No,...

...not all ERGELIT mortars may be accelerated. All mortars can be accelerated, with the exception of ERGELIT-KS2BL. ERGELIT-KS2BL must not be accelerated as its composition differs greatly from all other mortars. The addition of accelerators that are suitable for other ERGELIT mortars would cause negative reactions with ERGELIT-KS2BL.

However, all other ERGELIT mortars may be accelerated or retarded. However, it should be noted that the additions should not exceed 5-10 %, as otherwise the reaction of the mortar is accelerated too much, which can lead to cracking.