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Home / DOT Specifications / Pennsylvania / Publication 408 — Specifications / 472
Flexible Pavements (400-499)

472ASPHALT FOG SEAL FOR ASPHALT SEAL COATS

PA · 2026 Standard SpecificationsBook pages 313–317View official source ↗

450.1 450.3(e)

450.1DESCRIPTION —This work is preparing and patching of potholes , abrupt depressions, and deteriorated

edges of pavement, and repatching temporarily patched potholes using asphalt plant mix material placed manually or with mechanical spreading and finishing equipment.

450.2M ATERIAL —

(a)Superpave Asphalt Mixture Design .

• Asphalt Wearing Course. Section 413 .2

(b)Superpave Asphalt Mixture Design .

• Asphalt Binder Course. Section 4 13.2

(c)Asphalt Tack Coat. Section 460.2

450.3CONSTRUCTION —As specified in Section 41 3.3 and as follows :

(d)Manual Asphalt Patching, Type A. For potholes and abrupt depressions 3 inches and less in

depth, perform the work manually with asphalt wearing course as indicated.

1.Preparation. Cut out and patch the outlined area as marked by the Representative. Ensure

each patch has a minimum area of 1 square foot. Excavate outlined area to sound, stable material. The use of a milling or planing machine will be allowed . Cut all edges vertically. After removal of the debris, thoroughly clean the area to be patched and the surrounding pavement of all loose and foreign material. Thoroughly dry all surfaces of the area to be patched. Apply tack coat to the bottom and vertical surfaces of the area to be patched as specified in

2.Patching. After the tack coat is cured, place asphalt wearing course. Compact with a steel

wheeled roller or other approved compaction equipment . Ensure that, after compaction, the surface of the patch conforms to the grade of the surrounding pavement. Fill all excavated areas before the close of each workday. Potholes which extend into the shoulder do not require excavation beyond the edge of roadway. If the existing shoulder has an asphalt base, fill the shoulder portion of the pothole with asphalt and compact in the same manner as the roadway. For other shoulder types, fill the pothole with suitable material excavated from the roadway pothole and compact . Seal edges with emulsified asphalt, Class TACK or NTT , the PG -Binder used in the pavement course or PG 64S -22.

(e)Manual Asphalt Patching, Type B. For potholes and abrupt depressions over 3 inches in

depth, perform the work manually with asphalt wearing course and asphalt binder course as indicated.

1.Preparation . Section 450.3(d)1.
2.Patching. After the tack coat is cured, place asphalt binder course in lifts not to exceed

3 inches in uncompacted depth. After leveling each lift, compact with an approved mechanical tamper. Place asphalt wearing course material in the topmost 1 1/2 inches of the patch. Ensure that, after compaction, the surface of the patch conforms to the grade of the surrounding pavement. Com

Source: Pennsylvania Department of Transportation Specifications, 2026 Edition. Pages 313–317 of 1,522.
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