You've just picked up a new swag and you're ready to get out there. Before you roll it out at camp for the first time, there's one job worth doing at home: seasoning the canvas.
Most new swag owners skip this step. Some don't know it exists. And the first time rain rolls in overnight, they find out the hard way. Seasoning your swag before its first trip is the single most effective thing you can do to protect it long-term, and the process itself takes less than an afternoon of actual work spread across a day or two of drying time.
This guide covers how to season a swag properly, how to seal the seams for complete waterproofing, and what ongoing swag maintenance looks like to keep the canvas performing for years.
Why Seasoning a Swag Actually Works
Canvas is woven from natural fibres, and like any woven fabric, it comes off the loom with tiny gaps between the threads. In dry conditions those gaps are invisible and harmless. In wet weather, water finds them quickly.
When you wet canvas thoroughly and allow it to dry, the fibres absorb moisture and swell. As they expand, they push against each other and close those gaps. Run the process two or three times and the weave becomes genuinely tight. Water that hits the surface beads and runs off rather than soaking through.
This is what seasoning actually does. It's not a coating or a chemical treatment. It's using the natural properties of canvas to make it waterproof.
Without seasoning, a new swag in heavy rain will let moisture through at the seams and stitching first, then gradually through the canvas body. A seasoned swag handles the same conditions cleanly. The difference on a wet night in the bush is significant.
What You Need Before You Start
The process is straightforward and you don't need any special equipment to get it done.
To season the canvas:
- A garden hose with reasonable pressure
- A sunny day with enough warmth to dry canvas thoroughly
- Two to three hours each session, across two to three sessions
For seam sealing (recommended):
- A canvas-compatible seam sealer, applied after the first seasoning session
- A small brush or sponge applicator
- A dry day to allow the sealant to cure properly before the next wetting
Most swags come with a PVC floor or a bucket floor that doesn't require seasoning, but it's worth checking the base for any stitched joins or attachment points that might benefit from seam sealer regardless.
How to Season Your Swag: Step by Step
Pick a clear day with sun. Avoid doing this in direct midday heat in summer, as canvas drying too fast between wettings can contract unevenly. A warm morning or late afternoon works well.
Step 1: Open your swag fully
Set the swag up exactly as you would at camp, poles extended, zips closed, fly tensioned. You want the canvas under the same tension it would be in use so the fibres swell in the right configuration.
Step 2: Wet the canvas thoroughly
Using a garden hose, soak the entire canvas from top to bottom, paying extra attention to the seams and stitching. These are the most vulnerable points on any swag because needle holes from stitching sit between the fibres rather than through them. Give seams a long, direct soak.
Don't miss the corners, the zip edges, or any storm flaps. Every stitched join needs thorough wetting.
Step 3: Allow it to dry completely
Leave the swag standing and let it dry fully in the sun. Don't roll it or pack it while damp. Canvas stored before it's completely dry will mildew, and mildew in canvas is difficult to remove and permanently weakens the material. Depending on conditions this can take several hours.
Step 4: Repeat
Wet the swag again, same process, paying extra attention to any spots that looked like they were still absorbing rather than beading. Allow it to dry completely again.
Two to three full wet-and-dry cycles is the standard. After the final dry, water should visibly bead on the canvas surface. If it's still soaking in in patches, run another cycle on those areas.
Seam Sealing: The Step Most Guides Leave Out
Wetting and drying the canvas body handles the weave. Seams are a different problem.
Where canvas panels are stitched together, needle holes create a row of tiny puncture points that the swelling fibres can't fully close. In moderate rain this often doesn't matter. In sustained heavy rain, or if your swag gets caught in a proper downpour overnight, those seams are where moisture gets in first.
Applying a seam sealer after the first seasoning session fills those needle holes directly. Apply it to the inside of every seam, working it in with a brush and allowing it to dry completely before the next wetting cycle.
Storm flaps, if your swag has them, cover the main zip and prevent water tracking down into the bedding. Check that the flap sits flat and that the stitching along its edges is sealed.
A seam-sealed and seasoned swag is as waterproof as a canvas swag can be. It will handle heavy rain, condensation, and damp ground comfortably.
Seasoning a Swag With a PVC Floor
Most modern swags use a PVC bucket floor rather than stitched canvas for the base. PVC doesn't need seasoning and won't absorb moisture. What does need attention is the join between the PVC floor and the canvas walls.
This join is almost always stitched, which means it has the same needle-hole vulnerability as the rest of the seams. Run seam sealer along the interior of that join before the first trip. It takes a few minutes and it's the most likely point for water to enter if the swag sits on saturated ground.
