Gear Aid Tent Sure
The water-based urethane coating used to re-waterproof a stripped rainfly or floor. One bottle covers a typical 2-person tent.
Bring an old tent back to life
We bought a 1990s Sierra Designs Clip Flashlight CD used. The poles were perfect, the fabric was sound, and the waterproof coating had turned into a sticky, sour-smelling mess. Here is why that happens, how to tell a restorable tent from a dead one, and the five-step process that makes it waterproof again.
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Gear Aid Seam Grip WP
The seam sealer applied after old seam tape comes off. Check whether your fabric is PU- or silicone-coated before choosing a sealer.
Nikwax Tech Wash
A residue-free wash for cleaning technical fabrics before recoating. Regular detergent can leave residue that interferes with new coatings.
Sierra Designs Clip Flashlight (1990s CD)
The tent restored in this guide: a sub-4 lb classic with Swift Clips and Easton/DAC aluminum poles. Used listings vary widely in coating condition, so read the seller's description closely.
Sierra Designs Meteor Light CD
A tougher, slightly heavier sibling of the Clip Flashlight with the same clip architecture and quality poles. A common second vintage restore project.
Eureka! Timberline 2
The classic A-frame that has housed Scout troops since the 1970s. Simple geometry, cheap used examples and easy fabric access make it a forgiving first restore.
Prices and availability are set by the retailer. Product references reviewed 2026-10-29. These are researched examples, not hands-on test winners.
How to read this guide: the tent in this article is one we bought used and worked on ourselves. The chemistry and the process apply to almost any coated-nylon tent from the 1980s to the 2000s. Retailer searches below help you compare the exact supplies and donor tents before buying.
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The tent we bought: a 1990s Clip Flashlight CD
The Sierra Designs Clip Flashlight is one of the most important backpacking tents ever made. When it introduced the patented Swift Clip in the early 1980s, it was the first major two-person, double-wall tent under four pounds. It won Backpacker Magazine's Editors' Choice award in 2000, after nearly two decades in production, and it retailed for about $199 at the end of the 1990s. Through the 1990s thru-hiking boom on the Appalachian and Pacific Crest Trails, it was arguably the most common serious shelter in North America.
That also means there are thousands of them sitting in closets and garages right now, and they show up on eBay constantly. Ours is the 1995–1999 "CD" variant. You can identify one by four markers:
- Cream or tan upper canopy with a deep navy bathtub floor (the late-90s colorway)
- A large square woven Sierra Designs mountain patch at the base of the zipper
- A single front D-door with sage-green no-see-um mesh trim
- Black molded Swift Clips that snap the canopy directly onto bare poles, with no pole sleeves
| Clip Flashlight CD (circa 1998) | Specification |
|---|---|
| Capacity / design | 2-person, non-freestanding modified hoop |
| Minimum trail weight | 3 lbs 6 oz – 3 lbs 10 oz (1.53–1.64 kg) |
| Peak interior height | 42–43 in at the head hoop |
| Floor area | 30–32 sq ft, tapered footprint |
| Floor / fly coating | PU-coated nylon (3,000 mm floor / 1,500 mm fly) |
| Retail price (1998) | ~$199 (roughly $370 in today's money) |
The engineering has aged well. The Easton and DAC aluminum poles from this era are aerospace-grade extrusions that tolerate decades of flexing, and the Swift Clip design keeps an air gap between canopy and fly that modern tents still copy. What has not aged well is the polyurethane coating — which is exactly the part you can fix.
Why old tents get sticky: "sticky tent syndrome"
Open a 25-year-old tent that has been stored in a damp garage and you will usually find the same thing: a sour-milk smell, a fly that feels tacky and gummy, and white flakes of coating peeling off the fabric. Owners call it sticky tent syndrome. Chemists call it hydrolysis.
Atmospheric moisture slowly breaks the long polymer chains in the liquid polyurethane coating down into their component monomers. The coating reverts toward a liquid state, which is why it smells and why it gums up. Heat and humidity drive the reaction, so a tent stored wet in a hot attic fails years faster than the same tent stored dry. The important part: the nylon fabric underneath is usually fine. It is the coating that died, and coatings can be stripped and replaced.
Is a restore worth it? Check before you buy
A restore is worth it when the expensive, irreplaceable parts are healthy and only the consumable coating has failed. Before buying a used tent to refurbish, check four things:
- Poles: aluminum (Easton or DAC) with straight sections and intact shock cord. Bent aluminum can sometimes be sleeved; shattered or heavily corroded poles end the project.
- Fabric: pinch and pull the canopy. Sound ripstop nylon resists; sun-rotted fabric tears like tissue paper. UV damage is not fixable.
- Zippers: run every slider end to end. Zippers can be replaced, but it is real sewing work.
