed lifespan of up to 50 years is not independently established.

## A good fit for

- Deck builders or DIYers covering timber joists and beams with flashing tape.
- Projects where a pack of eight rolls and the stated 50mm width suit the planned coverage.

## Less suited to

- Buyers who need confirmed two-sided adhesion or independently verified long-term durability.
- Projects requiring a verified temperature range beyond the listed upper rating.

## Customer feedback

Customer feedback describes the tape as good quality, easy to use and functional, with some positive comments about value. Experiences with stickiness and durability are mixed, including reports that adhesion can be inadequate and that the tape may rip. For joist protection, those differences matter because reliable bonding and handling affect application. The listing's waterproof claim does not settle those customer-reported concerns.
- Positive themes: Customers report good quality, ease of use and useful functionality.
- Positive themes: Some customers consider it good value.
- Mixed feedback: Feedback is mixed on stickiness. Some say it adheres well, while others find it insufficient.
- Mixed feedback: Durability feedback is mixed, including reports of the tape ripping.

## Frequently asked questions

### How many rolls are listed?
The title and product details indicate eight rolls. Each is listed as 50mm x 15 m.
### What is the tape intended for?
The stated recommended uses are decking and roofing construction, and wood is listed as a compatible material.
### Is the tape adhesive on one side or both?
The listing conflicts: it gives an adhesive side count of two but also identifies the adhesive location as one\_side. Confirm the configuration before buying.
### What should I know about customer feedback?
Customers report positive experiences with quality, ease of use and functionality, but feedback is mixed on stickiness and durability, including reports of tape ripping.

## Alternative options

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## Images

![LLPT JDT250 Joist Tape, 50mm x 15m, 8 Rolls — 1](https://bargainpostbox.co.uk/i/_q-9zmqqiWkfJr8LXAI5mVGsqWIskUfwCmzsnjdPotbwJtDgSLuXpUNq0zwXq8fxoBvIU5DhINRtE90Ydg_Q_c0blR3Q9xs44UQYM18Wtpa1T_MxwcbZ.jpg)

![LLPT JDT250 Joist Tape, 50mm x 15m, 8 Rolls — 2](https://bargainpostbox.co.uk/i/wKfDgZlcKbBHA2p-bFvB-AVD7dc4-kqHRLA2Bxr4IJ5goTQFBlFtATLp5R_-bMzL73xELkDmNAgoNsWsyqKT3sxb-zDCdUcWtfxi020JtbSOnuxBa7Nj.jpg)

![LLPT JDT250 Joist Tape, 50mm x 15m, 8 Rolls — 3](https://bargainpostbox.co.uk/i/gOtQuG_NViZJ1_3M7QqLNsoM5hPJkDu-w8I1CNlIwmPCg_lGb7QAFr6nXM2AVCoUIKFdFcGejC3IY2DZRkOLGp66uZnuyyQhyTIjAZo4fMwb9BhF2kR7.jpg)

![LLPT JDT250 Joist Tape, 50mm x 15m, 8 Rolls — 4](https://bargainpostbox.co.uk/i/kJbI60Di8xcjjsWfsBi-BmK2yak8AONWjg5kib7nl7mjUJANB6OLtQMyuq3xrIocuDfZzqK4ZdJcRrHa8jJKMGxj6tlH83G64PFKwqPEtWqe8WZaHszw.jpg)

![LLPT JDT250 Joist Tape, 50mm x 15m, 8 Rolls — 5](https://bargainpostbox.co.uk/i/7ma0UPmNx51xjBl858FAn_PtAP2J03_Uevr1e9rr7bcZsTLwWJ5QBQKFQlfoTF9Ha0_6v1w1YVHpmP1jqqSBtvaMrd45foYLWunsXg12xamkrXstZA4D.jpg)

![LLPT JDT250 Joist Tape, 50mm x 15m, 8 Rolls — 6](https://bargainpostbox.co.uk/i/x-ufzWb3qMp_l_KjKSOmMcD4CcoB1zKiWOrUKmELfRDYJPY-v6SaCLsJD96sdGJCxy0edUY7gPuoPfmX6bB2zck-oyFnyoPyExnSaQj_zrTLwrke73o6.jpg)

![LLPT JDT250 Joist Tape, 50mm x 15m, 8 Rolls — 7](https://bargainpostbox.co.uk/i/TIcfQb5b6smWasxjMm5o9VyYf-1MoBJ728ocjdWMRqXYlhrnWWQw0LO0PzI1VUvDJwX-lvxdSntCjlklwpUE-muYBUSCcuRsKp1r3uEWfGhPM4bOtYVH.jpg)