FAQs

AMPTERN is a Hong Kong-based brand specializing in professional-grade chemical products for construction, woodworking, and DIY projects. We are committed to delivering products that offer reliable performance, transparent specifications, and a straightforward user experience—ensuring that actual product efficacy aligns perfectly with label claims.

Our products are manufactured according to U.S. quality standards and shipped from our warehouse located at 1103 S Westwood Ave, Addison, IL, 60101, USA. Each batch undergoes quality inspection before leaving the factory.

Both. Our spray foam kits, foam guns, and CA glues are engineered for professional contractors but packaged and priced for DIY homeowners too. Whether you're insulating a whole house or doing a one-time garage project, the same product works for you.

Yes. Contractors and businesses ordering in volume can get tiered pricing. Email home@ampternoffice.com with your project size or expected monthly volume and we'll send you a custom quote.

After curing, the spray foam remains durable for decades without sagging or breaking down

Yes — if you operate a hardware store, contracting business, or online marketplace, we offer dealer pricing and white-label options on select products. Reach out to home@ampternoffice.com with your business details to get started.

We currently only ship to addresses within the 48 contiguous United States.

ORDER PROCESSING TIME
Retail Orders: All retail orders are processed within 1 to 3 business days (excluding weekends and holidays) after receiving your order confirmation email. You will receive another notification when your order has shipped.

Wholesale Orders: For bulk or wholesale orders, lead times and processing schedules will be provided upon approval of your wholesale application.

SHIPPING TIMES & DELIVERY ESTIMATES
Shipping times depend on your geographical location and the carrier's transit schedules.

Standard Domestic Shipping: Estimated delivery typically takes 1 to 10 business days once shipped, depending on the destination region.

Holiday & Peak Season Notice: Please note that shipping times may be extended during statutory holidays, major promotional events, or extreme weather events due to high carrier volume and operational delays.

View full shipping policy

Yes. Once your order ships, we email you a tracking number and link so you can follow it every step of the way.

If your order hasn't shipped yet, email home@ampternoffice.com right away and we'll cancel it. Once it's on its way, we can't pull it back — but you can return it after delivery.

Email home@ampternoffice.com as soon as possible. If the order hasn't shipped, we'll update the address. If it has already shipped, we'll need to wait for the package to come back before resending or refunding.

No.We require a physical street address for all deliveries. PO boxes, APO/FPO addresses, and similar mail-only addresses can't be processed.

Email home@ampternoffice.com within 30 days of receiving your order. Include your order number and reason for return. Once approved, we'll send you a prepaid return label and instructions.

30 days from delivery.After that, we're unable to process returns. The item must be unused, in original packaging, with proof of purchase.

Inspection & Restocking Fee: All returned goods are subject to a final inspection by us at our discretion. All items returned to our inventory are subject to an 18% restocking fee if our examination reveals any issues or damage caused after delivery.

Return Shipping: Shipping costs will not be reimbursed unless the return is due to a shipment error (e.g., shipping the incorrect item).

No. Only unused items in original packaging are eligible.

Contact home@ampternoffice.com immediately with your order number and clear photos of the issue. We'll arrange a replacement or refund as quickly as possible.

Once we receive and inspect your return, we'll email you the approval status. Approved refunds go to your original payment method. Your bank may take a few business days to post the credit.

We can't process standard returns past 30 days. But if the issue is damage or a defect, email home@ampternoffice.com — we'll do our best to help.

We don't offer direct exchanges. The fastest way is to return the original item, then place a new order for the replacement.

AMPTERN Spray Foam has an R-value of R-3.7 per inch. As a closed-cell polyurethane foam, it sits in the medium-high range for thermal insulation performance. A higher R-value means better resistance to heat transfer — practical examples:

• 1" thickness = R-3.70
• 2" thickness = R-7.40
• 3" thickness = R-11.10
• 4" thickness = R-14.80
  
  

1. Shake the can thoroughly before use.
2. Attach the foam gun and apply evenly to the target area.
3. Let it expand to fill gaps and cracks.
4. Wait 24 hours for full cure before cutting or shaping.

Wipe excess foam with the foam cleaner before it cures — once it sets, you'll need to cut it off.

Tack-free in 5–15 minutes. Cuttable in about 1 hour.Fully cured in 24 hours.For maximum strength and insulation performance, don't sand, paint, or stress the foam until the 24-hour cure is complete.

For best results, apply when both the can and surface are between 41°F and 86°F (5°C–30°C). Cold chemicals don't mix or expand properly. If your kit has been cold, store it indoors at room temperature for at least 24 hours before use.

