field-injected silicone sealant bands
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EMSEAL JOINT SYSTEMS, LTD 25 Bridle Lane, Westborough, MA 01581
EMSEAL, LLC 120 Carrier Drive, Toronto, ON, Canada M9W 5R1
PH: 508.836.0280 FX: 508.836.0281
PH: 416.740.2090 FX: 416.740.0233Toll Free: 1-800-526-8365
Copyright © 2015 by EMSEAL JOINT SYSTEMS, LTD. All Rights Reserved
DATA
TECH
DSM SYSTEMWatertight Joint System for Decks and
Below-Grade Walls
DSM SYSTEM TECH DATAJANUARY 2015, PAGE 1 OF 2
Figure 1: DSM SYSTEM in Typical Installation--New or Retrofit
Product Description
The DSM SYSTEM builds on a trackrecord of over 30 years of sealinghorizontal plane and below-grade jointswith impregnated foam sealants.
The system is comprised of:1) Precompressed, sil icone-and-impregnated-foam hybrid installed into2) field-applied epoxy adhesive on thejoint faces; with the silicone bellowslocked to the joint faces with3) a silicone sealant band(see Figure 1).
The DSM SYSTEM features an innovationin sealant technology in the form of apatent-pending acrylic adhesive infusedinto the cellular foam base material.This new chemistry incorporates ahydrophobic microsphere componentnever before available in a sealantformulation.
The material features sealingperformance significantly greater thanany acrylic impregnated predecessor.In addition, it is odorless, cleanhandling, UV stable, non-staining,and features low temperatureflexibility not previously available inasphalt, wax, or isobutylene-basedpredecessors.
The result is extension of the usability ofthe product to applications where asphaltand wax-based predecessors did notwork well under conditions of thermalshock (rapid opening and closing ofjoints during large temperature swings).These applications include joint-faceadhered installations on top decks aswell as intermediate decks.
Suitabil ity is further extended tohorizontal-plane joint applications incolder geographical regions to whichasphalt and wax-based predecessorshave not previously been recommended.
Features
Watertight—the tensionless siliconebellows are installed just below the decksurface. This ensures watertightness isachieved at the deck surface.
Non-Invasive Anchoring—there areno hard metal-to-concrete connectionswith the DSM SYSTEM. This includesembedded pins, anchors, screws, boltsor tracks, trays or rails. The system islocked to the joint faces by means of the1) backpressure of the foam; 2) theepoxy adhesive, and 3) the injected
www.emseal.com
silicone sealant band at the joint face tofoam and silicone bellows interface.
Continuity of Seal—as in all EMSEALexpansion joint systems, continuity ofseal through changes in plane anddirection is an essential performancedifferentiator. Details for watertight,field-fabricated transitions from deck towall, at curbs, sidewalks, parapets, tees,and crosses are available from EMSEAL.
Movement Capability+30% and -25% (Total 55%) of nominalmaterial size (see "Performance").
Aesthetics & Versatility—Standardcolor is gray (other colors available),
®
uniform bellows appearance, fuelresistance, and an enhanced ability tohandle variations in joint size are amongother system features.
Performance
• Capable, as a dual-seal, of movementsof +30%, -25% (55% total) of nominalmaterial size. DSM will remainwatertight up through movements of+50% of nominal material size withthe silicone bellows providing thewaterproofing, but at these levels ofextension use should be limited towhere no direct pedestrian or highpoint-load traffic is possible--as in deck-to-wall conditions or where the DSMSYSTEM is protected by a coverplate.
Note: For material sizes 1 -1/4 -inch (30 mm) and less, a smooth, convex, single-bellow
coating is supplied.
Uses
• Ideal for new construction and retrofit of old or failed joint systems in concreteor in embedded metal angles where demolition and removal of the metal anglesis not feasible or affordable.
• Ideal for lasting replacement of tee-to-tee caulk joints in precast parking decksand stadiums or where pedestrian or vehicular traffic is expected.
