A versatile and high-performance solution for creating airtight and waterproof seals in construction projects.

Certified for use with both standard and radon damp proof membranes, this 2-in-1 jointing tape is specifically designed to securely hold DPM sheets in place, ensuring a continuous seal at joints, overlaps, and around service penetrations or protrusions. Its innovative formulation, made from premium butyl rubber, provides excellent adhesion to all types of damp proof membranes while maintaining the flexibility required to conform to uneven or irregular surfaces. This guarantees long-lasting protection against moisture ingress, preserving the integrity of the membrane even in challenging conditions. Ideal for use by builders, contractors, and installers, Walther Strong DPM Butyl Tape not only meets but exceeds the requirements for both standard damp proofing and radon protection. This makes it a reliable choice for safeguarding buildings from water and gas ingress, while also complying with modern building standards. Its ability to maintain airtightness and continuity, even around complex penetrations and overlaps, ensures it plays a crucial role in achieving necessary building airtightness requirements, providing confidence and peace of mind to construction professionals.

  • Size: 50mm x 10m
  • Butyl rubber ensures flexibility and adhesion
  • Certifiably works with standard and radon DPMs
  • Maintains airtight and waterproof seals
  • Compatible with all damp proof membranes
  • Ideal for builders and contractors
  • Keeps moisture and gas ingress at bay
  • Meets modern airtightness standards

£4.99 Standard Delivery, or FREE on most orders over £99* (some exclusions apply)

£9.99 Next day delivery is available for orders places before 12 noon. Any orders placed for next day delivery after this time, will take 2 working days to be delivered.

Working/delivery days are Monday to Friday, deliveries will not normally be made Saturday or Sunday.

We offer a 30-day returns policy on on the majority of our items*, as long as the item is unused, undamaged and unopened**. We only ask that the postage is covered by yourself. 


* Please see our delivery page for further details on specific exceptions.

** Some products that are made to order or personalised cannot be returned.

***Exclusions apply for items shipped directly from our suppliers, and some big & bulky items may incur an additional charge. Please see our delivery page for full details. 

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Walther Strong 50mm x 10m DPM Butyl Double Sided Tape

  • $12.28
  • (Delivery from $6.85 )
Item in Stock   |   Usually dispatched within 24 hours
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Free UK Delivery on most orders over £99
Delivery Rates & Information

Delivery Options

Standard Delivery: £4.99 - Free for all orders over £99.*
Next Day Delivery: £9.99 - Available for orders placed before 12:00 PM (Noon).

Important Delivery Notes

Next Day Delivery Cut-off: Orders placed after 12:00 PM (Noon) using Next Day Delivery will be delivered within two working days.
Working Days: Our standard delivery and shipping days are Monday through Friday. We do not normally deliver on Saturdays or Sundays.

Easy 30-Day Returns

We want you to be happy with your purchase! We offer a 30-day returns policy on all items, provided the following conditions are met:
  • The item is unused and undamaged.
  • The item is returned in its original packaging.
  • The customer is responsible for the return postage costs.

Combining Your Order

We always strive to combine your order into a single delivery. However, your order may arrive in multiple shipments if it contains:
  • Items from different warehouses (Standard items).
  • 'Direct' items (These are shipped separately and directly from the supplier) and will arrive separately from other items in your order.

*Exclusions & Additional Charges

The following items may be excluded from standard shipping rates or may incur extra delivery charges:
  • Items Shipped Directly from Suppliers ('Direct' items).
  • Certain Large or Bulky Items.
Want it by Tuesday 27th October? Order within 4 hours, 56 minutes