An OEM-style windshield weatherstrip with a built-in trim groove designed to accept steel windshield trim and create a watertight, vibration-damping seal. Engineered from durable, UV- and ozone-resistant EPDM rubber, this WCR 4235 S GM profile restores proper fit and finish while preventing leaks, wind noise, and trim rattle. Ideal for restoration projects and replacement applications on GM vehicles that utilize the WCR 4235 S windshield seal profile, it provides a reliable, long-lasting solution that installs with common trim tools.
Features:
- Fits GM vehicles that use the WCR 4235 S windshield weatherstrip profile — commonly used on various classic and later-model GM cars and trucks.
- Manufactured from durable EPDM rubber for UV, ozone, and temperature resistance.
- Integrated trim groove accepts steel windshield trim for a secure, OEM appearance.
- Creates a watertight seal to prevent leaks and reduce wind noise and vibration.
- Pre-formed profile for easier installation; can be trimmed for exact fit where necessary.
- Ideal for restoration and maintenance — replaces worn, cracked, or flattened original seals to restore fit and finish.
Installation / Application:
- Difficulty: 2/5
- Estimated time: 30-60 minutes
Instructions:
- Carefully remove the exterior steel trim using a plastic trim tool or protected flat screwdriver to avoid damage.
- Pull out the old weatherstrip and clean the windshield channel and surrounding area with isopropyl alcohol to remove old adhesive, dirt, and residue.
- Test-fit the new weatherstrip along the windshield to verify orientation and length. Trim excess material if necessary, keeping the cut square for best sealing.
- Lightly wet the sealing lip and channel with soapy water to aid installation and sliding into place.
- Press the new weatherstrip into the windshield channel, starting from one corner and working around the perimeter. Make sure the bead seats fully into the channel.
- Reinstall the steel trim into the seal’s trim groove, tapping gently with a rubber mallet as needed to engage the trim without deforming it.
- Inspect the seal for uniform seating and ensure there are no gaps or pinched areas; adjust as needed.
- Allow any residual moisture to dry. If adhesive is desired for a permanent bond, apply a suitable urethane or weatherstrip adhesive as directed by the adhesive manufacturer before final seating of the seal and trim.
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 |
Truck |
1947 - 1953 |
| GMC |
Truck |
1947 - 1950 |
