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Mastic & Hydrophilic Waterstops

Synko-Flex® 302Fuel Resistant
Synko-Flex® 312
Hydro-Flex® 302Primer 311



Installation and
Technical Data

Home » Mastic and Hydrophilic Waterstops

Strip Applied Waterstop: mastic and hydrophilic

Synko-Flex       Preformed Plastic Adhesive Waterstop

Synko-Flex® .. NSF 61 Certified Waterstops

Henry Synko-Flex Synko-Flex® 302 waterstop is a specially formulated preformed adhesive joint sealant that provides a lasting, watertight bond to both fresh and cured concrete surfaces. Designed as an alternative to conventional waterstops that are used in cold joints at footings, walls or slab joints. Click here to see documentation (PDF) of NSF Certified Waterstops.

Synko-Flex® 312 is a fuel resistant waterstop. Design to control the ingress and egress of hydrocarbons and containing liquids at the control joints between concrete to concrete and concrete and dissimilar products. This product is an N.B.R. compound with polypropylene resins and other solvent resistant elastomers and plasticizers.

Hydro-Flex®

Hydro-Flex 302 Hydro-Flex® 302 waterstop is a flexible, preformed adhesive coil of 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.

Synko-Flex® Primer

Synko-Flex® Primer is a this penetrating solution for premium selected asphalt base in a petroleum solvent. The primer readily penetrates the pores and seals dusty concrete surfaces to providing an optimal surface
for the adhesion and bonding
of Synko-Flex performed adhesive waterstop. Primer is designed for application by brush.