Product Description The DSM SYSTEM builds on a track record of over 30 years of sealing horizontal plane and below-grade expansion joints with impregnated foam sealants. The system is comprised of: 1) Pre-compressed, silicone-and-impregnated-foam hybrid installed into... 2) field-applied epoxy adhesive on the joint faces; with the silicone bellows locked to the joint faces with... 3) a silicone sealant band (see Figure 1). The DSM SYSTEM features an innovation in sealant technology in the form of a innovative, patented microsphere-modified acrylic adhesive infused into the cellular foam base material. DSM features sealing performance significantly greater than any impregnated pre-compressed predecessor. In addition, it is odorless, clean handling, UV stable, non-staining, and features low temperature flexibility not previously available in asphalt, wax, or isobutylene-based predecessors. The result is extension of the usability of the product to applications where asphalt or wax-based predecessors did not work well under conditions of thermal shock (rapid opening and closing of joints during large temperature swings). These applications include joint-face adhered installations on top decks as well as intermediate decks. The DSM SYSTEM has an extensive track record of service throughout the world. It has been widely adopted as the replacement for virtually all applications where older, inflated, "jeene"-type systems were once favored. In contrast to the inflated seals, the DSM SYSTEM remains in compression over its life. As a result it is not subject to failure due to excessive tension on the bond line.
Features Explained 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.