KASTAR 283 Fire Rated Acrylic Sealant

Water-based, Excellent fire resistance, able to prevent burning

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Kastar 283 Acrylic FireStop Sealant is a single-component, non-sag, fire rated acrylic based sealant, A high-performance acrylic sealant for construction joints, and the sealing of service penetration in plasterboard, concrete, and masonry wall construction. When cured, KASTAR 283 provides an elastic, flexible seal that prevents the passage of fire and smoke. Fire caulk sealant is also an effective acoustic sealant.


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Technical Data

*Curing condition of the sample: 23℃×50%RH× 14 days

1Basic materialSynthetic Latex Emulsion
4Application ConsistencyBrush, Trowel, Caulking Gun, or Power Extrusion
5Net Weight948 grams
6Average Nonvolatile(FSTM 9A)55% by value (69% by weight)
7Temperature Resistance-20℃to 110℃
8Service Temperature limits-7℃to 93℃
9Storage Temperature5℃to 35℃
10Application Temperature5℃to 50℃
11Skin Drying Time(mins)7
14Tack free time(min)18
15Elongation at break(%)≥108
16Elongation at break after immersion
17Curing rate(2mm/h)20
18Consistency (cm)8.5
19Solid content (%)80
20Shelf life24 months
21StorageStorage in cool and dry place at room temperature.

Product Features

KASTAR 283 Fire Rated Acrylic Sealant

Kastar Fire Rated acrylic sealant is specially formulated for indoor joints where fire resistance is needed. For example buildings, drywall systems, door and window frames, ceilings, cable work, wood, uPVC et.

  • Paintable and water-based
  • Exterior or interior use
  • Fireproof for up to 4 hours
  • Water based one component and easy to use
  • Excellent sealing performance, smoke blocking
  • Excellent fire resistance capacity
  • No smell & Non-Toxic
  • Filling Joints up to 50mm

Wide application scope

Range of application of Fire Rated acrylic sealant: Fire-proof and moisture-proof sealing for decoration of hotels, cinemas and other public places, sticky and flame-retardant sealing for fire protection projects of various doors, windows, glass and curtain walls, And the fixing and flame-retardant sealing of electronic and electrical components.

KASTAR 283 Fire Rated Acrylic Sealant

Kitchen ventilator

KASTAR 283 Fire Rated Acrylic Sealant

High precision instrument

KASTAR 283 Fire Rated Acrylic Sealant


KASTAR 283 Fire Rated Acrylic Sealant

Disinfection cabinet

KASTAR 283 Fire Rated Acrylic Sealant

Induction cooker

KASTAR 283 Fire Rated Acrylic Sealant


KASTAR 283 Fire Rated Acrylic Sealant

Fire Door

KASTAR 283 Fire Rated Acrylic Sealant

Air Conduit

KASTAR 283 Fire Rated Acrylic Sealant

Steel Cpanel


  • Sealing exterior and interior construction joints & expansion joints
  • Excellent for caulking around concrete panels, block work, brickworks, gaps around cables,
  • metal pipes, conduits, busways, and ducts that penetrate walls, floors, and ceilings.
  • Sealing joints in plasterboard technology and fire-rated system.
  • Small plaster repairs before painting.
  • Sealing around window and door frames.
  • Sealing of aerated concrete.
  • Sealing joints or penetrations requiring 4 hours fire rating.
  • Sealing joints in pre-cast panels.
  • To prevent the spread of fire and smoke through walls and floors.
  • Perimeter sealing of doors and window framing

Application Instructions

  • The surface must be dry, clean, and free from dirt oils, stains, or other surface contaminants. Remove all loose materials.
  • Always use a standard caulking gun to dispense the sealant.
  • Caution: The use of a caulking gun is critical and highly recommended to ensure the best finish and faster application.
  • Ensure that sealant is in contact with both sides of joints and gaps. Use foam backer rods as necessary.
  • Remove excess sealant and smooth it off with a flat knife. The applied sealant is touched dry after 30 mins. Protect from water exposure for at least 4 hours after application. Can be painted over after 2 hours.

Clean up

Clean up with water before sealant cures.

Saftey directions

  • Avoid contact with Skin and eyes and avoid breathing vapor.
  • If swallowed seek medical attention.
  • Keep out of reach of children.