A workaround guide about how to seal metal roof screws using a sealant to dispense the product to secure fasteners, while minimizing waste.
Written By: Corey Johnston
Sealing fasteners on metal roofs can be time-consuming and use up a lot of sealant. However, I recently discovered a workaround using an easy-to-make tool and your choice of roof sealant to dispense the perfect amount of product to secure fasteners, while minimizing waste and dramatically increasing your productivity.
This device is made for siphoning gas out of a car, but we are using it in reverse. You attach the tool to the cartridge of sealant (you can use a variety of roof sealants typically used for metal roofs) with PVC tubing and hose clamps. When you press the bell of the tool down on the fastener, it pushes on the interior marble, releasing just enough sealant for a pressure seal. Each time you lift the device off the fastener, the marble goes back down, prohibiting excess sealant from escaping. This simple process can seal as many as 2800 fasteners in an hour.
Here are the top benefits of incorporating this tool to seal metal roof fasteners:
Please note that results may vary by sealant chemistry and product manufacturer. This process is meant to complement, not replace, manufacturer application instructions so review those carefully to ensure compatibility.