Thermally broken fastener consisting of a 15 mm diameter grey polypropylene SFT tube, pre-assembled to either an SBF-SQ3 fastener or a TI-T25 fastener. The SFT tube has an integrated 50 mm diameter stress plate, with four large barbs which puncture and grip the membrane.
Only suitable for use in insulated Sarnafil applications. The Sarnafil membrane must be pre-punched with a Sarnafil SMP punch to avoid distortion of the membrane.