Collection: Retrotec

Find the leak before the test does. The Wohler S 100 Smoke Stick and its three-pack of smoke tanks generate a fine, visible smoke that traces air movement around windows, junctions, penetrations and loft hatches — so you can pinpoint leakage paths and fix them with Passive Purple or Passivhaus Airtight Sealant ahead of the air test. Simple kit, quick answers, fewer failed tests.