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Sealants
Metacaulk MC 150+ Firestop Sealant
Single component, general purpose firestop sealant for a wide range of applications. Tested per ASTM E814 (UL 1479) and ASTM E1966 (UL 2079) for up to 4-hour fire resistance. Non-sag, flexible cure with excellent sound control (STC 65). Available in Red, Gray, and White.
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UL-Classified SystemsComponents of tested UL firestop systems
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Authorized DistributorGenuine Metacaulk® / RectorSeal
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TDS & SDSFull technical documentation
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Same-Day ShippingOrder by 11 AM CST
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Spec & Submittal SupportCode & system help
Key features
- UL Classified systems up to 4 hours
- Flexible cure, non-sag, elastomeric seal
- Mold inhibitor — zero fungal growth (ASTM G21)
- VOC compliant — CDPH Standard Method v1.2, <10 g/L
- STC Rating 65 (ASTM E90) for superior sound control
- 3-year shelf life, excellent freeze-thaw
- Available in Red, Gray & White
Typical applications
- Metallic pipes
- combustible pipes
- insulated pipes
- construction joints
- air ducts
- single & bunched cables
- bus bars
Technical data
| VOC | <10 g/L |
|---|---|
| Color | Red, Gray & White |
| Application Temp | 40°F–120°F |
| Density | 1.5 g/cc |
| Chemical Base | Water Based Acrylic |
| Cure Time | 3–4 weeks |
| Skin Time | 30 min @ 77°F |
| STC Rating | 65 |
| Viscosity | 300,000 cp |
| Smoke Index | 10 |
| Flame Spread | 10 |
| Coverage Rate | 1/4 in. bead = 62 linear feet |
Installation overview
- Clean all contact surfaces free from loose debris and contaminants
- Install required backing material per detailed instructions or approved system
- Apply Metacaulk 150+ to required parameters, ensuring contact with all surfaces
- Tool sealant to a defect-free finish using a wetted trowel or putty knife
- Clean all equipment with water immediately after use