Alaska Cold-Flex Tonneau Cover Seal Kit
Replacement rail and tailgate seals in the same cold-flex EPDM compound used on every Alaska cover. A stiff or cracked seal after a hard freeze-thaw season is the most common reason water starts getting into a covered bed — this kit fixes that without replacing the whole cover.
Shop This KitOverview
Even a cold-flex seal compound has a service life, and the freeze-thaw cycles that make winter hard on a truck bed are the same cycles that eventually wear a seal down. This kit gives you fresh rail and tailgate seals in the same cold-rated EPDM compound used across the entire Alaska lineup — not a generic all-weather seal that stiffens the first time it actually gets cold.
Replacing worn seals is the single most effective fix for a cover that used to seal tight through winter but has started letting water or drafts through, and it costs a fraction of what a full cover replacement would.
What’s Included
Cold-Flex Rail Seal
Full-length EPDM seal strip formulated to stay flexible well below freezing, sized for the rail channel on Alaska hard, low profile, and hinged covers.
Cold-Flex Tailgate Seal
A separate tailgate seal strip that seats against the tailgate edge — the point most exposed to road spray and slush.
Adhesive Backing
Both seals use a weatherproof adhesive backing for a clean, no-tools installation into the existing channel.
Install Guide
A printed installation guide walks through removing the old seal and seating the new one evenly, even in cold-weather working conditions.
Checking Compatibility
This seal kit is sized to fit the rail and tailgate seal channels used across the Alaska hard folding, soft roll-up, retractable, low profile, and hinged cover lineup. If you’re not sure which seal profile your cover uses, check the model name on your original packaging or email us your truck and cover style and we’ll confirm before you order.
How Installation Works
- Warm the area if it’s very cold. Adhesive backing bonds best above freezing — if it’s a hard-freeze day, warm the mounting surface briefly before applying.
- Remove the old seal. Peel the worn seal out of the channel, cleaning off any old adhesive residue.
- Clean the channel. Wipe the channel completely dry so the new adhesive bonds properly.
- Seat the new rail seal. Press the new seal into the channel starting from one end, working it in evenly.
- Install the tailgate seal and test. Apply the tailgate strip, then close the cover and check even compression along the full length.
Specifications
Why Replace Your Seals
- Restores a weathertight fit without replacing the whole cover
- Same cold-flex compound rated for the same sub-freezing performance as new
- Adhesive-backed strips install in under 30 minutes, no tools needed
- Sized to match the seal channel across the full Alaska lineup
- Far less expensive than a full cover replacement
Frequently Asked Questions
How do I know if my seals need replacing?
If the rubber feels stiff even at moderate temperatures, is visibly cracked, or you’ve noticed water or drafts getting into the bed after a freeze-thaw cycle, it’s time to replace the seals.
Will this fit my specific cover style?
This kit is sized for the standard rail and tailgate seal channel used across the Alaska hard folding, soft roll-up, retractable, low profile, and hinged covers. Email us your cover model if you want to confirm before ordering.
Do I need any tools to install it?
No. Both seals use an adhesive backing that presses directly into the existing channel — no drilling, cutting, or special tools required.
Can I install this outside in cold weather?
Yes, but the adhesive bonds best above freezing. On a very cold day, warm the mounting surface briefly with a heat gun or hair dryer before applying the seal for the best bond.
Stop Water Before It Gets In
A fresh cold-flex seal kit restores a weathertight fit in under 30 minutes.
Shop This Kit