• decks • runways • stadiums • mall bridge connectors• parking decks • airport aprons • arenas • below-grade walls• roadways • sidewalks • ice-floors • tunnel walls
• stair towers • perimeter joints
3) FIELD-INJECTED SILICONE
SEALANT BANDS (Silicone
supplied by EMSEAL)
2) EPOXY ADHESIVE AT
JOINT FACE
(Epoxy supplied by EMSEAL)
1) DSM MODIFIED-ACRYLIC
IMPREGNATED FOAM
FACTORY-APPLIED AND
CURED SILICONE BELLOWS*
FACING
Figure 2: DSM SYSTEM in Existing Steel Angles--Retrofit
EXISTING STEEL
ANGLES WHERE
REMOVAL IS NOT
FEASIBLE OR
AFFORDABLE
DAMAGED CONCRETE
AT BACK EDGES OF
EMBEDDED ANGLES
ROUTED AND SEALED
(BY OTHERS)
EMSEAL JOINT SYSTEMS, LTD 25 Bridle Lane, Westborough, MA 01581
EMSEAL, LLC 120 Carrier Drive, Toronto, ON, Canada M9W 5R1
PH: 508.836.0280 FX: 508.836.0281
PH: 416.740.2090 FX: 416.740.0233Toll Free: 1-800-526-8365
DSM SYSTEM TECH DATADECEMBER 2013, PAGE 2 OF 2www.emseal.com
Composition
• DSM is produced by coating animpregnated cellular foam withhighway-grade silicone.
• The silicone external facing is factoryapplied to the foam at a width greaterthan maximum joint extension and iscured before final compression.
• Silicone application and curing takesplace in a factory-controlledenvironment. In contrast to fieldapplied liquid sealant and backer rodinstallations, no movement takes placeduring curing that can causedeformation or stresses in the material.
• When compressed, a bellows is createdin the coating. As joint movementoccurs the bellows simply folds andunfolds free of tension on the bondline,
and virtually free of tensile stressesin the silicone material.
• The foam provides a resilient backingto the silicone coating, making thesystem capable of resistingreasonable transient point loads (seePerformance).
• DSM SYSTEM is supplied in 6.56 LF(2m) shrink-wrapped lengths (sticks).It is precompressed to less than thejoint size for easy insertion. Afterremoval from the shrink-wrap andhard board restraining packaging, itexpands gradually.
Installation
IMPORTANT: The following instructionsare a summary. Refer to "DSM SYSTEMInstall Data" and job-specificinstructions of an EMSEAL technicianfor complete procedures.• Store indoors at room temperature.
Expansion is quicker when warm,slower when cold.
• Ensure material nominal size matchesjoint size.
• Mix epoxy and trowel a thin layeronto the joint faces to at least thedepth of the DSM foam
• Apply a thin layer of epoxy to bothsides of the joint face.
N/AN/A
ASTM D3574 EASTM D3574 EASTM C711
ASTM G155-00A
ASTM G155-00A
COLOR
Percent Solids (minimum)SPECIFIC GRAVITY
Following tests conducted on Sealant Cured after 21 days at25°C (77°F) and 50% RH:ELONGATION PERCENT MINIMUM
Joint Modulus at 50 percent Elongation, psi (kPa) maximumJOINT MODULUS AT 100 PERCENT ELONGATION, PSI (KPA) MAXIMUM
Joint Modulus at 150 percent Elongation, psi (kPa) maximumADHESION TO CONCRETE, MINIMUM PERCENT ELONGATION
Adhesion to Asphalt, minimum percent ElongationJOINT MOVEMENT CAPABILITY, +100/-50 PERCENT, 10 CYCLES
WeatherabilityFLEXIBILITY
CELLULAR, HIGH DENSITY, POLYURETHANE FOAM
Proprietary, modified, water-based, acrylic
22.3 PSI MIN (153 KPA)157% min
185°F (85°C)-40°F (-40°C)NO CHANGES--2000 HOURS
NO CHANGES--2000 HOURS
BASE MATERIAL
Impregnation
TENSILE STRENGTH
Elongation - ultimateTEMPERATURE SERVICE RANGE
HIGH
LOW
UV RESISTANCE
(Accelerated Weatherometer)
RESISTANCE TO AGING
Bleeding:-40°F to 180°F (-40°C to 85°C)
COMPRESSION SET
Property Value
Table 1: Typical Physical Properties of DSM Foam
Property Value
Table 2: Typical Physical Properties of Silicone Coating
DARK GRAY
961.26 - 1.34
14007(48)8(55)9(62)+600+600NO FAILURE
Unaffected by climatic extremesCURED SEALANT STAYS RUBBERY FROM -45 TO
149°C (-50 TO 300°F)
Test Method
1 1/2"(40mm)
1-1/2"(40mm)
2"(50mm)
2"(50mm)
2 1/2"(65mm)
2-1/2"(65m)
2-1/2"(65mm)
2-1/2"(65mm)
2-3/4"(70mm)
2-3/4"(70mm)
3-1/4"(80mm)
3-1/2"(90mm)
3-1/2"(90mm)
3-1/2"(90mm)
3-1/2"(90mm)
5-1/2"(140mm)
6"(150mm)
Depthof Seal
Nominal Material Size(Joint Size at Mean T°F)
1/2"(12mm)
3/4"(20mm)
1"(25mm)
1-1/4"(30mm)
1-1/2"(40mm)
1-3/4"(45mm)
2"(50mm)2-1/4"
(55mm)
2-1/2"(65mm)
2-3/4"(70mm)
3"(75mm)
3-1/4"(85mm)
3-1/2"(90mm)
3-3/4"(95mm)
4"(100mm)
5"(125mm)
6"(150mm)
Table 4: DSM SYSTEM Sizing
Table 3: Approximate Volume Change of Silicone Coating after Exposure to Fluids:
Silicone Joint Sealant5-20 PERCENT
NoneNONE
None
FluidJP-4Skydrol B50/50 GLYCOL/H2OHydraulic Fluid
Percent Volume Swell - Visual
AFTER DRYING, ALL SAMPLES PASSED +100/-50% MOVEMENT TESTING.
