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HPMC for Exterior Insulation and Finish Systems (EIFS)

November 30th 2023
SLEOCHEM

Hydroxypropyl methyl cellulose (HPMC) is a water-soluble cellulose ether that is commonly used as a thickener, water retention agent, and adhesive in a variety of construction applications, including Exterior Insulation and Finish Systems (EIFS). In EIFS, HPMC is used to improve the workability, adhesion, and water resistance of the system.

Benefits of using HPMC in EIFS:

  • Improved workability: HPMC helps to improve the workability of EIFS mixes, making them easier to apply and preventing them from drying out too quickly.
  • Enhanced adhesion: HPMC improves the adhesion of EIFS mixes to the substrate, which helps to prevent the system from delaminating.
  • Increased water resistance: HPMC helps to increase the water resistance of EIFS mixes, which helps to protect the system from moisture damage.
  • Improved thermal insulation: HPMC can help to improve the thermal insulation properties of EIFS by reducing thermal conductivity.

Types of HPMC used in EIFS:

  • Low viscosity grades: These grades are used for applications where a low viscosity is desired, such as in base coats and primers.
  • Medium viscosity grades: These grades are used for applications where a medium viscosity is desired, such as in finish coats.
  • High viscosity grades: These grades are used for applications where a high viscosity is desired, such as in adhesives.

How to use HPMC in EIFS:

HPMC is typically added to EIFS mixes in dry form. The amount of HPMC that is needed will depend on the specific application and the desired properties of the EIFS mix.

Storage and handling of HPMC:

HPMC should be stored in a cool, dry place away from direct sunlight. It should also be kept away from heat sources and open flames.

Safety precautions:

HPMC is a non-toxic and non-hazardous material. However, it is important to wear appropriate safety equipment, such as gloves and a dust mask, when handling HPMC.

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