Expanding PU Foam Spray Sealant
Expanding Foam spray Sealant is generally made available in two forms – 
- Spray Can – Dipensed using an adopter or straw or Pipe : one straw is preattached to the can .
- Gun grade – Dispensed using a Hand held PU Gun
Furthar it is classified into B3 ( Non FR ) type and B1( FR ) type PU foam spray.
How to use Expanding foam spray sealant
- Clean the application area with water spray.
- Moisten the area with Water spray. PU foam adheres to almost all surfaces that are strong, clean and free of dust and grease. Only silicon, oils, greases, polyethylene, teflon or similar surfaces are not suitable to be applied on.
- Surface must be dampened enough to ensure that the foam sealant finds adequate moisture for its hardening process. Otherwise, it could impair the adhesion and edge adhesion.
- Attach the Straw on the can.
- Shake the can vigorously for 20 to 25 times.
- Hold the can upside down such that the valve faces downwards. This is the only way to completely empty the can.
- Press the trigger, foam will rush out of the can under pressure.
- Keep shaking the can.
- Plan the work such that entire can material is consumed in one go, i.e., after opening the can, it should be completely consumed. This is recommended because whatever is left will get cured inside the can and thus go to waste.
- The foam cures in 30 – 40 minutes depending upon weather conditions.
- After curing , extra foam can be cut with a sharp knife.
- Foam sealant is paintable. It is not UV resistant – should not be exposed to direct sunlight. If unavoidable – paint the foam to protect from sunlight.
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Uses of Expanding Foam Spray Sealant
- Filling of joints, seams and cracks in partition walls with ceilings.
- Structural space between window and door frames and walls.
- Structural and fitting space between prefabricated construction elements
- Around cables and pipes, penetrations through walls and ceilings.
- Gluing panels/ insulating sheets.
Which Industries Require This Product?
Foam spray sealant is a verstile product used for sealing, bonding, gap filling, sound insulation, thermal and electrical insulation, waterproofing etc.
- Construction: Fitting Door frames, window frame gaps, sealing tie rod holes/joints, gap between bricks and beam, bonding AAC blocks.
- Power plants: Sealing gap between cable and wires, gap between electric panel outlet.
- Solar Plants: Sealing gaps between cable and wire.
- Interiors: Gap filling.
- Terrace: heat insulation.
- Cold Storage/ Wooden houses: Gap filling purposes.
Applications | Industry | Product used | Traditional Method | Advantages over Traditional Method |
| Fixing of window/door Frame | Construction | PU foam spray cans ( 750 ml ) | White cement | Faster process , time saving Reduction in Labour cost Excellent aesthetics, no cracks developed with time . Additional strength provided to door frame, number of anchor fasteners can be reduced |
| Installation of Fireproof doors & Windows | Construction | PU foam spray cans ( 750 ml ) | White cement | Faster process , time saving Reduction in Labour cost Excellent aesthetics, no cracks developed with time Additional strength provided to door frame, number of anchor fasteners can be reduced |
| Sealing Split AC holes carrying cables | Construction, HVAC | PU foam spray cans ( 750 ml ) | Cement, Thermocol etc | 100% sealing guaranteed Faster process Saving in labour cost Excellent aesthetics |
| Insulation for Plumbing pipes | Construction | PU foam spray cans ( 750 ml ) | Insulating material | 100% sealing guaranteed Faster process Saving in labour cost |
| Sealing Tie Rod holes | Construction | PU foam spray cans ( 750 ml ) | cement grouting , GP2 | cost saving , 68% reduction in cost Productivity improvement by 500% Leak free – better reliability Improved aesthetics |
| Joint/ seam between Wall and Beam( Ceiling) | Construction | PU foam spray cans ( 750 ml ) | Cement grouting, Sealants | 100% sealing guaranteed Faster process Saving in labour cost Excellent aesthetics |
| Sealing of all Openings in Roof construction, especially metal roof | Construction | PU foam spray cans ( 750 ml ) | cement , silicone sealant | 100% sealing guaranteed Faster process Saving in labour cost Excellent aesthetics |
| Improving Thermal insulation in cooling systems | HVAC, Cold storage | PU foam Spray cans ( 750 ml ), 2 part Bulk spray system | Insulating material | highly efficient thermal insulation guaranteed Faster execution , Lower labour costs |
| Fire & Smoke Retardent sealant between wall, Floor and Ceilings | Construction | PU cans | no suitable alternative | efficient sealing at lower cost ease of application |
| Filling free spaces, cracks, gaps, pipe peneratations | Interior decorator, Furniture | PU cans | no suitable alternative | efficient sealing at lower cost ease of application |
