how to use caulk and silicone like a pro - beginner to pro in seconds, by Billshowto on YouTube. 5 min 43 s.
- Video length
- 5 min 43 s
- Time to do it
- 45 minutes
- Difficulty
- Easy
- Steps
- 8
What you need
Steps
Scrape out the old silicone with a silicone remover or a utility knife held flat to the surface. Cut away every loose edge so the new bead has clean material to grip.
Wipe the joint with a cloth dampened with methylated spirits and let it dry completely. Silicone will not stick to dust, grease or damp surfaces.
Run masking tape along both sides of the joint, leaving a gap the width of the bead you want. Press the tape down firmly so sealant cannot creep underneath.
Cut the nozzle tip at a 45 degree angle, close to the tip for a thin bead and further back for a wide one. Match the hole to the gap you are filling.
Drop the tube into the caulking gun and pierce the inner seal with the spike on the gun or a long nail. Squeeze the trigger until sealant reaches the tip.
Push the bead along the joint at a steady speed, keeping the nozzle angled and the tip buried in the sealant. Pull the gun toward you rather than pushing away.
Smooth the bead straight away with a silicone profiling tool or a spatula dipped in soapy water. One firm pass gives a neater line than repeated wiping.
Peel the masking tape off while the sealant is still wet, pulling it back at an angle. Then leave the bead to cure for the time printed on the tube, usually 24 hours.
Tips and common mistakes
Keep a damp cloth and a bin bag nearby so you can wipe your fingers and drop waste without touching the fresh bead.
Cut the nozzle smaller than you think you need. You can always widen the hole, but you cannot make it smaller.
Run a continuous bead in one movement and stop only at corners, since stopping and starting leaves visible lumps.
Use paintable caulk on skirting and frames you plan to paint, and silicone only where the joint stays unpainted, because paint will not stick to silicone.
Questions
How long before I can get the bath or shower wet?
Most silicone sealants need about 24 hours to cure fully. Check the tube for the exact time and keep the area dry until then.
Why did my old silicone go mouldy and peel?
It was probably applied over a damp or dirty surface, or water got behind it. Remove it fully, dry the joint and use a mould resistant bathroom silicone.
Can I smooth silicone with my finger?
You can, but a profiling tool gives a more even finish. If you use a finger, wet it with soapy water first so the sealant does not stick.
This guide was drafted from the video's details and general task knowledge. It has not been checked against the full video. Check the video and relevant product instructions before following a procedure. Report a correction.