- The coating itself: sticky, smelly and flaking is good news — that is the fixable failure. Mildew staining deep in the weave is worse.
When those four checks pass, the math is strong: a bottle of recoating sealant, a tube of seam sealer and a wash cost a fraction of a comparable new tent, and you end up with a shelter whose pole set and patterning were built to a standard that budget tents still do not match.
The 5-step restoration
Work in a ventilated space, wear gloves, and plan for a weekend: an afternoon of scrubbing, then 24–48 hours of curing. This process covers the rainfly and the bathtub floor, which carry the waterproof coatings.
Step 01 / Strip the failed coating
Chemical delamination
- Submerge the fly and floor in a washbasin of warm water with unscented liquid soap and about a quarter cup of household ammonia (or 90% isopropyl alcohol)
- The ammonia forces the decomposed PU to soften into a gelatinous film — ventilate the room
Step 02 / Get to bare nylon
Mechanical stripping
- Scrub with a non-scratch nylon sponge; use isopropyl alcohol directly on stubborn patches
- Goal: 100% of the flaking, smelly polyurethane gone, down to clean woven nylon
Step 03 / Deal with the seams
Seam tape removal and prep
- Peel away the old dry-rotted white seam tape
- Wipe the stitching lines with isopropyl alcohol — new seam sealer will not adhere to peeling vintage tape
Step 04 / Re-waterproof
Recoat with water-based PU
- Apply a thin, uniform coat of water-based polyurethane tent sealant (we used Gear Aid Tent Sure) with a foam brush
- Hang in a dust-free space with airflow and let it cure 24–48 hours
Step 05 / Kill the tack
Desiccant powder dusting
- Dust the cured coating lightly with unscented talcum or baby powder
- This removes microscopic surface tackiness so the fabric does not stick to itself when rolled in storage
After the coating cures, seal the bare stitching lines with a seam sealer matched to your fabric (PU-coated fabric takes a urethane sealer such as Seam Grip WP; silicone-coated fabric needs a silicone sealer). Then pitch the tent in the yard before the first trip: a restored coating that cured evenly looks slightly satin, not glossy, and water should bead on it.
Other old tents worth restoring
The same process works on almost any coated-nylon tent with quality bones. Three that show up used all the time:
Vintage pick / Same family
Sierra Designs Meteor Light CD
- The tougher sibling of the Clip Flashlight: same Swift Clip architecture, same Easton/DAC poles, a little heavier
- A natural second project once you have the process down
Vintage pick / The forgiving first project
Eureka! Timberline 2
- The classic A-frame that has housed Scout troops since the 1970s
- Simple geometry and big flat panels make stripping and recoating easy
Also worth a look
Older North Face and REI models
- 1990s–2000s geodesics (VE 24/VE 25 era) and early REI Half Domes used good poles and coated ripstop
- Apply the same four-point check: poles, fabric, zippers, coating
Skip the cheap fiberglass-pole dome tents. Fiberglass splinters, replacement pole sets cost more than the tent is worth, and the fabric was usually thin to begin with. If you would rather buy new than restore, our 4-season tent guide and the shelter category cover what is worth paying for today.
FAQ
Can a sticky tent rainfly be saved? +
Usually, yes. The stickiness is the factory polyurethane coating breaking down, not the fabric failing. Strip the old coating with an ammonia or alcohol soak, recoat with a water-based tent sealant and reseal the seams.
How do I know if my tent has hydrolysis? +
Three signs: a sour-milk or vomit-like smell, a tacky or gummy feel on the coated side of the fly or floor, and white flakes peeling off the fabric. Damp storage accelerates it.
Is restoring an old tent worth it? +
It is worth it when the poles are straight aluminum, the fabric is not torn or sun-rotted, and only the coating has failed. Supplies cost far less than a comparable new tent. Walk away from cracked poles, delaminated fabric weave or heavy mildew.
How long does a tent restoration take? +
Plan a weekend: a few hours of soaking and scrubbing on day one, then 24 to 48 hours of curing time for the new coating before the tent can be packed away.
Which old tents are worth restoring? +
Tents with quality aluminum poles (Easton or DAC) and coated ripstop nylon: the Sierra Designs Clip Flashlight and Meteor Light, the Eureka Timberline, and older North Face and REI models. Cheap fiberglass-pole dome tents are rarely worth the effort.
Do I need to reseal the seams after recoating? +
Yes. Old seam tape usually peels away with the failed coating, and new seam sealer will not stick to flaky tape. Remove it, clean the stitching lines with alcohol, then apply a seam sealer matched to your fabric coating.
Affiliate links on this page open Amazon or eBay search results and earn us a commission on qualifying purchases. Supplies and donor tents are named so you can compare condition, seller and price before buying. Prices change often.
Good gear lasts. Great gear gets restored.
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