|Permlastic is a polysulfide, condensation-cured, elastomeric impression material in three viscosities
alginate impression material cannot be used as muco-compressive material. This
material does not have consistency enough to apply pressure on mucosa.
Therefore, muco-compressive impressions cannot be taken by alginate.
The muco-compressive impression can only be taken by impression compound or heavy duty (putty) rubber base impression materials as they both have thick consistency.