Professional use only - from the 24th August 2023, adequate training is required before industrial or professional use of this product.

Should you require training, visit - https://www.safeusediisocyanates.eu/

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• Features & Benefits
• Application
• Limitations

Features & Benefits

• Uses:
  • Waterproofing tunnels subject to water seepage through cracks around construction joints between lining blocks
  • Waterproofing wells or hydraulic structures that leak water through working joints or cracks
  • Repairing cracks in dams, canals and crest gates, even under the water bed
  • Sealing cracks in floorings or damp foundations saturated with water
• One-component polyurethane resin, free of halogens, made up of a mix of isocyanates, special admixtures and an accelerator prepared according to a formula developed in MAPEI research laboratories
• In order to achieve different reaction times, before using, Resfoam 1K-M must be mixed with Resfoam 1K-M AKS (accelerator) in a dosage from 1 to 10% by weight of resin, according to the needs on the jobsite. After mixing with the accelerator and in the absence of damp conditions, Resfoam 1K-M has a pot life of approximately one hour.
• During its pot life, Resfoam 1K-M must be injected through special packers into the structure that needs to be waterproofed by a piston pump or a membrane for one-component products
• When the resin comes in contact with water, it forms a semi-rigid waterproof polyurethane foam
• Thanks to its high fluidity, Resfoam 1K-M penetrates into about a hundred microns wide cracks and can seal them even if they are subject to water seepage
• Once set, after 40-80 seconds depending on the temperature and the amount of added accelerator, Resfoam 1K-M ensures complete waterproofing of the treated area
• Meets the requirements defined by EN 1504-9 (“Products and systems for the protection and repair of concrete structures - Definitions, requirements, quality control and evaluation of conformity - General principles for the use of products and systems”) and the minimum requirement claimed by EN 1504-5: U(S1)W(3)(1/2/3/4)(5/35) (“Concrete injection”)

Application

Sealing Cracks by Injection

Placement of Injectors

• Make staggered holes on the sides of the cracks. The size of the holes should fit the diameter of the injectors that will be used
• Expansion injectors with a non-return valve can be easily fixed, by their rotation, to block them completely to the walls of the hole
• If there is no water seepage, normal metal or plastic pipes with a diameter of approximately 10 mm can be used and can be fixed with Adesilex PG1. However, it is necessary to inject water before injecting Resfoam 1K-M in order to obtain an expanding reaction
• In the presence of water seepages, standard plastic or rubber pipes with a diameter of approximately 10 mm can be used and must be fixed with Lamposilex

Preparing & Injecting the Product

• Resfoam 1K-M is mixed directly in its drum with approximately 5% of Resfoam 1K-M AKS accelerator (10% if a very quick reaction is needed). After mixing, in the absence of damp or water, it can be injected for approximately 1 hour (it is necessary to protect the product from contact with damp air by covering the drum with its lid).
• Note: if, after mixing with the accelerator, Resfoam 1K-M is not protected from damp, a thin film can form over the surface (within 30 minutes from its preparation). However, this does not interfere with the use of the material.
• Inject Resfoam 1K-M continuously into the crack
• Resfoam 1K-M increases its volume as soon as it is in contact with water (after approximately 5-20 seconds depending on the temperature and humidity), creating a polyurethane foam and thus sealing cracks and blocking water seepages. In the absence of water Resfoam 1K-M does not expand and continues to penetrate into the cracks

Consolidating the Ground & Rock

• The product must be prepared in the same way as for injecting cracks in concrete structures
• While injecting and when Resfoam 1K-M is in contact with water, it increases in volume. This causes a slight pressure on the single grains of the ground, tamping them
• As a consequence of this, a polyurethane waterproof layer is formed, which varies in thickness, and permanently consolidates the injected material

Cleaning & Consumption

• The tools used for injection (pump and pipes) must be washed with mineral oil or special solvents free from water and
  impurities
• In open air, 1 kg of Resfoam 1K-M + 0.1 kg of Resfoam 1K-M AKS produce 50 litres of expanded foam on contact with 0.1
  litres of water

Limitations

• To consolidate cracked concrete structures that, at the moment of injection, are not subject to water seepage or strong dampness, use Epojet, fluid epoxy resin
• In case of water seepage under strong pressure, it is necessary to increase the amount of Resfoam 1K-M AKS accelerator up to 10% of the resin and in any case try to reduce the water pressure, even momentarily, when injecting the product
• If the injection treatment must carry out a structural consolidation function, it is preferable to use Foamjet F or Foamjet T, two-component polyurethane resins for the consolidation of cracked concrete and rocks subject to water seepage that, through reaction, become a very strong foam