The Pro Rodless Sealant Gun features an internal push rod design to make it easier to reach tight and hard-to-reach spaces such as behind sinks, internal cabinets or shower cubicles. Perfect for use with. Ideal for use with latex and silicone caulks. For your comfort, this sealant gun was designed with an ergonomic handle and is housed in lightweight reinforced polycarbon. It has a riveted and reinforced carriage and a belt hook for easy clip to tool belts. Suitable for all cartridges up to 400ml.