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• Features & Benefits
• Application Notes
• Limitations

Features & Benefits

• Extensively fire tested in accordance with BS 476 Pt:20: 1987
• Under fire conditions Flamex One and Flamex Two intumesce, forming a foam-like structure which insulates and provides a barrier to hot gas and flame
• Fire tested in overhead joints as well as in wall joints
• Over 4 and 5 hours insulation and longer integrity rating, depending on joint design
• Suitable for fire stopping of joints as defined by Approved Document B of the Building Regulations
• Prevents the passage of smoke through joints under fire conditions
• Effective as normal building sealants and allows structural movement
• Flamex Two is also resistant to a range of chemicals.
• Flamex Two has a movement accommodation factor of 25% for high movement situations
• Please refer to the Product Data Sheet for full details of:
  • Fire Performance Test Data
  • Properties
  • Maintenance
  • Priming
  • Mixing
  • Application Instructions
  • Coverage
  • Cleaning
  • Storage
  • Health and Safety

Application Notes

• The Flamex sealant shall be backed or supported with Fosroc Expandafoam Cord, Fosroc Hydrocell XL, a ceramic strip or a bond breaker tape
• The choice will be dependent upon the performance level required and the type of joint being sealed
• Priming: Fosroc Flamex S Primer and Fosroc Primer P7 are required and should be used as follows:

Fosroc Flamex S Primer:

• For all non-porous surfaces

Fosroc Primer P7:

• For all porous surfaces such as concrete, stone, brickwork, blockwork and timber
• Apply by brush, working in well, ensuring complete coverage
• Avoid over priming resulting in an excess of primer in the base of the joint or beyond the joint faces
• The mixed Flamex Two should be applied when Fosroc Primer P7 is tack free, normally within 20 minutes to 1 hour — that is after the evaporation of the solvent but before the primer film has completely reacted
• After 3 hours the surfaces must be re-primed before applying the sealant
• Excessively porous surfaces may need a second coat, applied over the first coat which must be thoroughly dry

Mixing:

• Flamex Two base component and curing agent are supplied ready for mixing in a single tin
• Mix thoroughly using a slow speed drill (300 to 500 rpm) fitted with a Fosroc Sealant Mixing Paddle for 5 minutes
• Immediately after mixing, load the sealant into a Fosroc ‘G’ Gun using a Follower Plate and apply to the joint

Please see the Product Data Sheet for detailed information.

Limitations

• The fire rating of Flamex sealants is specific to the tests quoted on the Product Data Sheet
• Users should satisfy themselves that the test results are applicable to their own installations
• Over-painting of Flamex sealants is not recommended
• Refer to Fosroc Technical Department for chemical resistance of Flamex Two
  
  • Spillages must be cleaned from the sealants as soon as is practical
• Flamex sealants should not be used in direct contact with materials containing pitch or bitumen or in situations where water cannot freely drain away
• Clean equipment using Fosroc Equipment Cleaner

IMPORTANT FIRE PRODUCTS NOTICE: The information displayed on this website should be used as a guide ONLY and our Technical Department should be contacted to obtain a tailored specification and any advice necessary before you place an order for fire protection products. Fire protection products are non-returnable except in accordance with Condition 8 of the Terms and Conditions and should be applied only by an individual with the necessary expertise and experience. We will not be held liable for any resulting damage to property, human life or monetary costs incurred due to the incorrect specification you have prepared or use of fire protection products caused by your negligence, including your failure to have contacted us to obtain the relevant advice/specification.