ClassicBond EPDM Internal Corner Patch – 150mm x 225mm

The ClassicBond Internal Corner Patch is a flexible uncured EPDM flashing patch designed for waterproofing internal roof corners and repairing punctures or localised damage in compatible EPDM roofing membranes.

Measuring 150mm x 225mm (6″ x 9″), the uncured EPDM material can be formed and moulded into difficult roof details, making it particularly useful where standard cured membrane or less flexible flashing products cannot conform effectively to the shape of the roof.

The patch is installed using ClassicBond Rubber Primer, allowing it to form a secure waterproof detail when correctly applied and rolled into position.

Please Note: ClassicBond Rubber Primer and an application brush or scrub pad are required for installation and are not included with the patch.

What Is a ClassicBond Internal Corner Patch Used For?

The ClassicBond Internal Corner Patch has two primary applications:

• Waterproofing internal EPDM roof corners
• Repairing punctures and localised membrane damage

Its uncured construction allows the material to be carefully formed around changes in angle and other complex details.

This makes it particularly useful for internal corners around upstands, parapets and similar EPDM flat roof details.

Features & Benefits

• Uncured EPDM flashing patch
• Designed for internal roof corners
• Suitable for repairing EPDM membrane punctures
• Measures 150mm x 225mm
• Equivalent to 6″ x 9″
• Highly flexible and formable
• Conforms to complex roof details
• Creates a waterproof EPDM detail
• Suitable for ClassicBond EPDM roofing systems
• Ideal for new installations and roof repairs
• Compact pre-cut patch
• Installed using ClassicBond Rubber Primer

Specifications

• Product: Internal Corner Patch
• Brand: ClassicBond
• Material: Uncured EPDM
• Width: 150mm / 6″
• Length: 225mm / 9″
• Application: Internal corners and puncture repairs
• Roofing System: ClassicBond EPDM
• Primer Required: ClassicBond Rubber Primer
• Primer Included: No
• Application Tool: Paint brush or scrub pad required

Designed for Internal EPDM Roof Corners

Internal corners can be one of the more difficult areas to waterproof on an EPDM flat roof because the membrane must accommodate multiple changes in direction within a relatively small area.

The ClassicBond Internal Corner Patch is manufactured from uncured EPDM, allowing the material to be formed around the corner and worked into the required shape.

This flexibility helps create a secure waterproof detail around internal corners where roof decks meet upstands, walls or other vertical surfaces.

Suitable for EPDM Puncture Repairs

In addition to internal corners, the patch can be used for repairing suitable punctures and localised damage to EPDM roofing membrane.

The damaged area should be properly cleaned and prepared before the appropriate ClassicBond Rubber Primer is applied.

The patch can then be positioned over the prepared area and firmly rolled to create a secure repair.

For larger or more extensive membrane damage, an alternative EPDM repair method may be required.

Why Use Uncured EPDM?

Unlike cured EPDM membrane, uncured EPDM flashing material is designed to be formed and moulded into complex shapes.

This makes it particularly useful for:

• Internal corners
• Changes in roof angle
• Awkward flashing details
• Localised membrane repairs
• Areas requiring a highly conformable flashing material

Once correctly installed as part of the EPDM roofing system, the patch provides a durable waterproof detail.

ClassicBond Rubber Primer Required

The ClassicBond Internal Corner Patch must be installed using the appropriate ClassicBond Rubber Primer.

The primer prepares the EPDM surface for application of the patch and is an essential part of creating the required bond.

You will also require a suitable paint brush or scrub pad to apply the primer.

Rubber Primer, paint brush and scrub pad are not supplied with this product and should be purchased separately if required.

Installation Preparation

Before installing the patch, ensure the EPDM membrane is appropriately prepared and free from contamination that could affect adhesion.

Apply ClassicBond Rubber Primer to the required area using a suitable brush or scrub pad, following the manufacturer’s current application instructions.

Allow the primer to reach the specified condition before installing the uncured patch.

Once positioned, use a suitable seam roller to apply firm, consistent pressure across the patch and into the detailed areas.

Always follow the current ClassicBond installation guidance when completing internal corners or membrane repairs.

Compact EPDM Corner & Repair Patch

At 150mm x 225mm, the ClassicBond Internal Corner Patch provides a convenient pre-cut piece of uncured EPDM flashing material for common detailing and repair applications.

Rather than cutting a patch from a larger roll of flashing tape, the pre-cut format provides a practical option where only a small amount of uncured EPDM is required.

ClassicBond EPDM Internal Corner & Puncture Repair

The ClassicBond Internal Corner Patch 150mm x 225mm provides a straightforward solution for two common EPDM roofing requirements: forming waterproof internal corners and repairing localised punctures.

Its uncured EPDM construction allows the patch to conform around difficult details, while the compact 6″ x 9″ size makes it convenient for individual repairs and corner installations.

Use with ClassicBond Rubber Primer and the appropriate application tools to create a secure and durable waterproof EPDM detail.