Booth Q&A: Order, Support & Booth Knowledge

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Our website processes payments in USD by default. If your card or PayPal account is in another currency, the conversion will be handled automatically by your bank or PayPal.

Yes. All payments are processed through secure, encrypted gateways (SSL). We do not store your credit card details on our servers.

First, double-check your billing and shipping information and ensure that your card has sufficient balance or credit. If the problem persists, please try a different card or payment method, or contact your bank.

Yes, if you need a formal invoice or receipt for business use, please contact our support team.

Yes, we do! Our free shipping policy currently applies only to the contiguous United States (excluding Alaska, Hawaii, and Puerto Rico), as long as local stock is available. Shipping to all other countries and regions will incur additional charges.

Standard processing time is 1 business day. Delivery times vary depending on your location:

• United States: 3–7 business days
• International Orders: 7–10 business days (customs clearance may apply)

Delivery details will be provided in your confirmation email.

We primarily ship via UPS, FedEx, or DHL, depending on your location and order size.

Yes. Once your order has shipped, you will receive an email with a tracking number so you can follow your package in real time.

Please contact us as soon as possible. If your order has not yet been shipped, we can update your address. If the order has already been shipped, changes may not be possible or may incur an additional handling fee.

If your package does not arrive within the estimated time, please contact our support team and we will assist you in locating it.

Sewinfla booths are designed and engineered in the United States — product design, airflow engineering, fabric specification, and quality-control standards are all developed by our team at our La Verne, California headquarters. Manufacturing and assembly take place on our production lines in China and Vietnam, under US-developed specifications and per-batch quality control. Finished inventory is stocked at our California warehouse, plus warehouses in the UK and Australia.

If your order arrived damaged, has a manufacturing defect, or isn't what you ordered, don't worry — we've got you covered.

Just send our Customer Service team your order number along with a photo of the damaged or incorrect item, and we'll take care of the rest.

You can reach us anytime at sewinfla@ejaee.com, and we'll do our best to fix the issue quickly. We value every customer and want to make sure you're happy with both your products and our service.

Yes, exchanges are possible as long as the item is unpacked, unused and in original condition. Please note that price differences and additional shipping costs may apply.

Once we receive and inspect your returned item, refunds are typically processed within 5–7 business days. The credit will be applied to your original method of payment.

Return shipping costs are the responsibility of the customer, unless the return is due to a product defect or an error on our part.

Work backwards from the largest thing you will paint, then add walking room. For a car or SUV you want 2–3 ft (0.6–1 m) of clear space on every side and above the roof; for parts and motorcycles, 1 m at each end is usually enough. Our size classes map like this: 13×8×8 ft for parts, bikes and fenders; 20×10×9 ft or 20×13×8.5 ft for a sedan or compact SUV with a walk-around; 26×15×10 ft for a full-size truck, SUV or van; 39×20×13 ft and larger for buses, boats and multiple vehicles. Also check two hard limits: the booth door opening has to pass the widest part of what you are painting, and the booth height needs at least 1 ft above the highest point you must reach. The full dimension table, including external vs internal size, is in our Size-by-Size Guide.

Limit continuous blower operation to 8 hours, then let the motor cool. Overheating is the primary failure mode for continuous-duty blower motors, which is why we publish the 8-hour ceiling on every size class. If your paint needs to cure inside the booth beyond that window, buy a spare blower and alternate between the two every 8 hours — the booth has to stay fully inflated for the whole curing period, so you cannot simply switch it off. Never leave a running blower unattended overnight. Between sessions, blow dust out of the motor cooling fins with compressed air (30 PSI maximum); blocked fins can cut heat dissipation by up to 40%.

Outdoors yes, in wind no — and never without anchoring. The envelope is a tensioned membrane, so it is the wind that decides when the session ends, not the paint. Three rules: (1) secure every D-ring with ground stakes or sandbags before the blower goes on — on the 11–12 m class this anchor-first sequence is a non-negotiable safety requirement because of the much larger sail area; (2) never inflate an unanchored booth, since a gust will move it and a moving booth drags its blower and cord with it; (3) stop and deflate as soon as the walls ripple or the shell starts to shift — at that point the wind is already too strong for the blower to hold rated pressure, and finish quality is gone anyway because overspray drifts. Site the exhaust downwind of the intake so you are not recirculating your own solvent vapour.

