Asked by: Kenji Kopercza
asked in category: General Last Updated: 28th March, 2020

Can you put new sealant over old?

Never apply new silicone sealant over old sealant as, in most cases, the old sealant would have fallen away or split meaning that, no matter how much new sealant you apply, the leak will persist. Not to mention, applying new sealant over old will look incredibly messy and unappealing.

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Also know, can you put new silicone sealant over old?

Can I apply new silicone atop, or alongside old silicone caulk? It is recommended that any old silicone is removed. While new, freshly applied silicone can be applied & will bond to old silicone – the bond isn't as strong as if it were applied to a clean surface.

Similarly, can I put sealant on top of sealant? Simply apply on top of existing sealant – no need to remove old sealant. Smooth application – This bath, sink and kitchen sealant can be applied very easily and will renew moulding, yellowing or cracking of a seal.

should you remove old sealant before applying new?

If you then need to apply new silicone sealant to area once you have removed the old, make sure you get it all off before attempting to apply the new. Applying new sealant over the top of old, leaking sealant never works as the adhesion of the existing sealant to the bath or shower, and tiles, is what counts.

Can you build up layers of silicone sealant?

Craig also recommends applying two layers of silicone. Then run the silicone completely around the bath or shower tray. Once it's applied, moisten your finger with a silicon wipe and run your finger over the sealant to create a smooth line.

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