| Back up material to Expansion joints | Construction | PU foam cans, 2 part Bulk spray systems | Backer rods | efficient sealing at lower cost ease of application |
| Sealing Duct Shafts | Construction | PU foam cans, 2 part Bulk spray systems | metal sheet etc | efficient sealing at lower cost ease of application |
| Filling free spaces, gaps | Boat Building | PU foam cans, 2 part Bulk spray systems | Thermocol | efficient sealing at lower cost ease of application |
| Model making, design patterns etc | Film Production Set , interior designers | PU cans | Thermocol | Ease of application Flexibility in design lower cost |
| sealing gap between cable and wires , gap between electric panel outlet | Process plants ,Eg: Power plants, Paper Mills, Chemical Plants | PU foam spray cans ( 750 ml ) | Rubber gasket, Silicone sealants | 100% electrical insulation lower cost enhanced safety |
| Terrace Waterproofing | Waterproofing | 2 part bulk spray system | Thermal & waterproof coatings | 100% effective Thermal insulation and waterproofing |
| sealing gap between cable and wires | Solar Plants | PU foam spray cans ( 750 ml ) | Silicone sealants, Rubber packing etc | 100% electrical insulation and waterproofing lower cost |
Expanding Foam Spray Sealant, gap filler sealant
Supex Pu foam spray
For best prices, technical seminar, demo kindly call us at Toll free no: 18001214771 | Whatsapp: 9833892782 | Email: sales@anaghaengineers.in
When NOT to Use Spray Foam Insulation
- For areas that are too close to electrical boxes:
- For areas too close to ceiling light boxes:
- Open-cell spray foam on your roof:
- For closed-cavity spaces:
- If you have a history of skin, respiratory, or asthma problems
Can expanding foam stop leaks? 
Even if water is sprayed directly onto it, it won’t allow it to travel through, acting instead as a barrier between it and the property within. This thermal resistance keeps cold air and water out: leaving the property within a comfortable temperature and, most importantly, completely dry.
Is expanding foam permanent?
Don’t use expanding foam as a permanent solution to leaks. The expanding foam will fill the gap however should you not fix the initial water damage, the leak could move into other parts of the basement. Furthermore, the expanding foam isn’t completely waterproof and therefore over time it could break down.
Does expanding foam stick better to wet surfaces?
Be careful, though; you want to dampen the area, not wet it. Foam sealant won’t stick well to a wet surface. You can also mist the foam after it’s applied to maximize expansion and speed up the curing process.
Can you use expanding foam twice?
Expanding foam in a can is a great way to seal up cracks and gaps around your home. But if you don’t clean out the spray tube after using it, it can become clogged with foam, making it unable to use again. To unclog an expanding foam spray tube, squirt liquid spray lubricant in the tube to soften the hardened foam.
How thick can you apply spray foam?
The ASTM E84 tests for most spray polyurethane foams limit the maximum installed thickness of foams to 4 inches or less. The ASTM E84 tests for some SPF products limit installations to a maximum of only 2 inches.
Summary
Article Name
Expanding foam spray sealant
Description
Types of expandable foam sealant, how to use, applications, Q&A
Author
Bibhas Agarwal
Publisher Name
Anagha ASF LLP
Publisher Logo
3 thoughts on “Expanding Foam Spray Sealant: Uses, types, advantages”
1. I have sump (tank) on my portico where water from Government supply and borewell falls and getting stored. From this tank a small motor is used to lift water to overhead tank.
2. Since portico is used to park car the lid of the cement tank, is made up of strong heavy gauge metal sheet well painted). However the lid need not be opened regularly, but only once or twice in year to clean the sump.
a. I have made small opening cut on the lid to check the level of water which can be closed with small lid. An idea well appreciated by others.
3. THE ISSUE: It is found that lot of ants, cockroaches and other insects are going inside the sump thru gaps of the lid which is fixed (welded) to a metal frame.
4. Now the question : Which sealant / caulk / Putty or ( whatever easily understandable names or generic name one can call it ) , that can be used to fill the problem gaps to avoid the unwanted penetrations stated above
a. Once filled, it need to be removed only once or twice in a year, for cleaning the sump.
b. Hence The ‘ filler “ should be somewhat strong , somewhat non toxic , that can be removed and re-filled afresh after clearing the tank
5. Any Advisers? If come out with some correct answers or affordable product, which can be easily apply (DIY) then I am sure there are lots of needy persons to buy it. Waiting answer ASAP.
Sir- You can use food-grade silicone sealant. https://anaghaengineers.in/product/silirub-is-food-grade-silicone-sealant-pack-of-24/
Required Puf Foam