Pentatard AT is a set retarder in powder form based on natural tartaric acid.
It is very effective in the mixtures based on cement and/or gypsum with hydrated lime.
It delays the setting time of gypsum in proportion to the dosage, even from the very first small additions.
In gypsum-based mixtures, it develops an interval between the beginning and the ending of the setting which is much more controllable than the one developed by the synthetic tartaric acid.
It stands thermal action up to 200°C without undergoing any deep alteration so that efficaciousness is not affected.