Product Overview

PRODUCT DATA SHEET
METACAULK
®
835+
Elastomeric, Silicone restop sealant
December 2017
Metacaulk
®
835+ is a one component,
fire-rated elastomeric neutral, moisture
cure silicone sealant for use in through-
penetration firestops. Available in two
grades caulk grade and self leveling. In
the event of a fire, Metacaulk
®
835+ will
prevent the spread of flames, smoke,
gas and water through penetration open-
ings. Metacaulk
®
835+ is a flexible, non-
slumping sealant with excellent moisture
resistance. For use in interior or exterior
expansion and control joints and interior
or exterior penetrations. Because Meta-
caulk
®
835+ is silicone based, it can be
used in systems where dynamic move
-
ment is expected. Metacaulk
®
835+ is
protected in a wet stage as well as in
a dry stage against mold growth with
a combination of biocides.
Use Metacaulk
®
835+ for various pen-
etrations:
EMT, Semi-Rigid, and Rigid Conduit
Steel Pipe
Wall to Decking Transition Joints
Wall to Floor Transition Joints
Wall to Wall Control Joints
Floor to Floor Control Joints
Metacaulk
®
835+ Features
* A single component penetration seal-
ant system - no mixing necessary and
no required additives.
* Use in Interior or Exterior Expansion,
Contraction and Control Joints.
* Use in Exterior and Interior Penetra
-
tions.
* Neutral, Moisture Cure
* DOT Classification is Not Regulated.
* Non-Slump Formula.
* Applied with a conventional caulking
gun, trowel or with pumping equip
-
ment.
* A special purpose firestop sealant.
Metacaulk
®
835+
2. Material Properties
Asbestos Fillers None
Application S t a n d a r d
10.15 oz (300
ml) Caulking
Tubes, 20.2
oz & 5 Gallon
(18.9 L) Pails
Color Gray
Cure Time 21 Days
Elongation at 600%
Break (ASTM D412)
Volatile Solvents None
Volume Coverage
(cu in/10.15 oz tube) 18
(cu cm/300 ml) 295
(cu in/gal) 231
(cu cm/L) 1000
Working Time 5-15 min.
(caulk grade)
Specific Gravity 1.33
Dielectric Strength 479 V/mil
(ASTM D149) (19.0 kV/mm)
ASTM E 84, UL 723 Tunnel Test
Flame Spread Index 3
Smoke Index 22
Service Temp Range -60˚F to 300˚F
(ASTM C1299) (-51˚C to 149˚C)
Metacaulk
®
835+ meets ASTM C920,
Type S, Grade NS, Class 25, Use NT, M, G, A,
O
and Can/CGSB-19.13-M87, Class
MCG-2-40-A-L.
Sound Transmission Class
STC 55*
*Tested in a UL 4121 wall assembly/section to ASTM E90.
3. Applications
Metacaulk
®
835+ caulk grade is used
to seal wall and floor penetrations for
electrical, plumbing, pipe and telephone
communication systems penetrations.
Non-Slump Metacaulk
®
835+ formula is
used in vertical and horizontal applications.
Use Metacaulk
®
835+ to prevent the spread
of fire through fire rated gypsum wallboard
partitions, concrete block or concrete walls
and concrete floors. Self leveling is used
for curtain wall and floor joint applications.
4. Installation Data (typical)
Install Metacaulk
®
835+ using standard
caulking techniques or trowel from pails.
TYPICAL GYPSUM WALLBOARD IN-
STALLATION
Step 1) Cut opening in floor or wall.
Step 2) Clean penetration opening and
surfaces from loose debris, dirt, oil and
wax.
Step 3) Install wire mesh if required. Form
wire mesh into cylinder to match hole di-
ameter. Slip wire mesh inside wall along
penetrating item and allow mesh to spring
back against hole.
Step 4) Install backing material if required.
Step 5) Gun the sealant as required to
the specified depth. Trowel surface flush
with wall.
(Application designs vary, please contact
The RectorSeal Corporation for exact
details.)
Consult UL Directory for complete instruc-
tions and system listings.
1. Product Description
For list of systems see metacaulk.com.