PSA302 is a 50mm x 1mm x 10 Metre Butyl Membrane Jointing & Sealing Tape is an extruded, preformed black butyl two-faced tape designed for use with joining epdm membranes used in the building and construction industry to prevent the passage of water, radon gas and or air – for example for damp proof membranes and vapour control layers, or for jointing pond liner – this tape is the perfect Airtight sealing tape.
This tape is suitable for joining two pieces of Butyl liner in a pond, sealing deck hardware on boats, holding permanently to polycarbonate sheets and similar applications.
Main application uses for this membrane tape include
This tape is ideal for use in the following applications or known as:
- Alkaline joint tape
- Sealing Radon barrier membranes
- EPDM membrane tape
- Join two pieces of Butyl liner in a pond
- Sealing deck hardware on boats
- Hold permanently to polycarbonate sheets
- For use on washing machines
- Waterproof roofing tape
- Waterproof joint sealing tape
- Roofing joint membrane
- Pond flexible flashing tape
- Flexible waterproof tape
Main features of this tape
This tape has:
- Good adhesion to a wide range of substrates.
- Easy and accurate to use with little waste and no mess.
- The softer composition makes this product highly conformable.
- High tack.
- Remains flexible throughout its service life.
- Excellent movement capability.
- Sealing in cold damp conditions.
Application information
Apply this tape directly from the reel onto one surface and press sufficiently along its length to achieve good initial adhesion. Remove the backing paper, offer another surface to the butyl tape and push firmly to seal across the joint.
The use of a roller to roll the joint, using firm pressure, is highly recommended to get a good bond.
Surface preparation advice
All surfaces should be clean, dry and free from frost, grease and loose materials. When cleaning contaminated substrates, we recommend that propane-2-ol (IPA) be used and allowed to dry before applying the butyl tape.
Storage information
This Butyl Membrane Tape has a shelf life of 24 months when stored flat in the original packaging in cool, dry conditions.
Technical Information
| Technical Description | Unit | Normal Value | Test Method |
|---|---|---|---|
| Dynamic Tensile Adhesion | N/cm2 | 19 | H5 |
| Dynamic Shear Adhesion | N/cm2 | 13 | H!5 |
| T-Peel Adhesion to 250-micron PE membrane | N/cm | 12 | H45 |
| 180° Peel Adhesion | N/cm | 15 | H41 |
| Density | g/cm3 | 1.5 | DS / ISO 2781A |
| Moisture Vapour Transmission Rate | g/m2/24hr/mm | 0.16 | ISO9932 / BS ISO 15106 |
| Service Temperature Range | °C | -30 to +100 |
Do you require a Certificate of Conformance and traceability?
If you require a Certificate of Conformance, please contact us after ordering (either by phone or email) and we will get this sent out to you with your order.

















Sean D. (verified owner) –
Brilliant product easy to use and very effective. Great service will definitely be using them again.
John (verified owner) –
Paul Fox (verified owner) –
Tony Harding (verified owner) –
Very good service