Silicone Gun Works:

The gun consists of a frame that holds the sealant cartridge and a trigger mechanism. When you squeeze the trigger, a rod pushes a plunger inside the cartridge, forcing the sealant out of the nozzle in a controlled bead.

Types of Silicone Guns:

There are several types of silicone guns, ranging in price and functionality:

1. Skeleton Guns (Manual/Hand-operated):

   • Description: This is the most common and affordable type. It has a basic “skeleton” frame. You manually squeeze the trigger to push the plunger.

   • Pros: Inexpensive, lightweight, easy to use for occasional DIY tasks.

   • Cons: Can cause hand fatigue during prolonged use, less precise control over flow compared to more advanced types.

   • Common Use: Perfect for small home repairs, a few windows, or general DIY projects.

2. Closed Barrel Guns (Manual):

   • Description: The cartridge is fully enclosed within a metal or plastic barrel.

   • Pros: More durable, often provides smoother action and better control than skeleton guns. Less mess.

   • Cons: Heavier than skeleton guns, generally more expensive.

   • Common Use: Professional use where durability and consistent application are needed for multiple projects.

3. Dripless Guns (Manual):

   • Description: Many manual guns (both skeleton and closed barrel) now incorporate a “dripless” feature. When you release the trigger, a mechanism automatically retracts the plunger slightly, relieving pressure and preventing sealant from oozing out.

   • Pros: Reduces waste, mess, and cleanup time.

   • Cons: Slightly more expensive than basic models without this feature.

   • Common Use: Highly recommended for anyone who wants a cleaner application.

4. Power/Battery-Operated (Cordless) Guns:

   • Description: These guns use a motor and battery to push the plunger, eliminating manual effort. They often have variable speed control.

   • Pros: Effortless application, highly consistent bead, reduced fatigue, ideal for large projects.

   • Cons: Much more expensive, heavier, requires battery charging.

   • Common Use: Professional installers, large construction sites, or anyone who frequently applies a lot of sealant.

5. Pneumatic Guns:

   • Description: Air-powered guns connected to an air compressor.

   • Pros: Extremely powerful and consistent, high volume application.

   • Cons: Requires an air compressor, typically for industrial or very large-scale professional use.

Which Silicone Gun for uPVC?

For most homeowners or small-scale uPVC installation/repair tasks, a manual skeleton gun (preferably with a dripless feature) is perfectly adequate and cost-effective. If you’re a professional installer or have a very large project, investing in a heavy-duty manual gun or even a battery-operated one might be worthwhile.