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Designed for Australian conditions
Engineered to withstand the harshest climates and built to last with premium materials, this product is crafted with care for everyday Australian life.
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Masons 150mm x 20mm 40 Below Flex is a self-adhesive flashing tape designed for sealing around windows, doors, and joinery openings to provide secondary water defence.
This product features an aggressively sticky surface that allows for easy application, making it suitable for various construction and repair tasks. The tape is designed to be nail and screw sealable with just one layer, ensuring a robust seal. Its white facer offers high water resistance and provides maximum UV protection for up to 270 days, making it ideal for outdoor use. Masons 150mm x 20mm 40 Below Flex is an essential tool for builders and DIY enthusiasts looking to enhance the waterproofing of their projects.
| Dimensions (W x H x D) | 150mm x 150mm x 150mm |
| Weight | 1.376kg |
| Material | Self-adhesive tape |
| Colour | White |
| Model Number | 150mm x 20m |
| Volume/Size | 20m |
Masons 150mm x 20mm 40 Below Flex is designed for effective sealing applications.
Specifications will vary by product. Please refer to the product description above or contact us before ordering if you need a specific measurement.
Orders are dispatched from our Sydney and Melbourne warehouses within 1–2 business days of payment. Delivery times from Sydney:
Tracking is provided on dispatch. Remote postcodes may incur additional fees.
We offer a 30-day change-of-mind return on select unopened products in original packaging (excluding health/safety items or bulk purchases). Email us within 30 days of delivery to start a return.
A restocking fee of 7–25% applies, plus return postage (unless approved otherwise). Customer-incurred postage costs are non-refundable without prior approval.
If your product arrives faulty or damaged, contact our support team with your order number, photos/videos of the fault, and the original packaging. Do not return items without a return authorisation.
12-month Australian warranty on this product unless noted otherwise. The warranty covers manufacturing defects under normal use.
The warranty does not cover:
To claim warranty: contact our support team with your order number, photos/videos of the fault, and a brief description. We will assess the claim and offer a replacement, repair, or refund as appropriate.
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A registered Australian business with real local support, transparent pricing, and fair returns.