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Astro Intumescent Mastic WHITE 310ml - 237450

Astro Intumescent Mastic WHITE 310ml - 237450

1579

Part number: 237450
£1.99
£2.39 inc. VAT
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Description

A one part fire rated intumescent acrylic mastic designed for sealing gaps around fire doors, window frames and for sealing joints, voids and irregular holes in fire rated structures, and for maintaining their integrity when sealing around pipes and cables that penetrate them.

The mastic has been independently tested in accordance with BS476: Part 20 & 22: 1987 and can provide up to 4 hours fire resistance depending on depth/width and volumetric area. PR EN1366-4, NHBC Type Approval.

Can be used on most construction substances, although we do recommend that a small area is tested on unusual substrates. It can be used in most low movement joints up to 25mm wide with no slump and can be overpainted. Further details and installation instructions available on request.

Acoustic performance: Weighted Sound Reduction Index (RW) of up to 57db to BSEN ISO 140-3.

JOINT TYPE

GAP SURFACE COMBINATION

GAP WIDTH MM

SEAL DEPTH
MM

INSULATION MINS

INTEGRITY MINS

HORIZONTAL

AERATED CONCRETE/ AERATED CONCRETE

10

6

54

240

HORIZONTAL

AERATED CONCRETE/ AERATED CONCRETE

20

20

UNCLASSIFIED

240

VERTICAL

AERATED CONCRETE/ AERATED CONCRETE

10

6

UNCLASSIFIED

231

VERTICAL

AERATED CONCRETE/ AERATED CONCRETE

12

12

UNCLASSIFIED

240

VERTICAL

AERATED CONCRETE/ AERATED CONCRETE

15

10

40

240

VERTICAL

AERATED CONCRETE/ AERATED CONCRETE

15

15

42

240

VERTICAL

AERATED CONCRETE/ AERATED CONCRETE

20

15

49

240

VERTICAL

AERATED CONCRETE/ AERATED CONCRETE

20

20

73

240

VERTICAL

AERATED CONCRETE/ AERATED CONCRETE

35

20

92

240

VERTICAL

AERATED CONCRETE/ AERATED CONCRETE

35

25

168

240

 

HORIZONTAL

HARDWOOD/ HARDWOOD

25

25

64

67

HORIZONTAL

HARDWOOD/ HARDWOOD

10

15

40

63

HORIZONTAL

SOFTWOOD/ SOFTWOOD

10

35

81

91

HORIZONTAL

SOFTWOOD/ SOFTWOOD

25

35

74

74

VERTICAL

HARDWOOD/ HARDWOOD

10

15

37

59

VERTICAL

HARDWOOD/ HARDWOOD

25

25

51

61

VERTICAL

SOFTWOOD/ SOFTWOOD

25

35

82

82

VERTICAL

SOFTWOOD/ SOFTWOOD

10

35

80

87

 

HORIZONTAL

STEEL/ STEEL

25

25

40

240

HORIZONTAL

STEEL/ CONCRETE

25

25

48

240

HORIZONTAL

CONCRETE/ CONCRETE

30

25

48

240

HORIZONTAL

VERMICULITE/ AERATED CONCRETE

25

25

48

240

VERTICAL

STEEL/ STEEL

25

25

58

240

VERTICAL

STEEL/ CONCRETE

25

25

52

240

VERTICAL

CONCRETE/ CONCRETE

30

25

33

240

VERTICAL

VERMICULITE/ AERATED CONCRETE

25

25

58

240

 

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