Watertight Expansion Joints and Construction Sealants by EMSEAL


Silicone-coated, pre-compressed, primary seal for rapid installation into small vertical and horizontal joints

A building joint sealant, Colorseal-On-A-Reel (COR) is a cost-effective version of EMSEAL’s industry-standard Seismic Colorseal precompressed primary seal shipped on a reel for rapid installation into small joints. It ensures watertightness in vertical or horizontal structural and abutment joints in virtually any substrate. Reel-packaging, in contrast to ‘stick’ packaging:  reduces waste, lowers production costs, makes handling easier, and installation rapid. Colorseal-On-A-Reel is a tensionless solution to small joint sealing and is half the price of similarly sized ‘stick’ Colorseal. Its installed-cost makes COR a cost-effective alternate to ‘caulk and backer rod’. And COR not only seals out water, it seals out air, heat, cold, and sound as well.

Colorseal-On-A-Reel replaces traditional liquid sealant and backer rod in the typical “caulk and backer rod” configuration that relies for performance on the difficult-to-achieve ‘hour-glass’ shape. In doing so, COR eliminates the primary reason for sealant joint failure – tension – at the bondline and within the cured liquid sealant. COR installs rapidly and eliminates many of the myriad steps required to achieve a neat, functioning joint seal using liquid sealant and backer rod.  No grinding, priming, backer rod insertion, masking, mixing, or tooling.


Silicone-coated, pre-compressed, primary seal for rapid installation into small vertical and horizontal joints


  • Tensionless, pre-cured silicone primary seal
  • Cost effective
  • Shipped on 10-foot reels
  • Smooth convex surface
  • Rapid installation–new or retrofit
  • No priming, masking, mixing, tooling or backer rod placing
  • Watertight
  • Airtight
  • Insulates
  • Sound attenuating
  • ABAA Compliant
  • Resists hurricane force wind & water
  • Aesthetically and practically versatile
  • Easily handles changes in plane and direction
  • Conforms to substrate irregularities
  • Easily handles curved joints


  • Nominal Sizes: 1/2″, 3/4″, 1″, 1 1/4″ (12, 20, 25, 30 mm)
  • Depth of Seal: 1 3/4″ (45mm)
  • Quantity Per Reel: 10 – LF


Total 80% (+30% and -50%) of nominal supplied size.


A wide rage of standard colors and custom colors are available.


Alternative to caulk and backer rod in smaller control joints and building component joints in:

  • Tilt-up walls
  • Precast concrete
  • CMU
  • Curtainwall
  • Masonry
  • Metal Panel
  • Natural Stone
  • Window perimeters
  • Shelf angles
  • Sidewalks
  • Driveways
  • Residential garage to driveway thresholds
  • Pool copings, etc.

Watertight—the tensionless silicone bellows is installed just below the deck surface. This ensures watertightness is achieved at the deck surface.

Non-Invasive Anchoring—there are no hard metal-to-concrete connections in the system. This includes embedded pins, anchors, screws, bolts or tracks, trays or rails. The system is locked to the joint faces by means of the 1) backpressure of the foam, 2) the epoxy adhesive, and 3) the injected silicone sealant band at the joint face to foam and silicone bellows interface.

Continuity of Seal—as in all EMSEAL expansion joint systems, continuity of seal through changes in plane and direction is an essential performance differentiator. Details for watertight, field-fabricated transitions from deck to wall, at curbs, sidewalks, parapets, tees, and crosses are available with the DSM SYSTEM.

Aesthetics & Versatility—Standard color is gray (other colors available), uniform bellows appearance, double sealing, fuel resistance, and an enhanced ability to handle variations in joint size are among other system features.

  • Produced by infusing a cellular foam base material with a hydrophobic, microsphere-modified acrylic impregnation, and coating the surface with a high-performance silicone to suit the application.
  • The external silicone facing is factory applied to the foam at a width greater than maximum joint extension and is cured before final compression.
  • Silicone application and curing takes place in a temperature and humidity-controlled factory environment. This ensures, in contrast to field applied liquid sealant and backer rod installations, that no movement takes place during curing that can cause deformation or stresses in the sealant material.
  • The material is precompressed to less than the joint size for easy insertion.
  • When compressed, a bellows is created in the coating. As joint movement occurs the bellows simply folds and unfolds free of tension on the bond line, and virtually free of tensile stresses in the silicone material.
  • The material is supplied in 6.56 LF (2m) shrink-wrapped lengths (sticks). After removal from the shrink-wrap and hard board restraining packaging, it expands gradually.
  • The foam provides a resilient backing to the silicone coating, making the system capable of resisting reasonable transient point loads.
  • Substrates must be parallel, plumb, have sufficient clear depth to receive the material specified, and be capable of resisting approx. 2.5 psi backpressure from the foam.
  • Fuel Resistance: Silicone sealant is not degraded by contact with fuel. Some swelling of the material will normally occur, but it will return to its original shape upon evaporation of the fuel.
  • As with any construction product, the useful life of the material can be maximized with routine inspection and repair if required.
  • Clearing of surface debris and inspection will reveal any damage to the product or adjacent substrates that might affect building performance.
  • EMSEAL precompressed sealants are easily repaired–requiring only damaged sections to be removed and reinstalled–not the entire length of the joint as is typical of extruded-seal systems.
  • Available for shipment internationally.
  • Prices are available from local distributors or representatives. For more information, contact EMSEAL.
  • The product range is continually being updated, and accordingly EMSEAL® reserves the right to modify or withdraw any product without prior notice.