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Dowsil 3-6548 Silicone Foam

DOWSIL 3-6548 RTV Silicone Foam with fire resistance

Dowsil 3-6548 RTV Silicone Foam is a two part, medium densitysilicone rubber foam for sealing fire rated penetrations.

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DOWSIL 3-6548 RTV Silicone Foam with fire resistance

Dowsil 3-6548 RTV Silicone Foam consists of two liquid components; A and B. When both components are mixed thoroughly in a 1:1 ratio by weight or volume, the product will expand and cure to a formed elastomer at room temperature. 

Dowsil 3-6548 RTV Silicone Foam prevents smoke and gas penetrating through seals and forms to complex, irregular shapes.

The foam is resistant to temperature extremes, ozone, and UV radiation.


  • It is designed for sealing fire rated penetrations containing pipes, cables or ductwork.

For pack sizes, please see Additional Information. 


  • Room temperature cure
  • Reversion resistance
  • Non-corrosive
  • Fire resistance

Regulations / Approvals

  • Meets HL3/R22 of the EN45545 rail regulation

This product is part of the DOWSIL range

Please be advised

As COVID-19 continues to impact many industries, companies and their day-to-day processes, we would like to assure you that Antala Ltd is classified as an “Essential Business” and is open for business as usual. 

We have implemented our continuity plan to maximise the safety of our employees while still providing critical support, sales, and fulfilment services to our domestic and international customers. 

Please contact us via phone, website or email 

We wish you the best during this difficult period.