Protecting concrete usually means shielding it from the elements of nature or from harsh manmade chemicals. But it’s not just concrete that needs such protection. Corrugated metal pipe, steel surfaces, material hoppers, rail cars and masonry all can come in contact with corrosive or abrasive materials or harsh conditions.
The geotechnical needs of DOTs and other agencies responsible for roads and bridges are vast. Issues include: Culvert repair Soil stabilization Void filling Concrete slab lifting Sinkhole remediation Slope control Slough control in tunneling
Prime Flex 920 is a single-component polyurethane injection resin used to seal gushing leaks, including wide gaps, in concrete where the structure is not subject to movement. This hydrophobic, super low viscosity polyurethane reacts with water and expands to form a closed cell, watertight, rigid foam. Due to its low viscosity, 920 is also used for permeation grouting of loose soils to consolidate soil particles and increase the load-bearing capacity. (For high strength or large void filling, see Prime Flex 985.) This material requires the use of Prime Kat or Kick Fast Kat to adjust the reaction time from 4-13 seconds. (See Material Preparation below.)
• Transbay Transit Center – San Francisco, CA
• City of Olathe – Olathe, KS
• SLS Hotel – Miami, FL
• City of Anderson – Anderson, SC
• Minneapolis LRT Tunnel – Minneapolis, MN
• City of Tacoma – Tacoma, WA
• Curtis Palmer Dam – Corinth, NY
• Lake Park Marina, Lake Park, FL
When cured, Prime Flex 920 exhibits a tensile strength (ASTM D-1623) of 41 p.s.i., tensile elongation (ASTM D-1623) of 3.4%, zero shrinkage, and a compressive strength (ASTM D695) of 1027 p.s.i. or 147,888 p.s.f. (with fine sand).
Thoroughly mix materials using a low speed drill with a mixing paddle. Mixing by hand with a stir stick or simply shaking a container will not properly mix the material. Once catalyst has been added, the 920 will react upon contact with moisture. See technical data sheet for complete details.
5 gallon pails
50 gallon drums
250 gallon totes
10:1 Quick Mix cartridges (case of 6 with Kick Fast catalyst)