It bonds well to glass, MDF, wood, metal, concrete, stone, brick, granite, plaster, and most building materials — indoors and outdoors.

Avoid polyethylene, polypropylene, silicone, Teflon, and other non-stick plastics — foam won't adhere to these.

Yes. Once fully cured (24 hours), the foam can be trimmed and painted with most water- or oil-based paints. UV light yellows and degrades exposed foam over time, so painting or covering is recommended for any visible installation.

No. Cured polyurethane foam has no nutritional value and isn't a food source for mold, mice, or insects. Closed-cell foam acts as a moisture and air barrier, which actuallyreducesmold risk. Pests find sealed walls and crawl spaces harder to penetrate after foam application.

Closed-cell foam provides moderate sound dampening, especially for blocking air-transmitted noise that travels through gaps and seams. While it's not as absorptive as open-cell foam for pure acoustic applications, it still meaningfully reduces sound transmission in walls, ceilings, and crawl spaces — particularly when paired with sound-absorbing materials like rockwool batts.

Yes, when protected from direct sunlight (under eaves, in crawl spaces, on the underside of decks). Direct UV exposure causes the foam to yellow and break down over time. For exterior use, cover the foam with paint, drywall, or appropriate sheathing.

Yes. Once fully cured, the foam can be trimmed with a serrated knife, sanded, or shaped to a smooth finish. For closed-cell foam, a coarse rasp or grinder works best.

Unopened cans have a shelf life of up to 2 years from the manufacturing date when stored at room temperature in a dry, ventilated area. Once opened, use within 30 days — the gun stays usable longer if cleaned properly between sessions.

No. Cured foam is safe around standard electrical wiring and copper or PEX plumbing. Avoid spraying directly into electrical boxes — cover them with masking tape during application.

• Around recessed lighting that isn't IC-rated (heat hazard)
• Directly on hot surfaces like furnace flues or chimneys
• On non-stick plastics (PE, PP, Teflon, silicone)
• On wet surfaces (>20% moisture)
• In sub-41°F temperatures

Multiply the area (square feet) by the desired thickness in inches, then divide by the can's coverage:31.7 oz can: (area × thickness) ÷ 20 = cans needed

Spray it onto uncured (fresh) PU foam, wait a moment, then wipe. It dissolves wet foam off your gun, surfaces, and tools. Use it after every job to keep the gun in top condition.

After your last spray, leave the can attached and pull the trigger to expel a small amount of foam. Then thread the foam gun cleaner onto the gun and trigger it through to flush. Detach, wipe down the exterior, and store with the cleaner threaded on for next use.

No. Once foam has fully cured, only mechanical removal works — scraping, sanding, or cutting. The cleaner only dissolves uncured foam. Always clean tools immediately after use.

Yes. With proper cleaning between uses, the foam gun lasts for many cans and projects. Some users keep the gun threaded onto a partial can stored in a cool place — the foam stays usable for up to 30 days.

Yes. Our foam gun uses the standard B1 / NBS threaded fitting, so it works with most professional-grade PU foam cans on the market — not just AMPTERN. That said, we test our gun specifically with our own foam for the best dispensing experience and consistency.

• Always work in a well-ventilated area — open windows, use fans, or work outdoors when possible.
• Wear the included PPE (suit, glasses, gloves); for extended use, add a respirator with organic vapor cartridges.
• Avoid direct skin and eye contact with uncured spray foam — it bonds aggressively.
• Keep away from open flames during application — propellants are flammable.
• Always read the safety data sheet (SDS) on each product before use.

Many of our products — including the foam gun cleaner — are formulated with eco-conscious materials and processes. Cured polyurethane foam is inert and stable but not biodegradable; dispose of it according to local regulations. Check individual product pages for specifics.

Spray foam cans: If unused and pressurized, take to a household hazardous waste facility — most municipalities accept them for free. Foam gun cleaner: Treat as solvent — hazardous waste facility. Never pour any of these down drains or into the regular trash without checking your local regulations first.

A 100% unconditional refund within 30 days. If you're not satisfied with the Spray Foam Insulation Kit, or any other AMPTERN product, we'll refund you.

Your satisfaction is our priority. If anything is wrong or you're unhappy with a product, get in touch — we'll work to make it right.

Yes. All AMPTERN tools (such as our foam gun) come with a 1-year limited warranty against manufacturing defects. Consumables (spray foam, cleaner) are covered by our 30-day satisfaction guarantee. Register your purchase via our Warranty Registration form to activate coverage.

Email:home@ampternoffice.com— we typically reply within one business day.