Hi guys, did a job on Tuesday and it appears that the water based deck sealant started to peel in places after I had washed the house, the customer is convinced it is not my fault, I offered to pay for the deck to be resealed they wouldn’t hear of it, the husband had already sanded back the parts and was reapplying sealant.
It only happened on certain sections of the deck that was in the prolonged sun exposure, mix was not directly sprayed onto the deck, mix was only 0.7-0.8% applied with a 12v pump as my DS broke last week and the new one is yet to arrive. So in this instance I know the precise ratio of the mix, dwell time was 5-10 mins and all rinsed off with one of the spray tips from the Jrod with a 4gal 4k machine.
I only found out when I arrived today to do a shower door restoration, and they informed me, they think it was because they used a different brand of sealant on the front deck where the water based sealant was , where the rear deck which had oil based sealant was not affected at all. The paint store said it would come off with pressure, however I only used soft washing tips.
I guess I am wondering if anyone else has experienced anything like this, I couldn’t find anything specific with search, what would have caused this:
Oxidization from the sun?
Did the mix strip it?
Pressure? ( didn’t use any)
Home owner applied old sealant incorrectly?
Hopefully someone will chime in and offer their expertise as I would prefer for this not be a repeatable occurrence, although it has never happened before.