BEKO Well Foam 750 ml Gun Grade PU Expanding Foam for Wells, Shafts, and Sewage Systems

1-component polyurethane expanding foam engineered for sealing and filling in wells, shafts, sewage systems, manholes, and house connections. This gun-grade formulation delivers precise application and excellent adhesion to concrete, stone, PVC, and other common construction materials. Once cured, the foam is waterproof, rot-resistant, and resistant to standing water and common chemicals, making it ideal for demanding underground and water-exposed environments.

Advantages

Offers a high free-foamed yield of up to 45 liters per 750 ml can, providing excellent coverage and cost efficiency. Cures to a light yellow, semi-rigid foam with a density of approximately 15–25 kg/m³, delivering both thermal insulation (approx. 0.035 W/(m·K)) and sound insulation (approx. 60 dB). The foam is easy to cut and shape after approximately 30–40 minutes, and it reaches full cure within 24 hours. Its resistance to temperature extremes from -40°C to +90°C ensures long-term durability in harsh conditions.

Suitable for

• Sealing and filling around well casings and shaft linings
• Waterproofing manholes and sewage system connections
• Insulating and sealing house connection pipes and ducts
• Filling voids and gaps in concrete and masonry structures
• Applications requiring resistance to standing water and soil chemicals

Key specifications

• Product type: 1-component PU expanding foam (gun grade)
• Volume: 750 ml
• Color: Light yellow
• Application temperature (can): +5°C to +30°C
• Ambient temperature: +5°C to +35°C
• Skin formation time: approx. 8-12 minutes (at 20°C, 50% r.h.)
• Cuttable time: approx. 30-40 minutes (at 20°C, 50% r.h.)
• Full cure time: approx. 24 hours
• Temperature resistance (cured): -40°C to +90°C
• Yield (free foamed): up to 45 liters
• Density (cured): approx. 15-25 kg/m³
• Thermal conductivity: approx. 0.035 W/(m·K)
• Sound insulation: approx. 60 dB
• Shelf life: 18 months (stored upright, cool and dry)

Recommendations

For best results, store cans upright in a cool, dry place. Shake well before use and apply with a foam gun for precise dispensing. Ensure surfaces are clean and slightly damp for optimal adhesion. Protect uncured foam from direct sunlight and moisture during application.