Clean area thoroughly with soap and water solution and wipe completely dry. Use alcohol pads to prep the tape application area and let dry. Wait until after Tailgate Seal is installed before applying very firm pressure (25lbs.), to secure adhesive bond. If necessary, Tailgate Seal can be removed and repositioned prior to applying very firm pressure (25lbs.). Pictures shown below are for the left sidewall and tailgate bottom gap.

NOTE: Large Tailgate Seal is NOT used for 2021 and older Tundra.

STEP 1: ATTACHING TO SIDEWALL USING STANDARD TAILGATE SEAL

Start 1” below truck bed floor and attach Standard seal to the rear corner edge of the left sidewall extension (FIG 1 & 1A).

Continue straight up, applying light pressure to adhesive and stop when 6” from the rubber stop. Keeping adhesive off surface, mark the seal where it will be flush to bottom of rubber stop. Continue up to rubber stop and apply light pressure to adhesive. Close tailgate and inspect from the inside to see if there is light through the sidewall. Open tailgate and make adjustments by removing seal and repositioning. Once seal is positioned apply very firm pressure (25lbs.) to secure adhesive bond. Duplicate for right sidewall.

STEP 2: ATTACHING TO TOP OF SIDEWALL USING STANDARD TAILGATE SEAL

Take roll of seal and remove approximately 10” of liner. Flush to the top of rubber stop (FIG 2). When nearing the top of sidewall extension, gradually begin rotating seal 90° degrees counter-clockwise, as you proceed up. When even with the top of bedrail, the top of seal should be facing forward and the taped side of seal should be flush with the sidewall of the bedrail (FIG 2B). Cut excess seal. Once seal is positioned apply very firm pressure (25lbs.), especially at rotation points, to secure adhesive bond. Duplicate for right sidewall.

STEP 3: ATTACHING TO TOP OF TAILGATE USING STANDARD TAILGATE SEAL

Cut a 5” piece of Standard seal. Remove liner and attach to the top of tailgate, bulb side facing outwards. (FIG 3). Apply light pressure to adhesive. Close tailgate. If you see light through the top of sidewall, make adjustments by removing seal and repositioning.

NOTE: For larger gaps substitute Standard seal with Large seal and apply either bulb side outwards or bulb side inwards. Once seal is positioned apply very firm pressure (25lbs.) to secure adhesive bond. Duplicate for right sidewall.

STEP 4: ATTACHING TO TAILGATE BOTTOM GAP USING STANDARD TAILGATE SEAL             Most often bulb side is up for Tundra (FIG 4).

To evaluate the best positioning for the tailgate gap, cut a 1” (2.5cm) test piece and align the top of bulb with the truck bed floor and attach. Stand to the side of truck and raise tailgate until bulb makes contact with tailgate.
NOTE: Compression and/or slight rolling of the bulb is okay, however, if the bulb rolls downwards too much as the tailgate is closing and you can see the tape, then seal has rolled too much. This can cause added stress on the adhesive and possible separation.

If you see that the bulb is rolling too much then invert 1” test piece so that bulb side is down. Raise tailgate and make sure no light is visible through the 1” piece. Adjust 1” piece higher or lower to seal out the light. After determining if the bulb should be up or down and how high or low, remove 1” piece and pick up one end of the continuous seal.

Start at either end, peel back a section of liner and flush end of Standard seal to seal on the sidewall. Attach in sections and apply light pressure to adhesive. Stop when 6" (15.3cm) from opposite end. Keeping adhesive off surface, cut seal where it will be flush with the seal on the opposite sidewall. Continue applying. Apply very firm pressure (25lbs.) to secure adhesive bond.

STEP 5
After Tailgate Seal with Taper Seal® is in place, apply very firm pressure (25lbs.) to secure the entire adhesive bond. Leave tailgate open for 30 minutes. If the air temperature will fall below 50°F (10°C) within the next 24 hours or, if applied to a surface other than paint, such as plastic or a spray on bed liner, then leave tailgate open for 24 hours.