Flexible fire and acoustic rated acrylic intumescent sealant. Suitable for sealing joints, linear gaps and service penetrations. Our 5 hour fire rated sealant offers the best fire rating of all acrylic and PU sealants on the market, offering maximum protection from fire and smoke in both integrity and insulation.
With an FRL of up to -/300/300, FireMastic-300™ is unrivalled.
As an acrylic emulsion, FireMastic-300™ is simple to use and cleans up easily in water.[/vc_column_text][/vc_column_inner][vc_column_inner width="1/2"][vc_gallery type="flexslider_slide" interval="3" images="6681,6682,6683" img_size="540x390" el_class="productzoom-icon"][/vc_column_inner][/vc_row_inner][vc_row_inner content_placement="middle" gap="20" el_class="bg-section-grey pb-100"][vc_column_inner width="1/2"][vc_column_text]
Key benefits
5 hours industry leading mastic offering up to FRL of -/300/300
Acoustic reduction up to 67dB
Used for sealing linear gaps and around service penetrations such as ducts, dampers, cables and metallic pipes
Certified for use in concrete, plasterboard, masonry, AAC, Hebel, Speedpanel, Korok, AFS, Shaftliner, Dincel and timber installations
Approved to AS1530.4(2014), AS4072.1 and BS EN1366
Ensure that the gap, aperture and/or services in question are tested with BOSS FireMastic-300™ and the site conditions are within the application specification.
Ensure all surfaces are clean, dry and free from grease.
Use masking tape to provide straight edges around surfaces, if required for aesthetics.
Please refer over page under backing rod to determine of a backing rod is required.
Cut nozzle to required bead size and apply to substrate via a caulking gun. Smooth out sealant with a wet spatula within 5 minutes for professional finish.
Clean tools immediately after use with water.
Tack dry within 30mins, cures 3mm per 24hrs.
Detailed Building Product Information Datasheets Are Available from www.bossfire.com.au[/vc_column_text][/vc_column_inner][/vc_row_inner][vc_row_inner disable_element="yes" el_id="profile_options" el_class="releated_products"][vc_column_inner][vc_column_text el_class="bg-section-grey py-100"]
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[/vc_column_text][vc_row_inner][vc_column_inner width="1/3"][vc_single_image image="3183" img_size="full"][vc_custom_heading text="Potters Whitepapers" font_container="tag:h4|font_size:18px|text_align:left|color:%23323232" use_theme_fonts="yes" link="url:https%3A%2F%2Fpotters.co.nz%2Fpotters-white-papers%2F|title:Whitepapers" el_class="vc_gitem-post-data-source-post_title"][vc_column_text css=".vc_custom_1737085649400{margin-bottom: 20px !important;}"]Browse the Potter Interior System collection of white papers. Get inspired & get the specifications you need for your project.[/vc_column_text][vc_btn title="Read More" style="custom" custom_background="" custom_text="#666666" link="url:https%3A%2F%2Fpotters.co.nz%2Fpotters-white-papers%2F|title:Whitepapers"][/vc_column_inner][vc_column_inner width="1/3"][vc_single_image image="5714" img_size="350*271"][vc_custom_heading text="CAD Downloads" font_container="tag:h4|font_size:18px|text_align:left|color:%23323232" use_theme_fonts="yes" link="url:https%3A%2F%2Fpotters.co.nz%2Fcad-download%2F|title:Whitepapers" el_class="vc_gitem-post-data-source-post_title"][vc_column_text css=".vc_custom_1737087863515{margin-bottom: 20px !important;}"]Potter Interior Systems has a wide range of resources to help you complete your project. Download your CAD files today.[/vc_column_text][vc_btn title="Read More" style="custom" custom_background="" custom_text="#666666" link="url:https%3A%2F%2Fpotters.co.nz%2Fcad-download%2F|title:Whitepapers"][/vc_column_inner][vc_column_inner width="1/3"][vc_single_image image="3458" img_size="full"][vc_custom_heading text="Aluminium Specification Manual" font_container="tag:h4|font_size:18px|text_align:left|color:%23323232" use_theme_fonts="yes" link="url:https%3A%2F%2Fpotters.co.nz%2Fwp-content%2Fuploads%2F2024%2F12%2FAluminium-Partitions-Specifier-Manual_2024_1124_web.pdf|title:Whitepapers" el_class="vc_gitem-post-data-source-post_title"][vc_column_text css=".vc_custom_1737087875458{margin-bottom: 20px !important;}"]To ensure you are specifying the right partition suite for your project, view our extensive range of Aluminium Partition Suites.[/vc_column_text][vc_btn title="Read More" style="custom" custom_background="" custom_text="#666666" link="url:https%3A%2F%2Fpotters.co.nz%2Fwp-content%2Fuploads%2F2024%2F12%2FAluminium-Partitions-Specifier-Manual_2024_1124_web.pdf"][/vc_column_inner][/vc_row_inner][/vc_column][/vc_row]
[post_title] => Boss FireMastic 300
[post_excerpt] => FireMastic-300 intumescent Fire-Rated Acrylic Sealant is a one part acrylic emulsion that is designed to resist the passage of fire, smoke and sound.
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[post_modified] => 2025-01-30 04:36:55
[post_modified_gmt] => 2025-01-29 17:36:55
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Flexible fire and acoustic rated acrylic intumescent sealant. Suitable for sealing joints, linear gaps and service penetrations. Our 5 hour fire rated sealant offers the best fire rating of all acrylic and PU sealants on the market, offering maximum protection from fire and smoke in both integrity and insulation.
With an FRL of up to -/300/300, FireMastic-300™ is unrivalled.
As an acrylic emulsion, FireMastic-300™ is simple to use and cleans up easily in water.
Key benefits
5 hours industry leading mastic offering up to FRL of -/300/300
Acoustic reduction up to 67dB
Used for sealing linear gaps and around service penetrations such as ducts, dampers, cables and metallic pipes
Certified for use in concrete, plasterboard, masonry, AAC, Hebel, Speedpanel, Korok, AFS, Shaftliner, Dincel and timber installations
Approved to AS1530.4(2014), AS4072.1 and BS EN1366
Highly flexible, up to 40% movement
High yield so installation material costs and labour are both decreased
Gap widths up to 50mm
Available in standard colours of grey and white, other colours available upon request
Widely adaptable to seal around other passive fire products such as dampers, pillows, collars and batts
Can be painted once cured
Installation
Ensure that the gap, aperture and/or services in question are tested with BOSS FireMastic-300™ and the site conditions are within the application specification.
Ensure all surfaces are clean, dry and free from grease.
Use masking tape to provide straight edges around surfaces, if required for aesthetics.
Please refer over page under backing rod to determine of a backing rod is required.
Cut nozzle to required bead size and apply to substrate via a caulking gun. Smooth out sealant with a wet spatula within 5 minutes for professional finish.
Clean tools immediately after use with water.
Tack dry within 30mins, cures 3mm per 24hrs.
Detailed Building Product Information Datasheets Are Available from www.bossfire.com.au
Product Downloads
Detailed information is provided on product specific datasheets referenced below.
Designed to prevent the spread of fire + smoke from one compartment to another where electrical, data and comms cables penetrate through walls and floors.
