The Precision Glass Weatherstrip Lockstrip WLS 1135 C is a metal lockstrip engineered to secure automotive window glass inside the rubber weatherstrip channel. It creates a firm, consistent hold that reduces wind noise, prevents water intrusion, and stops glass from shifting or rattling. Designed for restoration and replacement use, this corrosion-resistant lockstrip provides dependable retention and a professional finish while remaining straightforward to install for both DIYers and technicians. Verify specific year/make/model fitment before purchase.
Features:
- Check vehicle fitment for year, make and model before ordering — compatibility varies by application.
- Corrosion-resistant metal core for long-lasting retention and reliability.
- Secures glass within the weatherstrip channel to reduce vibration, wind noise, and leaks.
- Ideal for restoration projects or replacing worn/flattened original lockstrips.
- Designed for relatively simple installation with common hand tools; no special adhesives required in most applications.
Installation / Application:
- Difficulty: 2/5
- Estimated time: 30–60 minutes per window
Instructions:
- Park the vehicle on a flat surface and lower the window glass slightly to access the weatherstrip area (follow vehicle-specific procedures).
- Remove the door panel or access cover as needed to expose the glass and weatherstrip channel per vehicle instructions.
- Carefully remove the old lockstrip: peel back the rubber weatherstrip enough to expose the metal core and use pliers or a screwdriver to slide or pry the old strip out. Cut into sections if necessary to ease removal.
- Clean the glass edge and weatherstrip channel thoroughly with solvent to remove old adhesive, dirt, and debris. Allow to dry.
- Lubricate the weatherstrip channel and the edge of the glass with soapy water or silicone spray to ease installation.
- Align the new WLS 1135 C lockstrip with the glass edge and begin inserting it into the channel, working in short sections and pressing it fully into place. Use pliers for firm grip and a soft-faced hammer to seat the strip if required.
- Trim any excess lockstrip length with a utility knife so edges sit flush with the window and door frame.
- Cycle the window slowly to ensure smooth operation and correct alignment. Reinstall door panel or access covers.
- Test for proper sealing and adjust as needed. Allow any lubricant to dry and re-check after a short road test for rattles or leaks.
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 |
C10 Pickup |
1973 - 1974 |
| Chevrolet |
C10 |
1975 - 1986 |
| Chevrolet |
C20 Pickup |
1973 - 1974 |
| Chevrolet |
C20 |
1975 - 1986 |
| Chevrolet |
C30 Pickup |
1973 - 1974 |
| Chevrolet |
C30 |
1975 - 1986 |
| Chevrolet |
C50 |
1973 - 1990 |
| Chevrolet |
K10 Pickup |
1973 - 1974 |
| Chevrolet |
K10 |
1975 - 1986 |
| Chevrolet |
K20 Pickup |
1973 - 1974 |
| Chevrolet |
K20 |
1975 - 1986 |
| Chevrolet |
K30 Pickup |
1973 - 1974 |
| Chevrolet |
K30 |
1977 - 1986 |
| Chevrolet |
R10 |
1987 |
| Chevrolet |
R20 |
1987 - 1988 |
| Chevrolet |
R2500 |
1989 |
| Chevrolet |
R30 |
1987 - 1988 |
| Chevrolet |
R3500 |
1989 - 1991 |
| Chevrolet |
V10 |
1987 |
| Chevrolet |
V20 |
1987 |
| Chevrolet |
V30 |
1987 - 1988 |
| Chevrolet |
V3500 |
1989 - 1991 |
| GMC |
C15/C1500 Pickup |
1973 - 1974 |
| GMC |
C1500 |
1979 - 1986 |
| GMC |
C15 |
1975 - 1978 |
| GMC |
C25/C2500 Pickup |
1973 - 1974 |
| GMC |
C2500 |
1979 - 1986 |
| GMC |
C25 |
1975 - 1978 |
| GMC |
C35/C3500 Pickup |
1973 - 1974 |
| GMC |
C3500 |
1979 - 1986 |
| GMC |
C35 |
1975 - 1978 |
| GMC |
C5000 |
1979 - 1990 |
| GMC |
K15/K1500 Pickup |
1973 - 1974 |
| GMC |
K1500 |
1979 - 1986 |
| GMC |
K15 |
1975 - 1978 |
| GMC |
K25/K2500 Pickup |
1973 - 1974 |
| GMC |
K2500 |
1979 - 1986 |
| GMC |
K25 |
1975 - 1978 |
| GMC |
K35/K3500 Pickup |
1973 - 1974 |
| GMC |
K3500 |
1979 - 1986 |
| GMC |
K35 |
1977 - 1978 |
| GMC |
R1500 |
1987 |
| GMC |
R2500 |
1987 - 1989 |
| GMC |
R3500 |
1987 - 1991 |
| GMC |
V1500 |
1987 |
| GMC |
V2500 |
1987 |
| GMC |
V3500 |
1987 - 1991 |
