COSMOS MRO P.U. Foam Spray – Expanding Gap Filler & Insulator

COSMOS MRO PU Foam Spray: Professional Grade Expanding Polyurethane Foam

For instant gap filling, sealing, and insulation, COSMOS MRO PU Foam Spray is the essential product for construction, plumbing, and home repairs. This single-component, moisture-curing polyurethane foam expands rapidly upon application to fill cavities, cracks, and voids, creating an airtight and waterproof seal. It is a vital tool for preventing heat loss, reducing noise, and stopping pests from entering your home.

COSMOS MRO PU Foam Spray adheres strongly to wood, metal, masonry, and most building materials. Its expansive nature makes it ideal for securing window and door frames, sealing electrical conduits, and insulating roof gaps where conventional fillers fail due to size or complexity.

Why Choose COSMOS MRO PU Foam Spray?

Unlike traditional plaster or caulk, PU foam provides structural filling and insulation in one easy step:

• High Expansion Rate: Expands up to 30 times its original volume, allowing a single can to seal a large area quickly and economically.
• Excellent Insulation: Creates a strong thermal and acoustic barrier, significantly reducing drafts and noise transmission.
• Strong Adhesion: Bonds securely to virtually all common building materials, forming a durable, permanent seal.
• Moisture Resistant: Once cured, it is waterproof and prevents moisture ingress, crucial for waterproofing applications around pipes and vents.

Key Features of COSMOS MRO PU Foam Spray

• Multi-Purpose: Fills, seals, bonds, and insulates simultaneously.
• Fast Curing: Tack-free (touch dry) in minutes, with full cure achieved within hours, depending on humidity.
• Trimable: Once fully cured, the excess foam can be easily cut, sanded, painted, or plastered over.
• Temperature Stability: Maintains its integrity across a wide range of temperatures.

Recommended Application Areas

This expanding foam sealer is essential for:

• Window and Door Frames: Filling the gaps between the frame and the masonry opening for insulation and stability.
• Pipes and Vents: Sealing openings around water and HVAC pipes to prevent air and pest infiltration.
• Electrical Conduits: Sealing electrical boxes and cable entries in concrete to prevent moisture migration.
• Roof and Attic: Filling difficult-to-reach gaps in roofing structures for thermal insulation.

Technical Specifications: COSMOS MRO PU Foam Spray

How to Use COSMOS MRO PU Foam Spray

Proper technique ensures maximum expansion and adhesion:

1. Preparation: The surface must be clean and free of loose particles. Moisten the surface with a fine water mist before application—this is crucial for rapid and complete curing of the foam.
2. Application: Shake the can vigorously for one minute. Screw the nozzle adapter onto the valve. Hold the can upside down and fill the gap only about 30–40% full, as the foam will expand to fill the rest.
3. Curing: Allow the foam to fully cure (usually 1-3 hours). If filling large gaps, moisten the foam every hour to aid deeper curing.
4. Finishing: Once fully cured, trim any excess foam using a sharp knife or saw. The foam can then be sanded, plastered, or painted over for aesthetic purposes. Find expert tips on handling and curing PU foam.

Frequently Asked Questions (FAQ)

Q: Does the foam need moisture to cure?
A: Yes. Polyurethane foam cures by reacting with moisture in the air or on the substrate. Always mist the surface with water before and during application for best results.

Q: Will it bond to glass?
A: Yes, it bonds well to glass, but it is not recommended for visible structural sealing applications where a clear, UV-resistant caulk is required.

Q: Can I use this for deep holes?
A: Yes, but apply in multiple layers, moistening each layer lightly before applying the next one to ensure the inner foam cures completely.