Pu foam spray

Our Pu foam spray is a one-component, moisture-curing foam designed for professional sealing, insulating, and bonding applications. It expands rapidly after application, filling gaps, cracks, and cavities with strong adhesion and excellent thermal insulation performance，the Pu foam spray expands and cures upon contact with atmospheric moisture, providing an airtight, water-resistant, and thermally insulated seal.

Pu foam spray types:

PU Foam (Straw Type)– Easy to use for DIY and small jobs
Gun Grade PU Foam– Professional precision control and reusable
Fire Rated PU Foam– Fire-resistant for safety-critical applications
Low Expansion Foam– Ideal for windows and doors

Key Features of polyurethane expanding foam:

High Expansion Rate– Efficiently fills gaps and irregular spaces
Easy Application– Available in straw type and gun grade
Excellent Insulation– Superior thermal and sound insulation properties
Strong Adhesion– Bonds to concrete, brick, metal, wood, and PVC
Air Tight Sealing– Prevents air leakage in HVAC systems
Moisture & Weather Resistant– Suitable for indoor and outdoor use
Eco-Friendly Options– Low VOC and CFC-free formulations available

Applications of pu foam spray:

1. Construction & Building

Window and door frame installation
Wall gap filling and crack sealing
Roof and wall insulation

2. HVAC & Duct Sealing

Air duct sealing
Preventing energy loss in HVAC systems
Pipe penetration sealing

3. Industrial Use

Equipment insulation
Soundproofing applications
Packaging and void filling

4. DIY & Home Improvement

Filling holes and cracks
Sealing around pipes and cables
Insulating garages and attics

Specifications :

Property	Value
Base Material	Polyurethane (PU)
Tack-free Time	8 – 12 minutes ( $25$ °C / $50$ % RH)
Cutting Time	45 – 60 minutes
Full Cure Time	24 hours
Yield (Expansion)	Up to 35–40 Liters (750ml can)
Temperature Resistance	$-40$ °C to $+90$ °C (Cured)
Fire Class	B2 / B3 (Available upon request)

Packaging & OEM Service

Standard size: 300ml / 500ml / 750ml
Custom branding available
Multilingual label design support
Flexible packaging solutions

How to Use polyurethane Expanding Foam:

Shake the can well before use
Clean and moisten the surface
Apply foam into gaps (fill ~50% as it expands)
Allow curing and trim excess foam

What is expanding foam used for?

Expanding foam is widely used for sealing gaps, insulating spaces, and preventing air leakage in construction and HVAC systems.

Is polyurethane foam waterproof?

PU foam is water-resistant but not fully waterproof. It can resist moisture but should be protected for long-term exposure.

How long does PU foam last?

Properly applied polyurethane foam can last over 10 years without losing performance.

What is the difference between PU foam and spray foam insulation?

PU foam is the material, while spray foam insulation refers to its application method.

silicone sealant