Seal: Typical scenery of how famous traditional May festivities is celebrated in honor of Patron Saint San Isidro de Labrador. This activity is now a great tourist attraction for the town. Most significant feature of the Seal is the Carabao kneeling in front of San Isidro Parish Church. Riding carabao is a farmer with a salakot in his head and a plow on his shoulderis found at the center of the Seal. At the left is a small nipa hut with a full-grown mango tree at the back, a small rice field in front, and "mandala" on its side.

Shield: From the Provincial Seal of Bulacan where the Municipality is located.