4.8/5 rated by 500k Happy Customers

Amptern | Full Expansion, Long-Lasting Seal

Upgrade your toolkit with Amptern’s high-performance gear. Trusted by over 5,000+ DIYers and pros nationwide.

U.S. Based Support
30-Day Hassle-Free Returns

Seals Gaps & Cracks

Improves Comfort Year-Round

Bills Lower Energy

Insulation High Performance

Trusted by Pros & Homeowners Across the Country

Over 5,000+ successful insulation & sealing projects. Here’s what they have to say.

THE HIDDEN ENERGY LEAK EVERY HOME EXPERIENCES

THE HIDDEN ENERGY LEAK EVERY HOME EXPERIENCES

Unsealed gaps and cracks waste up to 30% of your home’s energy every month. Drafts, air leaks, and moisture buildup slowly compromise your comfort—draining your wallet and straining your HVAC system.

Uncontrolled Air Leaks = higher energy bills, uneven room temperatures, stubborn draft zones, and risk of moisture damage.

Amptern™ Pro Insulation Kit expands instantly to seal hard-to-reach cracks and gaps—delivering high-performance thermal insulation and maximum energy efficiency for total peace of mind.

  • Seal Drafts
  • Block Moisture
  • Thermal Control
  • Sound Proof
  • 30-Day Money Back Guarantee

WHY TRUST US

30-Day Money-Back Guarantee

30-Day Money-Back Guarantee

We stand behind our products. If you’re not satisfied within 30 days, we’ll make it right with a full refund.

1 Year Warranty

1 Year Warranty

We've got your back

24/7 Friendly Support

24/7 Friendly Support

Real Humans. Real Help.

THE POWER YOUR HOME NEEDS

Professional-grade sealing. Maximum yield. Built for ultimate durability.

Class A Fire-Rated +

Fully meets ASTM E84 safety standards for total peace of mind.

Advanced Hybrid Formula +

Combines closed-cell durability with high-expansion coverage.

R-7.4 Thermal Insulation +

Superior heat barrier and soundproofing at 2 inches.

Universal Adhesion +

Bonds tightly to wood, metal, concrete, drywall, and brick.

Maximum Coverage Yield +

High-output formula delivering 20 board ft per can for large projects.

How We Are Different

Amptern™ seals air leaks, boosts energy efficiency, and lasts all in an easy DIY kit.

How We Are Different

Amptern™ seals air leaks, boosts energy efficiency, and lasts all in an easy DIY kit.

OTHER BRANDS
Performance
High-R-value thermal insulation Lower R-value
Energy Savings
Reduces heating & cooling costs Reduced efficiency
Independently Verified
Premium Rigid Foam Formula Absorbs moisture
Air Sealing
Seals cracks, gaps, and leaks Poor gap sealing
Moisture Protection
Acts as vapor & moisture barrier Leaves gaps unsealed

Year-Round Thermal Protection

Long-Lasting Protection for Energy Efficiency and Comfort
92%

Superior Thermal Control

Year-Round Comfort
93%

Easy DIY Installation

Ready to Start Right Out of the Box
95%

Reduced Air Drafts

Seals Air Leaks Around Doors, Walls & Rim Joists
97%

Highly Recommend AMPTERN

Professional Results, No Contractor Required
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Precision Foam Technology for Durable Construction

Amptern adheres to the core philosophy of Amp (full expansion) + Tern (permanent stabilization). Focusing on high-standard polyurethane foam technology, we strictly follow American building material safety and environmental compliance standards, abandoning inferior formulas that cause hollow foaming, collapse, and cracking.

TRY AMPTERN 100% RISK-FREE FOR 30 DAYS

Experience the transformation or receive a full refund. Zero hassle

TRY IT, RISK-FREE

TRY AMPTERN 100% RISK-FREE FOR 30 DAYS

Experience the transformation or receive a full refund. Zero hassle

TRY IT, RISK-FREE