Strip Applied Waterstop: mastic and hydrophilic waterstops

Mastic Waterstops

Synko-Flex® Waterstop is a specially formulated preformed mastic adhesive joint sealant that provides a lasting, watertight bond to both fresh and cured concrete surfaces.

Synko-Flex® is designed as an alternative to conventional waterstops that are used in cold joints at footings, walls or slab joints. Synko-Flex does not rely on swelling upon contact with fresh concrete or water to achieve its watertight seal and waterstop capabilities. Because of this, there is never a danger of a joint "blow out" due to over expansion or improper positioning.

Synko-Flex® Waterstop is a non-expansive, single-component, self-sealing plastic adhesive compound, extruded in a square cross-section between two quick-release protective wrappers. It bonds to cured concrete surfaces and fuses with fresh concrete during the hydration and curing process to achieve a watertight seal. Once adhered, Synko-Flex is unaffected by rain, snow or infiltrating ground water which may be present during the installation period.

Synko-Flex®'s unique formula and packaging provides a simple, easy-to-install solution for effective waterstop sealing. It is also resistant to acids, alkalis and hydrogen sulfide gases over the life of the structure.

Synko-Flex® has been used since 1968 as a waterstop for cold joints in highway tunnels, airport terminals, marina animal theme parks, hospitals, performing art theaters, parking garages, hotels, office buildings, fish hatcheries, enclosed potable water reservoirs, warehouses, sports complexes and wastewater plants.

Easy Steps with Strip Applied Waterstop

Step 1: CLEAN Brush clean all loose dirt and particles from the concrete surface.
Step 2: PRIME Brush apply 2"-3" strip of Synko-Flex® Primer and allow to dry thoroughly (2-3 hours).
Step 3: STRIP Strip protective paper wrapper from one side only.
Step 4: PLACE Press firmly against primed surface throughout length and width of strip.
Step 5: LAP Strips are joined together with 1" overlap to form a continuos waterstop.
Step 6: STRIP Remove remaining protective paper when ready to install forms and pour concrete.
Step 7: POUR Fresh concrete against Synko-Flex® held in place by its adhesive properties.
Step 8: FINISH The Strip Applied Waterstop system is complete upon the curing of the concrete.

Hydophilic Waterstops

Hydro-Flex® is a flexible, preformed ahdesive coil specially formulated butyl rubber. It swells in the presence of water, filling voids in unfinished or poorly consolidated concrete surfaces providing a lasting, watertight compression seal in non-moving joints. Because of its special butyl rubber composition it remains flexible and easy to handle during cold weather conditions.