Sika® Injection-304
Polyacrylic elastic injection resin for permanent watertight sealing
Sika® Injection-304 is a very low viscous, elastic and very quick-gelling polyacrylic injection resin with a gelling time adjustable within a range. The material reacts to form a waterproof, elastic and solid gel with good adhesion to both dry and wet substrates.
- Permanently elastic
- Capable of reversibly absorbing (swelling) and releasing (shrinking) moisture
- Adjustable gelling times at various temperature ranges
- Very low viscosity compared to water
- Once cured the Product is insoluble in water and hydrocarbons and resistant to alkalis
- Resistant to alternating freeze and thaw exposure
- Injected with a two component pump
Usage
The Product is designed for:- Sealing of all types of leaking building components in damp or water saturated ground
- Curtain injection
- Consolidation of non-cohesive soils with low permeability
- The Product must only be used in below ground structures
Advantages
- Permanently elastic
- Capable of reversibly absorbing (swelling) and releasing (shrinking) moisture
- Adjustable gelling times at various temperature ranges
- Very low viscosity compared to water
- Once cured the Product is insoluble in water and hydrocarbons and resistant to alkalis
- Resistant to alternating freeze and thaw exposure
- Injected with a two component pump
Packaging
Part A1 (Resin) | 21.5 kg |
Part A2 (Accelerator) | 1.05 kg |
Part B ( Hardener) | 1.00 kg |
Refer to the current price list for available packaging variations.
Colour
Part A1 (Resin) | Amber - liquid |
Part A2 (Accelerator) | Colourless - liquid |
Part B (Hardener) | White powder |
Product Details
Chemical Base
3-part polyacrylic gel
Shelf Life
12 months from date of production
Storage Conditions
The product must be stored in original, unopened and undamaged sealed packaging in dry conditions at temperatures between +10 °C and +35 °C. Always refer to packaging.
Refer to the current Safety Data Sheet for information on safe handling and storage.
Density
Part A1 (Resin) | ~1.20 kg/l |
Part A2 (Accelerator) | ~0.96 kg/l |
Part B + water (Hardener) | ~1.03 kg/l |
Viscosity
Complete mixture at +20 °C | ~7 mPa∙s |
Application
Mixing Ratio
A = A1 : A2 | 21.5 : 1.05 parts by weight |
B solution = water : B | 20 : 1 parts by weight (Standard mixture) |
A : B solution | 1 : 1 parts by volume |
Ambient Air Temperature
Maximum | +40 °C |
Minimum | +5 °C |
Substrate Temperature
| Maximum | +40 °C |
| Minimum | +5 °C |
Reaction time
Reference values depend on the concentration of Part B at various application temperatures.
B : Water = 0,5 % by weight
Material Temperature | Increase in viscosity | Reaction time |
+10 °C | ~220 s | ~315 s |
+20 °C | ~103 s | ~180 s |
B : Water = 1,0 % by weight
Material Temperature | Increase in viscosity | Reaction time |
+10 °C | ~150 s | ~225 s |
+20 °C | ~72 s | ~150 s |
B : Water = 2,0 % by weight
Material Temperature | Increase in viscosity | Reaction time |
+10 °C | ~85 s | ~150 s |
+20 °C | ~45 s | ~90 s |
B : Water = 3,0 % by weight
Material Temperature | Increase in viscosity | Reaction time |
+10 °C | ~56 s | ~110 s |
+20 °C | ~37 s | ~68 s |
B : Water = 5,0 % by weight (standard mixture)
Material Temperature | Increase in viscosity | Reaction time |
+10 °C | ~50 s | ~80 s |
+20 °C | ~28 s | ~40 s |
The data above are laboratory parameters and may deviate depending on the situation and conditions on site.
MIXING
Mixing the components
Note: Mix the combined Parts A1 and A2 and the solution of Part B to water in two identically sized mixing vessels. Assess the amount of water required for dissolving the Part B (approximately 18,0 litres) by adjusting the volume of Part B to that of Part A.
PREPARE PART A1 AND PART A2:
- Immediately before use mix Parts A1 and A2 at a mixing ratio of 21.50 : 1.05 parts by weight.
- Empty the smaller container (Part A2) completely into the container of Part A1.
- Mix the parts thoroughly with a mixer using a paddle attachment.
PREPARE PART B SOLUTION:
- IMPORTANT Use a non-corroding paddle attachment. Immediately before use dissolve Part B (powder) in water by thoroughly mixing using a paddle attachment for 2–3 minutes.Note Use a clean plastic container for mixing.
APPLICATION
IMPORTANT
Environmental considerations
Failure to properly assess the jobsite and the scope of the application can lead to a loss of Product performance.
- Survey the jobsite to assess foundations and ground conditions before carrying out curtain injection in close proximity to or within existing structures.
- Check to make sure there are no open pipes or drainage systems close to injection areas.
- Assess the feasibility of the injection proposal, material consumption and positioning of drill holes.
- Prior to use check the Product's gel time within the local site ambient conditions.
- Contact Sika technical services for specific information on resistance to hydrocarbons or chemicals.
IMPORTANT
Pump seizure
The pump may seize or become unusable if material accumulates within the suction hose sieves.
- Regularly check the suction hose sieves for material residue and perform intermediate cleaning cycles.
IMPORTANT
Pump blockage caused by cured material
The pump may become blocked if unused material is allowed to cure inside the pump.
- After finishing the injection works clean the 2-C-pump thoroughly with minimum 20 L of fresh, clean water per component-side.
The Product is injected by a 2- component pump with an additional water flushing pump.
- Prepare the material according to the mixing instructions and pump directly from the containers. Note Material will be mixed and activated in the static mixer of the pump`s mixing head
- As soon as the material is cured, remove the packers.
- Clean out drill holes approximately 10 cm deep.
- Seal drill holes with a mortar plug.
CLEANING OF TOOLS
Clean all tools and application equipment with water immediately after use. Hardened material can only be removed mechanically.