Product Overview

PRODUCT DATA SHEET
METACAULK
®
350I
Intumescent restop sealant
April 2017
1. Product Description
Metacaulk
®
350i is a one component,
general purpose fire rated sealant
and smoke seal for construction
joints and through-penetrations.
Metacaulk
®
350i is a water based,
extremely intumescent, non-sag
caulking grade sealant that is easy
to apply as well as to retrofit. It
cures to an elastomeric seal that is
suitable where dynamic movement
is expected. In the event of a fire,
Metacaulk
®
350i will prevent the spread
of flames, smoke, hot gases and water
through joint openings and through-
penetrations. No dilution or mixing is
required for use. No special skills are
necessary for installation. Metacaulk
®
350i is applied with a conventional
caulking gun, bulk loading gun or
can be troweled from the pail. For
large applications, it can be pumped
directly from the pail. Metacaulk
®
350i
systems are rated for 1, 2 and 3 hours
in accordance with the ASTM E814
(UL1479),UL 2079 and ULC-S115-95
test standards.
Metacaulk
®
350i is
protected in a wet stage as well as
in a dry stage against mold growth
with a combination of biocides.
Use Metacaulk
®
350i for various
applications:
Top of the Wall Construction Joints
Deflection Track Wall Systems
Up to 2" (51 mm)PVC/CPVC (Open)
Crosslinked Polyethylene (PEX)
tubing
Steel, Copper, Cast Iron and
EMT Pipe
Flexible Conduit
Fiberglass Insulated Pipe
Armaflex Insulated Pipe
Telephone, Communication and Power
Cables
HVAC Ductwork
Color Dark Red
Fully Cured Time 3 to 4 weeks
(at 77˚F/ 25˚C)
Density 10.5 +/- 0.5
lbs./gal.
1.25 g/cc
Elastomeric Yes
Freeze-Thaw Excellent
Skin Over Time 30 min.
(at 77˚ F/ 25˚C)
pH Value 6.5 to 7
Volume Coverage:
for 10.3 oz. tube (304ml) 18 cu. in.
(295 cc)
for 5 gallon (18.9 liter) 1155 cu. in.
(5000 cu. cm/L)
VOC Negligible
ASTM E 84, UL 723 Tunnel Test
Flame Spread 5
Smoke Index 10
Sound Transmission Class
STC 53*
*Tested in a UL 411 wall assembly/section to ASTM E90.
3. Applications
Metacaulk
®
350i can be used in interior
applications as a general purpose
fire rated sealant and smoke seal for
construction joints on both vertical and
horizontal surfaces. Metacaulk®
350i
is also an excellent fire rated acoustical
sealant and can be used in areas
under constant vibration or movement.
Metacaulk
®
350i can also be used on
For a complete list of product
applications or for additional technical
information, call RECTORSEAL for the
latest updated information.
Metacaulk
®
350i Features
• Highly Intumescent
• Water Based
• Excellent Freeze-Thaw
• Flexible Set
• Paintable
• VOC Compliant
• Safe and Easy to Use
• Minimum 3 Year Shelf Life
• Protected against mold growth
2. Material Properties
Asbestos Fillers None
Solvents None
Hazardous Ingredients None
Application Caulking
Gun or
Trowel
Application temperature
between 40˚F - 120˚F
4˚C - 49˚C
Activation of Intumescence:
Expansion Begins 375˚ F (190˚C)
Expansion Greatest 575˚ (302˚) to
1100˚ F(593˚ C)
For list of systems see metacaulk.com.