Product Description

ProctorWrap HighTack PLUS Tape is a single sided pressure sensitive adhesive tape, made with an aggressive acrylic adhesive, designed primarily to repair, and seal overlaps and joins of external vapour permeable and internal vapour/air retarder construction membranes.

Applications

ProctorWrap HighTack PLUS Tape is ideal for air-tight bonding and sealing of overlaps of air/vapour retarders and vapour permeable membranes. The tape is suitable for bonding of smooth and slightly rough surfaces and can be used to provide a weathertight seal between construction membranes and clean concrete, steel framing or timber framing. This is only in addition to mechanical fixing of the membrane.

Installation

The tape can bond to polyolefin non-woven membranes, aluminium faced insulation boards, plastics, metals, timber, MDF and other manufactured timber sheathings. As with all pressure sensitive tapes, in order to ensure a strong bond, apply pressure with a squeegee and ensure the material is supported from behind when applying the tape. Surfaces being adhered must be dry and free of surfactants, release agents like grease or oil, and dirt or dust. Damp or cold surfaces may prove difficult to adhere to and should be allowed to dry and return to a temperature between +5°C and +40°C prior to application of tape. All mechanical load on membranes should be distributed to mechanical fasteners, the tape not being applied under mechanical load. The use of adhesive tape is not a substitute for the correct fixing of the materials. As there are many factors beyond our control that can impact on the use, performance and suitability of the product, we suggest that users evaluate the product to determine suitability for the application.

       Proctor Wrap HighTack Plus Tape The Other Half of the System

A membrane is only as good as its joins. Every lap, every penetration, every join between sheets is a potential gap in the weather barrier where most wall wrap failures start, not in the membrane itself. HighTack Plus is the acrylic lap tape built to seal those joins on ProctorWrap installs properly, rather than leaving them to whatever tape happened to be on the truck.

It's a point worth making plainly to anyone speccing or budgeting a membrane job: the membrane itself often gets all the attention in the spec, while the tape is treated as a minor line item. In practice, the tape is doing the work at every single join in the system, and a wall or roof with dozens of laps runs has dozens of opportunities for the tape to be the weak link if it's not matched properly to the membrane it's sealing.

Why the Tape Matters as Much as the Wrap

It's easy to treat tape as a finishing touch. Something you grab at the end of the job rather than something you speced upfront. But an unsealed lap performs the same as a hole in the membrane. Winddriven rain finds the gap, and once it's found one, it doesn't matter how good the membrane itself is either side of it.

This is one of the more common quiet failures in building envelopes, a membrane that's genuinely high spec, correctly installed, but sealed with a generic tape that wasn't matched to the substrate. Months or years later, the tape's bond has failed at the laps while the membrane itself is still performing fine, and the resulting leak gets blamed on "bad wrap" when the actual failure point was the tape.

Membrane Joining Tape, Not General Building Tape

HighTack Plus is built specifically as a membrane joining tape prefectly matched to how ProctorWrap behaves as a substrate, rather than a generalpurpose building tape that happens to be tacky enough to hold on the day.

A tape that isn't matched to the membrane's surface texture and flexibility can bond well initially and then fail as the membrane moves, expanding and contracting with temperature and flexing under wind load, especially on an exposed wall or roof run.

Acrylic Lap Tape What That Means for Performance

Why Acrylic

Acrylic adhesive holds its bond across a wider temperature range than some alternatives and doesn't rely on a curing period the way some tape chemistries do. Onsite, that means the bond is doing its job close to straight after application, not gradually strengthening over the following days while the walls already exposed.

That immediate performance matters in a real building sequence, a lap taped in the morning might face a rain event or strong wind that same afternoon, and a tape still relying on a multiday cure to reach full strength is at its weakest exactly when it's most likely to be tested.

Bonding to a Flexible Substrate

ProctorWrap membranes are pliable by design, otherwise the tape itself becomes the point of failure at the join instead of protecting it. A rigid tape on a flexible membrane creates a stress concentration right at the tape's edge, where the membrane can move but the tape resists over time, that mismatch is what causes edge lifting and eventual seal failure, even if the tape's initial bond strength looked fine on paper.

Temperature Performance on Australian Sites

Australian building sites see a genuinely wide temperature range across a single day in many regions. A tape that performs inconsistently across that range is a liability on a long install, since the crew doesn't get to choose what time of day they're taping a given run.

HighTack Plus as Wall Wrap Tape

Used to seal horizontal and vertical laps, penetrations, and junctions across a ProctorWrap wall wrap installs the same logic that applies to sealing roof sarking laps, wherever ProctorWrap membrane meets itself or another surface.

Surface Preparation Before Taping

Tape adhesion depends heavily on the substrate being clean and dry at the point of application. Dust, moisture or general site grime on the membrane surface at a lap join will compromise the bond regardless of how good the tape itself is. A fiveminute wipedown before taping a run is cheap insurance against a callback months later.

Ordering Tape Alongside Your Membrane

The same point applies here as on the wall wrap and sarking pages, not as an afterthought once the wrap's already up and someone's realised there's nothing to seal the laps with. Running out of tape midrun and substituting a generic product from the nearest hardware store is a genuinely common onsite workaround, and it's exactly the kind of shortcut that undermines an otherwise correctly specced membrane system.

Tape as Part of Warranty and Compliance

On a lot of jobs, the membrane's warranty or the build's compliance signoff assumes the full specified system was used membrane and matched tape together, not a substituted product at the joins. Using a nonmatched tape can technically void warranty cover even if the membrane itself performs fine, since the failure point that eventually shows up is at the join, not in the membrane sheet itself. Worth flagging to clients who ask why a specific tape is called out in the spec rather than "any acrylic tape" being acceptable.

Documentation for Certifiers

Where a build needs to demonstrate a compliant, continuous weather or air barrier for certification, insurance, or a passivehousestyle performance target using the matched tape system and keeping records of it (batch numbers, application photos) is a straightforward way to support that documentation later, rather than trying to reconstruct what was actually used on site after the fact.