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De Neef® - Leaks Stop Here

Fast. Proven. Durable.


Learn more about De Neef®, the global benchmark for products and expertise in leak sealing and water control solutions.

See How Fast
De Neef® Stops Leaks!

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GCP Applied Technologies offers specialty injection resins for leak sealing and geo-grouting with over 40 years experience. For the civil engineering and underground construction market this includes high quality single component polyurethane resins and acrylate injection systems for leak sealing, curtain wall injections, and soil stabilization. Specialist applicators have access to a range of solutions from classic drill and packer injections to screen injections. In the municipal market GCP offers solutions for the sealing of mainline and lateral sewers, manhole remediation and repairs to storm pipes, box culverts and water tanks. These injection materials can be applied using robot injections, drill and packer methods or by direct injection into soils. To serve the geo-engineering market there is a wide range of single and bi-component polyurethane resins, acrylate gels, and micro fine cements to solve soil improvement problems, groundwater control challenges and remedial injections in excavations. Grouting contractors who use down-hole packers, strainer pipes, or through wall installation techniques chose De Neef® resins for versatility, durability and performance. For tunnels and dams, GCP offers a wide range of De Neef​ products for specialty applications such as tunnel pre-grouting, rock stabilization, void filling, and groundwater control. Whatever injection problem or challenge the contractor has to solve, DeNeef® has the solution. In addition to these cutting edge technologies, GCP has the technical expertise to help the engineer solve, and the specialist contractors to  apply these solutions to the specific challenges of the project. It is this commitment to solving problems on every job site that puts the GCP technical specialists ahead of the field.





Aquatek Elastic 2C (CE) Elastic 2C (CE)2-component elastic cement based waterproofing membrane
Aquatek Plugs PlugsFast and Extra Fast setting plugging mortar
Aquatek Super XA Super XACrystaline wateproofing coating
Colflex HN HNRubber expansion joint tape
Deneblock UF UFUltra fast 2-component rigid non foaming water cutting resin
Denepox 40 (CE) 40 (CE)CE-marked high strength water tolerant epoxy crack injection resin
Dry Oakum OakumDry, oil free oakum fibre rope for sealing large open joints
Elastopack 201 2012-C non foaming elastic crack injection resin
Epicol T T2-C underwater epoxy patching compound.
Gelacryl acrylic injection resin for curtain grouting
Gelacryl AR2 AR2Formulated acrylic polymer based reinforcing agent for Gelacryl resins.
Gelacryl SR SR2-C acrylic injection resin for soil consolidation and sewer line repair
Gelacryl Superflex Superflex2-C high elastic afterswelling acrylic injection resin for masonry repair and curtain grouting.
Gelacryl Superflex AR (CE) Superflex AR (CE)CE-marked 2-C acrylic injection system for crack injections and curtain grouting.
Gelacryl TI TI2-C acrylic injection resin specifically developed for injection of Re-Injecto injection tubes
HA Cut AF Cut AF1-C high foaming, rigid closed cell, hydrophobic, pthalate free fast reacting injection resin for sealing large leaks.
HA Cut CFL AF Cut CFL AF1-C high foaming, semi-rigid closed cell, hydrophobic, pthalate free fast reacting injection resin for sealing large leaks.
HA Cut Cat XF/SXF AF Cut Cat XF/SXF AFSpecialist catalysts for use with HA Cut AF and HA Cut CFL AF for fast, extra fast or super extra fast reaction times.
HA Flex LV AF (CE) Flex LV AF (CE)CE-marked 1-C, closed cell, hydrophobic, phthalate free flexible injection resin for crack and joint injections into concrete.
HA Flex SLV AF Flex SLV AFUltra low viscosity 1-C closed cell, hydrophobic,phthalate free flexible injection resin for crack and joint injections into concrete (< 0.5 mm)