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Application

For fire protection of construction, contraction and expansion joints within stadia terracing (due to high Shore A hardness), floors, curtain walling and building façades.

Description

A fire rated modified silane (MS) based sealant which cures quickly and provides good adhesion to most building materials. When subjected to fire, Flamex MS320 forms a stable insulating char which provides protection to the remaining sealant. Heat, flames and smoke are prevented from passing through the joint to adjacent areas of the structure. 


Features and benefits:

  • Tested in accordance with BS 1366-4.
  • Up to a 5 hour fire rating in specified joint configurations.
  • High modulus trafficable sealant.
  • Prevents the passage of smoke through joints in fire conditions.
  • In the form of a thixotropic paste. 
  • Can be applied to concrete or mild steel substrates.
  • Available in 600 ml sachets.

General information

Color

Grey

Finish

Smooth

Material

Modified silane (MS)

Shape

Formless

Length

Bespoke

Width

Bespoke

Height

Bespoke

Uniclass

Pr_30_31_76_40 Intumescent firestop sealantsPrimary

CAWS

H42/661 Sealant joints

H42/661 Sealant joints

E40/530 Sealant

E40/530 Sealant

Specification data - Intumescent firestop sealants

Material

Modified silane (MS).

Fire performance

-

Fire resistance

To BS 1366-4 in expansion joints, up to 5 hours (300 minutes).

Guidance for specification option:

Dependent on wall construction and joint size, consult manufacturer's literature for more information.

Cure speed

2 mm per day (23°C at 50% RH).

Application temperature

5–30°C.

Shore A hardness

40.

Joint width

For joint widths of: 6–25 mm (joint design - wall). 6–30 mm (joint design - floor).

Guidance for specification option:

For wall joints 6–12 mm wide, a depth of 10 mm is required. 

For wall joints 13–25 mm wide, a depth of 15 mm is required.

For floor joints 6–12 mm wide, a depth of 10 mm is required. 

For floor joints 13–20 mm wide, a depth of 15 mm is required.

For floor joints 21–30 mm wide, a depth of 20 mm is required.

Movement

20% butt joints (at 1:1 width/ depth ratio).

Manufacturer guidance

Movement accommodation factor (MAF) 

Flash point

>100°C.

Solubility in water

Insoluble in water.

Pressure

<0.001 kPa (at 20°C).

Manufacturer guidance

Vapor pressure

Density

1.42 (at 20°C).

Manufacturer guidance

Relative density

Sustainability data

Material

Modified silane (MS)

Literature

Fosroc® Flamex MS320 Technical Data Sheet

Fosroc® Flamex MS320 Technical Data Sheet

Fosroc® Flamex MS320 SDS

Fosroc® Flamex MS320 SDS