Primary recommendation
FR880 Fire-Resistant Silicone Sealant
Neutral-cure silicone for fire-resistant joints and penetrations selected as part of the complete tested assembly.
Sealant Application Guide
Fire-Resistant Sealing Systems
Fire-resistant construction depends on the complete tested joint or penetration system, not the sealant alone. FR880 is designed for joints around glazed fire-door systems, smoke-exhaust or service penetrations and fire-compartment walls. Match the product to the required rating, joint type, substrates and complete assembly before specification.
Recommended Vesta products
Start with the product matched to the joint exposure, then confirm substrate compatibility and project requirements.
Where this application fits
Use the scene first to identify the joint, then check the substrate, exposure and movement below.
Stainless-steel glazed door systems
Door-frame, glazing and perimeter joints matched to the specified fire-separation assembly.
Smoke-exhaust shafts and flues
Mechanical smoke-exhaust ducts and shaft interfaces within complete penetration systems.
Fire-compartment walls
Wall perimeters, junctions and service openings matched to the specified fire-wall assembly.
- Glazed fire-door and partition perimeters
- Stainless-steel framed glazed systems
- Smoke-exhaust duct and shaft penetrations
- Fire-compartment wall perimeter joints
- Selected interior and exterior fire-resistant joint systems
Common substrates
- Concrete and masonry assemblies
- Compatible metal framing and sleeves
- Project-defined cable, duct and pipe penetrations
- Approved backing and joint-fill materials
- Adjacent sealants or coatings after compatibility review
Key performance requirements
- Tested system scope matching the actual joint or penetration
- Required fire-resistance duration and test method identified
- Joint width, depth, movement and backing matched to the report
- Adhesion and compatibility confirmed on the actual materials
- Installation and inspection records aligned with the approved system
Product selection guidance
Choose by service condition
Start with the required fire-resistance duration, test method, joint or penetration type, substrates, opening dimensions, movement and backing materials. Use FR880 only where the system documents cover the intended assembly. A product label or isolated material property does not establish a system rating.
Before Application
Application considerations
- Obtain the project firestopping or fire-joint specification before product selection.
- Match the actual opening, substrates, services, backing and sealant depth to the available tested system.
- Confirm whether movement is expected and whether the selected system covers that movement.
- Keep the applicable report, installation details and inspection records with the project file.
- Do not substitute components within a tested assembly without written technical confirmation.
Common Questions
Frequently asked questions
Does FR880 give every joint the same fire rating?
No. The rating depends on the complete tested assembly, including the substrates, opening, services, backing, sealant dimensions and test method. Confirm that the available documentation covers the intended system.
Can FR880 be used around cable or duct penetrations?
FR880 can be used in specified cable, duct or service penetration systems when the complete tested assembly covers the exact penetration type.
Can an ordinary movement-joint detail be reused in a fire separation?
Do not assume that it can. The fire-separation joint needs a tested or otherwise approved system covering the actual movement, joint geometry, substrates and backing materials.
What should I send for a fire-resistant sealant review?
Send the required standard or test method, rating duration, wall or floor construction, opening dimensions, service type, expected movement, backing materials and destination market.
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