Two stages, two intervals. The fibre pre-filter (MERV 8–11) runs 30–60 days, roughly every 3–5 full spray jobs. The activated-carbon panel runs 80–120 spray hours — about every 4–6 months for a hobbyist and monthly for a shop spraying 60–120 hours a month. The physical swap takes 10–15 minutes: power down, open the housing, note the airflow arrow, drop the spent panels straight into a bag without shaking them, wipe the housing, then check the 3 mm perimeter gasket before fitting the new pair. A bypass leak around that gasket is the most common reason a booth still smells of solvent after a filter change. Facilities covered by the spray-finishing standard must move spent filter pads out of the booth at the close of the day's operation rather than leaving them to off-gas. Costs and the full schedule are in our filter replacement guide.

The fabric and what it can hold. The standard line uses Oxford fabric — a woven polyester base with a PU coating — and relies on positive pressure, so the shell stays taut and any leakage pushes booth air out rather than drawing workshop air in. That is the value pick for occasional spraying and for sheltered outdoor use. The airtight line is PVC-laminated fabric with sealed seams, zipped air outlets and a waterproof, washable skin: overspray and solvent vapour cannot migrate through the walls, which is what makes it possible to run the booth under negative pressure with an inline exhaust fan and to use it inside a shared building where the airborne paint has to stay put. It costs and weighs more. For whole-vehicle refinishing, the federal rule for area sources expects a booth that is fully enclosed with a full roof and four complete walls or side curtains and ventilated at negative pressure — the airtight line is the one built to hold a seal against a fan. Material by material: 210D vs 420D vs PVC.

You need both, running together. The blower does two jobs: it holds the shell rigid and it supplies filtered make-up air. The exhaust fan removes the air volume that carries overspray and solvent out of the enclosure. Blower only gives you a pressurised but stagnant booth — overspray hangs in the air and visibility collapses. Exhaust only depressurises the shell, so the walls suck inward and unfiltered workshop air is pulled in through every seam. Size the exhaust as booth volume (ft³) × air changes per hour ÷ 60, then multiply by 1.3–1.5 to cover filter loading: a 20×13×8.5 ft booth is about 2,210 ft³, so 2,210 CFM at 60 ACH baseline or 3,315 CFM at 90 ACH for solvent-heavy base and clear, before the derate. Run the arithmetic for your size in the CFM calculator guide.

The enclosure works; the filtration stage does not, and we will not pretend otherwise. Our booths are configured and filter-rated for liquid spray finishing: a fibre pre-filter for overspray particles plus an activated-carbon panel for VOC solvent vapour. Powder coating produces no solvent vapour — the airborne material is reclaimable powder that needs a recovery stage (cyclone, reclaim unit or cartridge collector) rather than a carbon bed, and powder/air mixtures are combustible. So there is no published Sewinfla powder-recovery configuration. If you powder coat, use dedicated recovery equipment, ground both the workpiece and the enclosure, keep ignition sources out, and confirm the arrangement with your coating-equipment supplier and your local fire authority. For liquid coatings, start with how the airflow and filtration path works.

Pack it down after every session — it takes about 10 minutes and it is the single cheapest thing you can do for service life. The booth must be bone-dry first: moisture trapped in a fold breeds mildew within 48 hours and permanently stains the coating. Then loose-roll rather than repeatedly crease it: fold in thirds lengthwise and roll from one end, alternating the starting end each time so the same fold lines are not fatigued. Store between 40 °F and 100 °F (4–38 °C), and never fold PVC below 50 °F (10 °C) because cold PVC cracks along the fold. Add 2–3 silica gel desiccant packs to the bag and replace them quarterly. Keep the bagged booth inside a rigid tote — rodents will chew through Oxford fabric in under 30 seconds to nest in residual paint odour. Full routine: maintenance & storage guide.