Product Data Sheet Show all documents

Sika Boom® Pestblock

Pesticide-free pest blocking polyurethane foam

Sika Boom® Pestblock is a pesticide-free, one-component polyurethane foam designed to fill gaps, cracks, and cavities to help prevent entry of insects and small pests. Its high expansion allows effective filling of irregular spaces, and the cured foam can be trimmed, shaped, or sanded. The product includes a reusable dispensing straw for convenient on-site use.

  • Pesticide-free formulation suitable for use in living areas
  • No strong odour during or after application
  • Blocks insects, rodents, and other pests
  • High expansion for filling wide or irregular gaps
  • Adheres to most common building materials (concrete, wood, metal, glass, etc.)
  • Cured foam is rigid, mold-proof, waterproof, and over-paintable
  • Provides thermal and acoustic insulation
  • Includes a reusable dispensing straw; no special tools required
  • Applicable at -5 °C to 30 °C (23 °F to 86 °F)
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Product Data Sheet Show all documents

Usage

Sika Boom® Pestblock is suitable for filling gaps, joints, and cavities in residential and commercial construction, for both interior and exterior applications, including:
  • Entry points for insects and small pests (ants, bees, spiders, mice, etc.)
  • Wall penetrations and service openings (e.g. plumbing, electrical, HVAC penetrations)
  • Spaces around doors, windows, and other building elements
 

Advantages

  • Pesticide-free formulation suitable for use in living areas
  • No strong odour during or after application
  • Blocks insects, rodents, and other pests
  • High expansion for filling wide or irregular gaps
  • Adheres to most common building materials (concrete, wood, metal, glass, etc.)
  • Cured foam is rigid, mold-proof, waterproof, and over-paintable
  • Provides thermal and acoustic insulation
  • Includes a reusable dispensing straw; no special tools required
  • Applicable at -5 °C to 30 °C (23 °F to 86 °F)

Packaging

500 mL (455 g) can / 12 cans per case

Colour

Light yellow

Product Details

Product Information

Composition / Manufacturing

Polyurethane Prepolymer (Moisture-curing)

Shelf Life

15 months from production date

Storage Conditions

Store in undamaged, original, sealed packaging. Store upright, in dry conditions, protected from sunlight and heat, and at temperatures between 5–30 °C (41–86 °F).

Density

22 ± 3 kg/m3 (1.37 lb/ft3) Foam Cured

(ASTM D1622)
Technical Information

Compressive Strength

0.03 MPa (4.35 psi) 

(DIN 53421)

Thermal Conductivity

0.036 W/m.K, at 20 °C (68 °F)

(DIN 52612)

Service Temperature

-40 °C to 80 °C (-40 °F to 176 °F)

Application

Application Information

Product Temperature

Optimal can temperature is 20 °C (68 °F). Sika Boom® Pestblock should be kept at room temperature (20 °C (68 °F)) for at least 12 hours before application. 

Ambient Air Temperature

-5 °C to 30 °C (23 °F to 86 °F)

Substrate Temperature

-5 °C to 30 °C (23 °F to 86 °F)

Curing Time

24 hours

Cutting Time

30 - 45 minutes

(ASTM C1620)

Tack-free time

4 - 10 minutes

(ASTM C1620)
Consumption

Yield

15-23 L (4.0-6.0 US gal.)
Application steps

SUBSTRATE PREPARATION

Ensure the substrate is clean, sound, and free of dust, grease, or loose particles. Remove poorly adhering contaminants such as paint or cement laitance. Sika Boom® Pestblock adheres without primers. Lightly dampen the surface with clean water to ensure proper curing and reduce secondary expansion.

MIXING

Shake the can thoroughly for approximately 60 seconds before use and after long pauses. Turn the can upside down, attach the dispensing straw securely without pressing the valve. Control foam flow by adjusting pressure on the valve/adapter.

APPLICATION

Fill deep cavities in multiple layers. Allow each layer to expand and cure sufficiently before applying the next layer. Lightly spraying water between layers, or allowing adequate waiting time between applications, will help ensure proper curing.

Fill cavities to approximately 30 % of their volume to allow for foam expansion. All adjacent building elements must be temporarily supported or fixed in place until the foam has fully cured.

  

Note: Sika Boom® Pestblock must be applied with the can held upside-down. Failure to invert the can will prevent proper foam dispensing.

  

Reusable Straw: To ensure that the dispensing straw can be reused, place the can upright while it still contains foam. Fold the straw back onto itself and insert the open end onto the plastic tip above the trigger to a depth of approximately 10 mm (1/32 in) to prevent air from entering. Before reusing, shake the can, unfold the straw, and resume application.

CLEAN UP

Clean all tools and equipment immediately with Sika Boom® PRO Cleaner. Uncured foam can also be removed from surfaces using Sika Cleaning Wipes-120. Once cured, residual foam must be removed mechanically. Refer to Sika Boom® PRO Cleaner product data sheet for further information.

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