Selleys Pro Trade All Purpose Silicone 300g

• Surface Preparation: Ensure surfaces are clean, dry, and free of grease or loose paint. Complete any painting before applying the sealant.
• Joint Dimensions: For internal joints, the width and depth should be a minimum of 5mm. For external joints, use 10mm. For joints deeper than 10mm, use a backing rod. Maximum joint width is 30mm with a depth of 15mm. Maintain a 2:1 width-to-depth ratio for the silicone.
• Masking Tape (Optional): Apply masking tape to both sides of the joint for a neat, professional finish. Remove the tape before the sealant dries.
• Cartridge Preparation: Cut the end of the cartridge seal with a utility knife and screw on the nozzle. Cut the nozzle at a 45-degree angle to control the bead size.

Application:

• Insert the cartridge into a caulking gun.
• Apply the sealant in a continuous bead, ensuring good contact with both sides of the joint. Hold the gun at a 45° angle and pull it towards yourself.
• Apply at temperatures between 5°C and 40°C.

Finishing:

• Tool immediately, within 5 minutes of application, with a spatula to spread the sealant against the back-up material and joint surfaces.
• Squeeze the handle until the silicone reaches the nozzle end.
• Wet your finger with soapy water to smooth the sealant. Alternatively, use a sealant finishing tool, wetting it with soapy water to prevent sticking.
• Remove any excess sealant with a knife or spatula.
• Silicone sealants typically need 24-48 hours to fully cure. Protect from water exposure for at least 4 hours after application. Skin forms in about 10 minutes and is touch dry in approximately 30 minutes.
• Ensure the application area is well ventilated.