Roofing kits are designed for TPO, PVC and EPDM membrane welding for roofers and waterproofers. Each kit combines a hot-air welder (hand or, for larger areas, an automatic overlap welder), the correct nozzles and pressure rollers, and the accessories needed to lap-weld membrane seams reliably.A properly hot-air-welded membrane seam is stronger and more durable than adhesive or tape, which is why welding is the standard for commercial flat-roof and waterproofing work. The kit gives installers a matched system for consistent, weather-tight seams. For large production runs, pair it with an automatic welder. Need help choosing between a hand kit and an automatic setup? See our buying guide or talk to our team.