Next Level Siloxane Sour

A siloxane is a functional group in organosilicon chemistry with the Si–O–Si linkage. The parent siloxanes include the oligomeric and polymeric hydrides ... Whatever that means I don't know. All I know is when asked what needed to use to seal the brick wall in brewhouse and were told Siloxane PD. There may be other things people use but most people just use Siloxane PD so that's what used. Two row and white wheat were mashed and sparged cold and allowed to spontaneously sour overnight in brew kettle. It's very refreshing and probably would seal bricks as well.