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Question DetailsAsked on 9/14/2014

will concrete adhere to sundek patio covering currently on patio, I want a smooth finish on floor for easier clean

patio floor currently has a product called sundek (no longer in business, a lot like cool deck) Floor has a couple of small areas that need leveling with concrete and also has some cracks. Patio was extended (concrete slab) before applying sundek and it now has a separation which needs to be filled in. Can I resurface patio with concrete and do a stained smooth finish over the sundek or does the sundek have to be removed prior to resurfacing with concrete. If not, what product would adhere to the sundek.

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Certainly it can be overlaid with a flowable resurfacing grout, if in good structural shape - the question is how to bond to it. May take high pressure water cutting or shotblasting to provide a suitable surface, there may be a conding agent you can use successfully. Why not contact the manufacturer here for advise and on whether there is a local sundek applicator in your area - yes they are still in business, at least saw one job usin their product less than a month ago -

http://www.sundek.com/



However, bear in mind that all but initial surfical shrinkage cracks are likely to reflect through the new topcoat eventually, so you have to decide how much that would bother you. However, most contractors these days seem to accept cracking of their product as normal (which it should not be), so tearout and new concrete might not help you much. If I were you, for a patio especially, if the cracking is just small shrinkage or minor tension cracks without noticeable vertical offset across the crack, I would clean and epoxy fill/bond the cracks, then go with a flowable overlay grout, with whatever staining you want on it. Get the contractor to leave some of the stain with you for future use on crackfiller grout if needed down the road - preferably a full quart container full to promote longer shelf life.

Answered 6 years ago by LCD




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