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Waterproofing Sealing Corners - Internal & External - Trade Quality
Waterproofing Sealing Corners - Internal & External - Trade Quality

Waterproofing Sealing Corners - Internal & External - Trade Quality

The Fail-Safe Solution for Critical Corner Joints & Angles

⭐⭐⭐⭐⭐ (1,085) | Rated 4.9/5 and 1,000+ customers satisfied

£5.00

Specifications

  • Product Type: Pre-formed Waterproofing Corner Pieces
  • Material: NBR Rubber with Fleece Edge
  • Variants Available: Internal Corner (AIC1) & External Corner (EIC1)
  • Application System: Used with cementitious waterproofing / tanking paste
  • Key Properties: Highly Flexible, Tear Resistant, Alkali Resistant
  • Usage Areas: Showers, Bathrooms, Kitchens, Terraces, Balconies
  • Function: Sealing expansion joints, wall-floor junctions, pipes, and drains
Pre-Formed Precision. NBR Rubber Strength. Zero Leaks.
Position

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Description

A pre-formed, NBR rubber corner piece for sealing internal / external corners when used in conjunction with cementitious waterproofing systems.

WHERE TO USE:

- Waterproofing corners between adjacent walls and between walls and floors

- Flexible waterproofing of expansion joints on terraces and balconies

- Sealing pipes and drains in bathrooms, showers and kitchens

- Sealing expansion joints in precast panels

Key Benefits:

- Highly Flexible

- Tear Resistant

- Interior & Exterior Use

- Compatible with Walls & Floors

- High Adhesion to Most Substrates

Built for Total Corner Security

Corners are the #1 weak spot in any waterproofing project. We have engineered these pre-formed NBR rubber corners to eliminate the risk of cutting and folding tape manually. Designed to work seamlessly with cementitious waterproofing systems, they provide an instant, 100% flexible seal for both internal and external angles.

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Features Aqua Waterproofing Tape
Waterproofing Corners ✓
Pre-Formed 90° Angle ✓
NBR Rubber Core ✓
Internal & External Options ✓
Tear Resistant Fabric ✓
Expansion Joint Safe ✓

Words From Our Valued Clients

4.8/5

I used to spend ages cutting tape and trying to fold it neatly into corners without it bunching up

I used to spend ages cutting tape and trying to fold it neatly into corners without it bunching up. These pre-formed corners just pop straight in. Worth every penny.

Darren S. (Pro Tiler)

The corner is always where the leak happens

The corner is always where the leak happens. Using a proper rubber corner piece like this guarantees it's sealed. I wouldn't do a wet room without them now.

WetRoom Wizards

The 90-degree shape is spot on

The 90-degree shape is spot on. It fits snug into the corner of the shower tray and the fleece edges bed down easily into the tanking gum.

P. Harrison

You can feel the quality of the NBR rubber

You can feel the quality of the NBR rubber. It's thick enough to be tough but flexible enough to handle a bit of movement in the stud work.

SafeSeal Bathrooms

Used the external corners for a balcony upstand detail

Used the external corners for a balcony upstand detail. Because they are rot-proof and suitable for outside, they were perfect for the job.

GreenLeaf Construction

I'm not a pro, so folding tape neatly is hard for me

I'm not a pro, so folding tape neatly is hard for me. These made my tanking job look professional. No creases or air bubbles.

Jenny M.

When you fold normal tape, you sometimes get a tiny pinhole right in the apex

When you fold normal tape, you sometimes get a tiny pinhole right in the apex. These are moulded in one piece so that can't happen.

T. Clarke

The fabric wings on the side grab the tanking paste really well

The fabric wings on the side grab the tanking paste really well. Once they are bedded in, they aren't moving.

Building Solutions Ltd

I used the external corners for a boxed-in pipe in a shower

I used the external corners (EIC1) for waterproofing around a boxed-in pipe in a shower. Made a tricky job very simple.

Harry O.

I used these with a different brand of tanking paint I already had

I used these with a different brand of tanking paint I already had, and they worked perfectly. The fleece seems universal.

L. Davies

For the price of a couple of coffees, you save yourself the worry of a leak

For the price of a couple of coffees, you save yourself the worry of a leak. A no-brainer for any bathroom renovation.

FixIt Phil

Ordered a mixed bag of internal and external corners

Ordered a mixed bag of internal and external corners. Arrived next day ready for the job. Excellent service.

R. Wilson

Your Questions, Answered

Internal (AIC1): Used for standard inside corners, like the corner of a room or shower cubicle (where two walls meet). External (EIC1): Used for outside corners, such as the edge of a boxed-in pipe, a window reveal, or the corner of a balcony upstand.

Apply a layer of your waterproofing compound (like Brit AquaSeal) to the corner. Press the pre-formed corner piece firmly into the wet compound. Smooth out the fleece edges with a trowel or brush, then coat over the entire piece with another layer of compound.

NBR (Nitrile Butadiene Rubber) is used because it is Highly Flexible and Tear Resistant. It can withstand the structural movement and thermal expansion found in bathrooms and balconies without cracking, unlike rigid plastic or simple fabric.

Yes. They are specified for Interior & Exterior Use. They are ideal for sealing expansion joints on terraces and balconies where weather resistance is crucial.

Yes. These corners handle the tricky 90-degree angles. You should then use Brit Waterproofing Tape to overlap the edges of these corner pieces and continue the seal along the rest of the wall or floor joint.

Yes. While primarily for corners, the flexibility of the material allows them to be adapted for sealing pipes and drains in bathrooms and kitchens where pipes penetrate the wall or floor.

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