Description
BOSTIK PU Foam is a high-performance, single-component expanding polyurethane foam designed for filling, sealing, and insulating gaps and cavities. It provides excellent adhesion to most building materials, including wood, concrete, brick, metal, and plastic. The foam expands to fill irregular spaces, offering effective sound and thermal insulation. Ideal for construction, installation, and repair applications.
Available Pack Sizes
• 750 mL
Stock Status
In Stock
Product Highlights
- Expanding polyurethane foam for sealing and filling gaps
- Excellent adhesion to wood, concrete, and metal
- Provides superior sound and heat insulation
- Can be trimmed, sanded, and painted after curing
- Easy to apply using a PU foam gun or straw applicator
Technical Specifications
| Property | Specification |
|---|---|
| Base | Polyurethane Prepolymer |
| Appearance | Yellow Expanding Foam |
| Application Method | PU Foam Gun or Straw Applicator |
| Skin Formation Time | Approx. 10 minutes @ 25°C |
| Cutting Time | Approx. 30–40 minutes @ 25°C |
| Full Cure Time | 12–24 hours depending on humidity |
| Density (Cured Foam) | 25–30 kg/m³ |
| Expansion Rate | Up to 2–3 times the original volume |
| Temperature Resistance | -40°C to +90°C (Cured Foam) |
| Shelf Life | 12 months (unopened, upright storage) |
| Storage Conditions | Store upright in a cool, dry place (5°C – 25°C) |
Application Instructions
- Surface Preparation:
- Ensure surfaces are clean, dry, and free from dust or grease.
- Lightly moisten the surface with water to improve adhesion and curing.
- Application:
- Shake the can vigorously for at least 30 seconds before use.
- Screw the can onto the applicator gun or attach the straw nozzle.
- Apply foam from bottom to top, filling gaps up to 60% to allow for expansion.
- After curing, trim excess foam and sand if required.
- Note: Do not apply in freezing conditions or near open flames.
Coverage Calculator
- Approx. 30–40 liters of cured foam per 750 mL can (depending on conditions).
- Coverage depends on joint size, ambient temperature, and humidity.
Suitable Applications
- Filling gaps around windows and door frames
- Sealing wall penetrations and pipe entries
- Insulating gaps between floors, ceilings, and walls
- Acoustic and thermal insulation applications
Compatibility & Limitations
- Adheres to most common construction materials.
- Not UV resistant — protect with paint or sealant when exposed to sunlight.
- Do not apply on polyethylene, polypropylene, or PTFE surfaces.
Safety & Handling
- Use in well-ventilated areas and wear gloves and goggles.
- Avoid inhalation of vapors during use.
- Store can upright and away from heat or direct sunlight.
- Keep out of reach of children.
Frequently Asked Questions
It’s used to fill and seal gaps, cavities, and joints in construction applications.
Yes, it’s ideal for sealing around window and door frames without warping them.
A 750 mL can yields approximately 30–40 liters of cured foam.
Yes, but it should be painted or coated to protect it from UV exposure.
It cures within 12–24 hours, depending on humidity and temperature.
Yes, once cured, it can be trimmed, sanded, and painted easily.
It adheres to most materials except polyethylene, polypropylene, and PTFE.
Yes, cured foam resists temperatures from -40°C to +90°C.
Shake well, apply with a foam gun or straw nozzle, and fill gaps up to 60% for controlled expansion.
Store upright in a cool, dry area (5–25°C), away from heat sources or sunlight.
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