Anagha Engineers Sealant Use At Home

Expandable PU Foam Sealant – The What, How and the Why

Expandable PU Foam Sealant -
What is it?

Expandable Polyurethane Foam Sealant  is dispensed as a frothy liquid which expands and moisture-cures into a solid foam insulation and sealant. Being a one-component foam, PU sealant is used to fill and seal small cracks and voids such as around door and window frames, sill plates, electrical devices where air leakage and energy loss can occur. Formulations are available for general use and specific applications such as sealing windows and doors, fire blocking, and construction adhesive.

Things to know before
using PU Sealant

PU Sealant is generally made available in two forms – 

Here, we attempt to show you how to use this product, whether you do it manually or by using a gun.

Using Spray Can

AE 100 PU Foam Spray

  1. Clean the application area with water spray.
  2. 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.
  3. Surface must be dampened enough to ensure that the PU sealant finds adequate moisture for its hardening process. Otherwise, it could impair the adhesion and edge adhesion.
  4. Attach the Straw on the can.
  5. Shake the can vigorously  for 20 to 25 times.
  6. Hold the can upside down such that the valve faces downwards. This is the only way to completely empty the can.
  7. Press the trigger, foam will rush out of the can under pressure.
  8. Keep shaking the can.
  9. 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.
  10. The foam cures in 20 – 40 minutes depending upon weather conditions.
  11. After curing , extra foam can be cut with a sharp knife.
  12. PU sealant is paintable. It is not UV resistant – should not be exposed to direct sunlight. If unavoidable – paint the foam to protect from sunlight.

Using Gun Grade PU Sealant

  1. Clean the application area with water spray.
  2. Moisten the area using the same 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.
  3. Surface must be dampened enough to ensure that the PU sealant finds adequate moisture for its hardening process. Otherwise, it could impair the adhesion and edge adhesion.
  4. Attach the gun on the spray can, hold the gun such that the can is upside down .
  5. Adjust the knob at the end of gun to control dispensing speed/ quantity. Press gun trigger for application.
  6. Keep shaking the can.
  7. Gun mounted  can be used and stored for a day or two , provided the tip of gun is sealed from moisture – using grease etc.
  8. The foam cures in 20- 40 minutes depending upon weather conditions.
  9. After curing, extra foam can be cut with a sharp knife.
  10. PUF sealant is paintable. However, it is not UV resistant – should not be exposed to direct sunlight. If unavoidable – paint the foam to protect from sunlight.
  11. After emptying  the can , mount the PU cleaner – press  till entire foam is extruded from the gun and the gun is free from foam .
  12. Gun and cleaner can be removed and stored till next usage.

Where Can You See PU Sealant In Use?

  • 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?

  1. Construction: Fitting Door frames, window frame gaps, sealing tie rod holes/joints, gap between bricks and  beam, bonding AAC blocks.
  2. Power plants: Sealing gap between cable and wires, gap between electric panel outlet.
  3. Solar Plants:  Sealing gaps between cable and wire.
  4. Interiors: Gap filling.
  5. Terrace: heat insulation.
  6. Cold Storage/ Wooden houses: Gap filling purposes.
AE 100 PU Foam Application
AE 100 PU Foam Sealant is easy to apply, offers long life and checks alll the boxes for a desirable PU sealant.

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