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Should You Remove Old Sealant Or Can You Add More On Top Of It  

Updated 10/04/2021 | Published 10/03/2021

Question:

Just took a look at the roof on a 12 year old cargo trailer I recently purchased. While I dont see any evidence of leaking, the sealant on the roof seems looks rough and shows quite a bit of cracking. Is it ok to just add more sealant on top of the old stuff? Or do I need to get the old stuff off 1st?

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Expert Reply:

It's always best to remove the old sealant first and then clean the area with soap and water to ensure a secure grip for the LaSalle Bristol XTRM Universal Self-Leveling Sealant # 34427034145-1. The old sealant could deteriorate and fall off taking the new sealant with it.

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Kevin C

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