The Precision Rear Window Weatherstrip Seal Kit (2-piece, WKT 4266 SC) provides a precise, durable sealing solution for rear glass openings. Designed to replace worn or hardened seals, this two-piece kit restores proper glass alignment, prevents water intrusion and wind noise, and protects interior trim from vibration and damage. Made from long-lasting EPDM rubber with a factory-style profile, the seals deliver reliable fit and improved appearance while being straightforward to install for most DIYers or professional restorers.
Features:
- 2-piece rear window weatherstrip kit (WKT 4266 SC) replaces worn or cracked seals.
- Made from durable EPDM rubber for long-term resistance to ozone, UV and temperature changes.
- Seals out water, dust and wind noise while cushioning the rear glass to reduce vibration.
- Factory-style profile for accurate fit and restored appearance.
- No special trimming required in most applications; designed for straightforward installation.
- Ideal for restoration projects or routine maintenance to prevent interior water damage.
Installation / Application:
- Difficulty: 2/5
- Estimated time: 30-90 minutes
Instructions:
- Park vehicle on level ground and work in a dry, shaded area. Remove rear deck or interior trim as needed to access the seal area.
- Carefully pry out and remove the old weatherstrip pieces using a trim tool or flat screwdriver. Cut away any stubborn remnants with a utility knife.
- Thoroughly clean the sealing channel and mating surfaces with isopropyl alcohol to remove adhesive, dirt, and oils. Allow to dry.
- Test-fit both new seal pieces (dry) to confirm orientation and fit. Trim excess only if absolutely necessary.
- Apply a thin, even bead of weatherstrip adhesive to the channel or the seal flange per adhesive manufacturer instructions.
- Press the new weatherstrip into the channel, starting at one end and working around the opening. Use a rubber mallet or block to seat the seal evenly without overstretching.
- Secure the seal in position with masking tape or clamps where needed and align the glass to ensure proper fit.
- Allow adhesive to cure per product directions (typically 1–24 hours) before reassembling interior trim and testing for leaks.
- Inspect the installed seal for gaps or pinched areas and make small adjustments as needed.
About Precision Replacement Parts
Since 1986 Precision Replacement Parts has been a trusted name in the Automotive Glass Industry.
Our knowledge and experience in manufacturing millions of extruded and molded EPDM Rubber, PVC and HDPE based plastics, and various stamped and extruded metal products for the classic and late model industries has allowed Precision to expand our services into multiple product markets.
Along with our own USA based production facility, Precision also partners with 25 different manufactures worldwide with a reputation as a global leader supplying OEM and replacement products to a number of different industries. Our partnerships along with our own in-house manufacturing and fabrication capability gives Precision a unique position in helping to meet the expanding needs of customers everywhere, providing them with a sustained competitive advantage.
Vehicle Fitment:
The Vehicle Fitment Guide is to be used as a general reference. The data has been provided by our suppliers and manufacturers and may contain errors or incorrect data. Always refer to a professional to verify correct fitment for your vehicle.
| Make |
Model |
Years |
| Chevrolet |
3100 |
1959 |
| Chevrolet |
3B |
1959 |
| Chevrolet |
3C |
1959 |
| Chevrolet |
3D |
1959 |
| Chevrolet |
3E |
1959 |
| Chevrolet |
3F |
1959 |
| Chevrolet |
3G |
1959 |
| Chevrolet |
BG |
1943 |
| Chevrolet |
BJ |
1942 |
| Chevrolet |
BK |
1942 - 1946 |
| Chevrolet |
BL |
1942 - 1945 |
| Chevrolet |
BM |
1942 - 1945 |
| Chevrolet |
BN |
1942 - 1945 |
| Chevrolet |
C10 Pickup |
1960 - 1966 |
| Chevrolet |
C20 Pickup |
1960 - 1966 |
| Chevrolet |
C30 Pickup |
1960 - 1966 |
| Chevrolet |
C40 |
1960 - 1962 |
| Chevrolet |
C50 |
1960 - 1966 |
| Chevrolet |
CK |
1946 |
| Chevrolet |
DP |
1946 |
| Chevrolet |
DR |
1946 |
| Chevrolet |
DS |
1946 |
| Chevrolet |
K10 Pickup |
1960 - 1966 |
| Chevrolet |
K20 Pickup |
1960 - 1966 |
| Chevrolet |
Truck |
1942 - 1958 |
| GMC |
1000 Series |
1960 - 1965 |
| GMC |
1000 |
1966 |
| GMC |
1500 Series |
1960 - 1965 |
| GMC |
1500 |
1966 |
| GMC |
2500 Series |
1960 - 1965 |
| GMC |
2500 |
1966 |
| GMC |
K1000 Pickup |
1966 |
| GMC |
K1000 |
1966 |
| GMC |
K15/K1500 Pickup |
1966 |
| GMC |
Truck |
1945 - 1959 |
