Masons 40 Below™ Flashing Tape – 100mm x 20m

High‑Performance Self‑Adhesive Flashing for Windows, Doors & Joinery

40 Below Flashing Tape 100mm x 20m | Window & Door Flashing | Southtile Ltd NZ

SKU: 40below100x20

Barcode: 9421029152104

40 Below™ Flashing Tape is a trusted, high‑performance self‑adhesive flashing designed to seal around windows, doors, and joinery openings as a secondary defence against water penetration. With a long‑proven track record on New Zealand building sites, this classic white‑facer tape delivers exceptional adhesion, reliability, and value.

At only 0.2mm thin, it allows easier fitting of windows and doors while maintaining strong, dependable weather protection. Fully compatible with most building wraps and sealants, 40 Below™ eliminates compatibility issues and keeps installation simple.

Key Features

• Self‑adhesive flashing tape for windows, doors & joinery

• Suitable as a single‑layer application over timber framing

• Extremely thin (0.2mm) for easier window & door installation

• Performs from –40°C to +65°C

• Excellent adhesion in all conditions

• CodeMark Certified by CertMark International

Specifications

• Width: 100mm

• Length: 20m

• Thickness: 0.2mm

• Colour: White facer

• Application: Timber framing, joinery openings, window & door flashing Taping lintel bars

🚚 Delivery & Availability

• NZ‑wide delivery

• Click & Collect: Christchurch & Invercargill

• Available from Southtile Ltd – Building & Weather‑Tightness Supplies