The canvas walls above the PVC floor should be seasoned normally.
How Often Does a Swag Need Re-Seasoning?
A well-seasoned swag doesn't need re-doing every year. Canvas that's been properly seasoned and stored correctly holds its water resistance across multiple trips and seasons.
The signs that it's time to re-season:
- Water soaking in rather than beading on the surface after exposure to rain
- Damp patches on the inside of the canvas after a wet night
- The swag has been in storage for an extended period without use
Re-seasoning is the same process as the initial seasoning. Two wet-and-dry cycles is usually enough to restore water resistance on a swag that just needs a refresh. If the canvas has visible weathering or significant UV fading, it may need an additional cycle and a fresh application of seam sealer at the joins.
It's also worth re-seasoning after any extended period in storage, particularly if the swag has been packed away in a shed through a hot Australian summer. Heat and UV degrade canvas slowly, and a swag that's been sitting unused for twelve months or more will benefit from a refresh before it goes back into service. Better to find out how it performs in the backyard than to discover it in the middle of a rainy night at camp.
Common Mistakes When Seasoning a Swag
A few things trip people up the first time through the process.
- Not wetting it evenly. The most common issue is a quick spray over the top and calling it done. Every panel, seam, and stitched join needs a direct, thorough soak. Areas that only get a light mist won't season properly, and those spots will be the first to let moisture through in wet weather.
- Rolling it up before it's fully dry. Canvas feels dry on the outside long before the fibres have fully dried through. Rolling a swag that's still holding internal moisture is how mildew starts. If in doubt, leave it standing for another hour.
- Only running one cycle. A single wet-and-dry cycle closes some of the gaps in the weave but rarely all of them. Two cycles is the minimum; three is better for heavier canvas. The improvement between cycle one and cycle three is noticeable when you run water over the surface and watch how it behaves.
- Skipping the seams. Wetting the canvas body and forgetting the seams is like waterproofing a jacket and leaving the zip untreated. The seams are the weak point. Give them extra attention during the wetting process and follow up with seam sealer on the interior joins.
- Seasoning in the wrong conditions. A hot, windy day dries canvas very fast, sometimes too fast for the fibres to fully swell. Overcast and mild is better than scorching sun for the actual wetting process. Avoid doing it in cold weather where the canvas won't dry fully before evening.
Seasoning is a one-time job per season at most. What keeps a swag in good condition over years is the routine between trips.
After every camping trip:
Always air your swag completely before rolling it up. This is the single most important maintenance habit. Canvas that goes into storage damp will develop mildew within days. Once mildew is established in canvas fibres it permanently weakens the material and is nearly impossible to remove completely.
Set the swag up or hang it somewhere with airflow, even briefly, before it gets rolled and packed away.
Storage:
Keep the swag in a dry place away from direct sunlight. UV exposure over time degrades canvas and reduces water resistance. A breathable cotton bag, a shelf in a shed, or a cool cupboard all work well.
Avoid plastic bags or airtight containers. Canvas needs to breathe, and sealing it in plastic traps any residual moisture.
Roll the swag loosely rather than compressing it tightly. Hard compression over time reduces the recovery of the foam mattress inside.
Inspect before you pack:
Before each trip, give the canvas a quick check. Look for any areas where the seams are starting to lift, where stitching looks worn, or where the canvas has any small tears or abrasion damage. Catching these early and treating them with seam sealer or a canvas repair patch keeps small issues from becoming bigger ones in the field.
A Seasoned Swag Is a Reliable Swag
The whole point of a swag is to get you outside with as little fuss as possible. A swag that leaks in wet weather or that's gone mouldy in storage doesn't do that job.
Seasoning before the first trip, sealing the seams, and airing it properly after each outing covers the basics of swag maintenance. Do those three things and a quality canvas swag will perform reliably for years, whether you're sleeping under clear skies in the outback or riding out a night of heavy rain somewhere on the coast.
A new swag is an investment. The hour or two you spend on seasoning before it ever leaves home is the most straightforward way to protect that investment and make sure it does what you bought it to do every single trip.
OZtrail swags are built from heavy-duty canvas with reinforced seams and PVC bucket floors. Find the right swag for your next adventure in the OZtrail swag range.
But we don’t stop at tents. You’ll also find everything you need for the full camping setup:
- Tent Accessories
- Camping Accessories
- Camping Furniture
- Lighting
- Power, Solar & Electrical
- Bedding
- Fridges & Coolers
Place your order online, and we’ll deliver your camping gear right to your doorstep.
