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DECK TAPE® 50mm x 20m Black (Recommended for use on top of joists)

£23.99 Each

Exposure to the elements outdoors can result insignificant deck frame weathering.  The most common area for this damage to occur is where the deck boards come in contact with the deck substructure.  Protect your deck substructure with Walther Strong DeckTape®.


  • Watertight
  • Air-and smoke-tight
  • Easy release
  • Stickiness
  • UV stable
  • Self-sealing
  • Tape can be easily overlapped without added any significant height which could     interfere with the deck board heights
  • Easy to slide boards along taped joists when installing
  • If screws are removed, no residue is left on the screw
  • Tape doesn’t stick to itself on the adhesive side – no wastage


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DECK TAPE® 50mm x 20m Black (Recommended for use on top of joists)



Deck Tape® is a non-butyl tape.

Non-Butyl tapes are particularly suitable for this application as they are completely UV stable and keep their integrity for longer.  This means that they have many advantages over both butyl and asphalt tapes.

In addition to this, it is stable from -40C to +93Cwith no cracking, peeling or strength loss.


Joist Protection

Simply applying a strip of Deck Tape® along the top of the joists as a ‘cap’ (rather than a wrap) protects the timber as it creates a strong seal from any moisture.  50mm Deck Tape® works particularly well on standardised 2 inch timber as it acts as a ‘cap’ (slightly overlapping the edge of the timber) rather than a wrap.  This prevents any moisture sitting on these flat surfaces and slowly rotting away the timber.

Deck Tape® can be applied to joists in advance to the deck boards being fitted – It doesn’t deteriorate or affect the benefits and qualities that the tape brings to the deck.

Joist Hanger Protection

Traditionally the coating on the metal would have slowly corroded away the metal and brought weakness in.  However, by simply applying a layer of Deck Tape® this prevents the breaking down of the treatments so the subframe of your deck maintains its integrity.


Use Deck Tape® on timber posts to create a waterproof and moisture-tight seal. Particularly useful for fence posts and any other timber that has contact with the ground.

Cut Ends

Generally this is a particularly weak spot for the moisture to start rotting the timber since there will not be any treatment on this part as it has been cut to size.  Using one layer of Deck Tape® will completely seal it off from all moisture and water-rotting or weathering.

Around fasteners

Apply a layer of Deck Tape® between the galvanised fixings and treated timber to prevent the fixing from corroding.

Additional information

Weight 2 kg


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