Thinset "Slake"... What exactly is happening there??? [Archive] - Ceramic Tile Advice Forums - John Bridge Ceramic Tile


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sean riha
11-05-2004, 01:06 PM
We all know about letting our thinsets slake for 10min after we mix them, but what the heck is the reason for this? I'm pretty sure the explantion is chemical/chemistry related. What is "slakeing"?

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11-05-2004, 03:40 PM
To “slake” the mortar came from the past when it was necessary to slake, or let rest with water, the lime that was used in the mortar. The Romans believed that the lime should slake for 3 days. Today’s pre-blended mortars do not require this extensive slaking. It is still necessary for a cement based thin set mortar to slake to dissolve the additives that are added to improve performance and to initiate the hydration process. The thin set mortar is mixed after the slaking time to improve the uniformity of the mix and assure maximum strength is developed.

11-05-2004, 04:07 PM
Ever make pancake batter?

The texture is much better if you let it rest for about 5 minutes. Makes a smoother batter. Same thing with thinset, the moisture is being absorbed by the dry ingredients better over time.

Jeez Mark, the Romans had to wait three days to set tile? Man that would really make me not want to mix up multiple batches.