• Remove shrink-wrap packaging andhardboard. Allow partial expansion untilsnug when inserted into epoxied joint faces.
• Insert material into joint until bellows isflush with (below-grade or deck-to-wall) orrecessed by 1/4" (6mm) in trafficapplications.
• Join lengths by pushing silicone coatedends firmly together.
• Wipe silicone facing using clean,lint-free rag made damp with solvent.
• Before the epoxy cures, force the tip of thesealant tube between the foam and thesubstrate and inject a silicone sealant band.Tool overflow sealant into a cove beadbetween the top of the silicone bellows andthe substrate. Tool silicone between joinedlengths so that bellows is not restrained byexcess silicone.
Warranty
Standard or project-specific warranties are
available from EMSEAL on request.
CAD Details & Guide Specs
Guide specifications and CAD details are
available at www.emseal.com.
Availability & Price
DSM SYSTEM is available for shipment
internationally. Prices are available from
local representatives and/or directly from
the manufacturer. EMSEAL® reserves the
right to modify or withdraw any product without
prior notice.
Max. Joint(opens to)
Min. Joint(closes to)
5/8"(16mm)
15/16"(24mm)
1-1/4"(30mm)
1-5/8"(42mm)
2"(50mm)
2-1/4"(55mm)
2-5/8"(67mm)
2-7/8"(73mm)
3-1/4"(85mm)
3-1/2"(90mm)
3-7/8"(98mm)
4-1/4"(110mm)
4-1/2"(115mm)
4-7/8"(120mm)
5-1/4"(135mm)
6-1/2"(165mm)
7-1/8"(180mm)
3/8"(10mm)
9/16"(14mm)
3/4"(20mm)
7/8"(22mm)
1-1/8"(28mm)
1-1/4"(30mm)
1-1/2"(40mm)
1-5/8"(42mm)
1-7/8"(47mm)
2"(50mm)
2-1/4"(55mm)
2-1/2"(65mm)
2-5/8"(67mm)
2-3/4"(70mm)
3"(75mm)
3-3/4"(95mm)
4.5"(115mm)
Copyright © 2015 by EMSEAL JOINT SYSTEMS, LTD. All Rights Reserved
(see “Performance” for movement capabilities & limitations)
No bleeding when compressed to minimum of claimedmovement i.e. -25% of nominal size and when simulateouslyheated to 180°F (85°C) FOR 3 HOURS
MATERIAL RECOVERS TO +30% OF NOMINAL SIZE WITHIN 24 HOURS OF COMPRES-SION TO -25% AND SIMULTANEOUS HEATING TO 180°F (85°C) FOR 3 HOURS
• Substrates must be parallel, plumb andcapable of resisting approx. 2.5 psibackpressure from the foam.
• Standard sizes from 1/2" (12mm) to 6"(150mm). Other sizes available subjectto review of application: consultEMSEAL.
• Fuel Resistance: Silicone sealant is notdegraded by contact with fuel. Someswelling of the material will normallyoccur, but it will return to its originalshape upon evaporation of the fuel.
• Sizes in excess of 4” consult EMSEAL• For sizes not shown consult EMSEAL.• Select nominal material size to correspond to joint-gap size
at mean temperature.• Material supplied in shrink-wrapped sticks of 6.56 ft. (2 M).
EMSEAL_DSM_TD_01-09-2015
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