Uses

Features a silicone-bellows sealing surface and an precompressed, impregnated foam backing, the DSF System provides a lasting solution to joint sealing applications and will not pose a contamination risk to liquids or solids which may be ingested.

The silicone bellows is compliant to NSF/ANSI Standard 61 for contact with potable drinking water. They are also in compliance with FDA Regulation CFR 177.2600 for indirect contact with food.

The system is comprised of (see Figure 1) precompressed, silicone-and-impregnated-foam hybrid installed into field-applied epoxy adhesive on the joint faces with the silicone bellows locked to the joint faces with a silicone sealant band.

For submerged applications subject to hydrostatic-head pressure see Submerseal.
 

Features

Non-Invasive Anchoring — there are no hard metal-to-substrate connections with the DSF 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.

Color: The standard DSF SYSTEM color is off-white

Versatility — Variations in joint size can be handled through size-switching.

Substrates must be solid, parallel, plumb, free of any contaminants, and capable of resisting approximately 2.5 psi backpressure from the foam.

For continuous immersion or potable water submersion applications -- see Submerseal.

Composition

Installation

IMPORTANT: The following instructions are a summary. Refer to "DSF Install Data" and job-specific instructions of an EMSEAL technician for complete procedures. FOR PROFESSIONAL USE ONLY. KEEP OUT OF REACH OF CHILDREN.

• Store indoors at room temperature. Expansion is quicker when warm, slower when cold. Substrate temperature must range between 40°F (5°C) and 110°F (43°C).

•Precautions: Wear chemical-resistant gloves and/or barrier hand cream when handling liquid sealant or epoxy. Remove promptly from skin with a commercial hand cleaner before eating or smoking. Avoid inhaling vapors.

•Sequencing: Install factory-fabricated transition and/or termination pieces first. Connect straight run material to in-place terminations and transitions. Cut closing pieces 3/8-inch (10mm) longer than the opening to be joined. Compress material longitudinally to fit.

• Ensure nominal material size matches joint size.

• Mix epoxy and trowel a thin layer onto the joint faces to at least the depth of the DSF foam.

• Remove shrink-wrap packaging and hardboard.

• Wipe silicone facing using clean lint-free rag made damp with water.

• Insert material into joint to determined depth below the substrate surface.

• Inject a band of liquid silicone between mating bellows’ faces.

• Join lengths by pushing silicone-coated ends firmly together.

• Before the epoxy or the silicone cures, force the nozzle of the caulking tubes between the foam and the substrate and inject a silicone sealant band. Tool the overflow sealant into a corner bead between the top of the silicone bellows and the substrate.

• Clean Up: Remove epoxy or silicone sealant from equipment before it cures using MEK*, Toluene*, or Xylene*. These solvents are not effective after the epoxy or silicone has cured. Cured material may be removed by cutting it away with sharp tools or sandpapering.

IMPORTANT: Allow liquid silicone to attain a complete cure before filling area with liquid (7 days minimum).

Availability and Price