# US 2026/0307376 A1 · A method for producing a fully bonded waterbar > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2026/0307376 A1 - Document ID: US20260307376A1 - Status: Published application - Kind: A1 - Application number: 19/482,901 - Filed: 2024-07-29 - Published: 2026-10-08 - Earliest claimed: 2023-07-28 - Assignees: Sika Technology AG - Applicants: Sika Technology AG - Inventors: Roman DA RIN; Yang Soo LEE; Hans SCHMIDHOFER; Simon SCHOENBRODT; Isabel Andrea SIEGRIST - Web page: https://patentgrep.com/patent/US20260307376A1 ## CPC - B32B 27/306: {comprising vinyl acetate or vinyl alcohol (co)polymers} - B32B 27/08: of synthetic resin - B32B 37/24: with at least one layer not being coherent before laminating, e.g. made up from granular material sprinkled onto a substrate (B32B37/15 takes precedence) - E04B 1/6807: {Expansion elements for parts cast in situ} - B32B 2037/243: {Coating} - B32B 2038/0084: {Foaming} - B32B 2419/00: Buildings or parts thereof - B32B: LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM - E04B: GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS (border constructions of opening in walls, floors or ceilings E06B1/00; {electromagnetic shielding H05K9/0001}) ## Abstract A method for producing a waterbar, the method including steps of providing first and second sealing elements each including a carrier layer having upper and lower major surfaces and a filled polymeric layer covering at least a portion of the upper major surface of the carrier layer and bonding the lower major surface of the carrier layer of the first sealing element to at least a portion of the lower major surface of the carrier layer of the second sealing element. ## Claims ### Claim 1 A method for producing a waterbar comprising steps of: I) providing first and second sealing elements each comprising a carrier layer comprising at least one polymer P1 and having upper and lower major surfaces and a functional layer covering at least a portion of the upper major surface of the carrier layer and II) bonding the first and second sealing element to each other such that their carrier layers become directly or indirectly connected to each other over at least parts of their opposing lower major surfaces, wherein the functional layer of the first and second sealing elements is operative to bond with a fresh cementitious composition casted against it and allowed to harden. ### Claim 2 (depends on 1) The method according to claim 1, wherein step II) is conducted by thermally or adhesively laminating the lower major surface of the carrier layer of the first sealing element to at least a portion of the lower major surface of the carrier layer of the second sealing element. ### Claim 3 (depends on 1) The method according to claim 1, wherein at least one of the first and second sealing elements further comprises a reinforcement layer fully embedded into the carrier layer or located between the carrier layer and the functional layer. ### Claim 4 (depends on 1) The method according to claim 1 comprising a further step of providing a reinforcing laver, wherein step II) of the method is conducted in such a manner that the reinforcing layer becomes sandwiched between the carrier layers of the first and second sealing elements. ### Claim 5 (depends on 1) The method according to claim 1, wherein the carrier layer comprises at least 35 wt.-% of the at least one polymer P1. ### Claim 6 (depends on 1) The method according to claim 1, wherein the functional layer is selected from a layer of fiber material, a filled polymeric layer, a bitumen-based layer, and a layer of pressure sensitive adhesive. ### Claim 7 (depends on 1) The method according to claim 1, wherein the functional layer is a filled polymeric layer comprising: a) 25-75 wt.-% of at least one polymer P2 and b) 15-65 wt.-% of a least one solid particulate filler F. ### Claim 8 (depends on 7) The method according to claim 7, wherein the at least one polymer P2 is selected from ethylene vinyl acetate copolymers, polyolefins, halogenated polyolefins, polyvinylchloride, rubbers, and ketone ethylene esters. ### Claim 9 (depends on 7) The method according to claim 7, wherein the at least one polymer P2 comprises at least one ethylene vinyl acetate copolymer P21. ### Claim 10 (depends on 7) The method according to claim 7, wherein the at least one solid particulate filler F is selected from the group consisting of inert mineral fillers, mineral binders, and synthetic organic fillers. ### Claim 11 (depends on 6) The method according to claim 6, wherein the filled polymeric layer is obtained by extruding or co-extruding a first melt-processed composition comprising the constituents of the filled polymeric layer through an extruder die. ### Claim 12 (depends on 11) The method according to claim 11, wherein the first melt-processed composition comprises a blowing gas, which is released from the first melt-processed starting composition through surface(s) of the extruded profile discharged from the extruder die. ### Claim 13 (depends on 11) The method according to claim 11, wherein first melt-processed composition is obtained by melt-processing a first starting composition comprising the constituents of the filled polymeric layer and further at least one chemical blowing agent CBA. ### Claim 14 (depends on 1) A method for sealing an internal joint between two sections of concrete, the method comprising steps of providing a waterbar by using the method according to claim 1 and casting a first and a second section of concrete such that: a first side portion of the waterbar becomes embedded in the first section of concrete, a second side portion of the waterbar becomes embedded in the second section of concrete, and a center portion of the waterbar is positioned in the joint formed between the first and second casted concrete sections. ### Claim 15 (depends on 1) A method for sealing an external joint between two sections of concrete, the method comprising steps of: I) providing a waterbar by using the method according to claim 1, II) positioning the waterbar to a base onto which concrete is to be cast, III) casting a first and a second section of concrete such that: a center portion of the waterbar is located in or along the joint formed between the casted sections of concrete, a top surface of a first side portion of the waterbar forms a bond to the surface of the first section of concrete, and a top surface of the second side portion of the waterbar forms a bond to the surface of the second section of concrete.