PRODUCT DATA SHEET
SikaGrout®-4 UW
Shrinkage compensated cementitious grout for underwater application
DESCRIPTION CHARACTERISTICS / ADVANTAGES
SikaGrout®-4 UW is a ready to use, cementitious grout ▪ Effectively displaces water
that can be used for applications underwater. The ▪ Shrinkage compensated
grout, when applied, will effectively displace the wa- ▪ Does not segregate or bleed
ter. ▪ Good impact, vibration & thermal resistance
SikaGrout®-4 UW is a blend of portland cement, care- ▪ Non-corrosive to steel and iron
fully selected aggregates and Sika admixtures. This ▪ Application by pouring or pumping
raw materials enable excellent flow, non-washout
characteristics and high compressive strength.
Suitable for use in hot and tropical climatic conditions.
USES
SikaGrout®-4 UW is used for grouting applications un-
derwater or in tidal zones, for reinstating concrete,
like:
▪ Bridge columns
▪ Pillars
▪ Piles
▪ Slipways
▪ Dams
PRODUCT INFORMATION
Composition Portland cement, selected fillers and aggregates, special additives.
Packaging 25 kg bag
Shelf life 12 months minimum from date of production.
Storage conditions Store in original unopened packaging in cool and dry condition between 5
°C and 35 °C. Protect from direct sunlight, heat and moisture.
Appearance and colour Grey powder
Maximum grain size ~4 mm
Product Data Sheet
SikaGrout®-4 UW
April 2023, Version 02.01
020201010010000271
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TECHNICAL INFORMATION
Compressive strength 4.5 L water 1 Day 7 Day 28 Day (ASTM C109)
per bag
w/p ratio = ~20 N/mm2 ~40 N/mm2 ~50 N/mm2
0.18
Tensile adhesion strength ≥ 1.5 N/mm2 (28 d)
APPLICATION INFORMATION
Mixing ratio 4.0 - 4.5 L of water per 25 kg bag
Fresh mortar density ~2.2 kg/l
Yield ~13.4 L per 25 kg bag
Layer thickness Under water Above water
Min. 10 mm Min. 10 mm
Max. 180 mm Max. 100 mm
Pot Life ~3 h (25 °C)
BASIS OF PRODUCT DATA MIXING
Add water according to the desired consistency into a
All technical data stated in this Data Sheet are based clean mixing vessel before slowly adding the Sik-
on laboratory tests. Actual measured data may vary aGrout®-4 UW. SikaGrout®-4 UW is best mixed in a
due to circumstances beyond our control. forced action mixer, for 2 to 3 minutes or until the mix
is free of lumps, not longer than 5 minutes. Slow
FURTHER INFORMATION speed drill (maximum 500 rpm) can be also used for
mixing. Normal tumble type concrete mixers are not
Method Statement: SikaGrout®-4 UW - Underwater suitable. Do not mix more grout than can be placed
grouting within 15 to 20 minutes. Do not add extra water or
other ingredients. Mix only full bags for the best res-
ECOLOGY, HEALTH AND SAFETY ult.
Note: Always start with minimum recommended
User must read the most recent corresponding Safety quantity of water (water/powder ratio), only if re-
Data Sheets (SDS) before using any products. The SDS quired, gradually add water to desired consistency. Do
provides information and advice on the safe handling, not exceed maximum allowed limit of water per bag
storage and disposal of chemical products and con- weight.
tains physical, ecological, toxicological and other
safety-related data. APPLICATION
APPLICATION INSTRUCTIONS Placement:
SikaGrout®-4 UW can be poured or pumped through a
SUBSTRATE QUALITY / PRE-TREATMENT flexible tube to the lowest section of the formwork.
The grout flow must be restricted during the pour so
Concrete surfaces should be clean, rough, sound and that water is not entrapped. The flexible tube can be
free from oil, grease, cement laitance and all loosely raised to reduce back pressure, however, it should
adhering particles. never be raised above the surface level of the grout.
Permanent immersed substrates can be prepared by Curing:
high pressure water jet. Non-permanent immersed Curing will not be required in submerged situations.
substrates can be prepared by high pressure water jet, However, grout cast above water level should be
sand blasting or by scrabbling. cured using suitable methods such as plastic sheeting,
Metal surfaces (iron and steel) should be free from wet hessian, or Sika Antisol-WB curing agent.
scale, rust, oil and grease.
CLEANING OF EQUIPMENT
Clean equipment and mixer after application with wa-
ter. Hardened material can only be removed mechan-
ically.
Product Data Sheet
SikaGrout®-4 UW
April 2023, Version 02.01
020201010010000271
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LOCAL RESTRICTIONS
Note that as a result of specific local regulations the
declared data and recommended uses for this product
may vary from country to country. Consult the local
Product Data Sheet for exact product data and uses.
LEGAL NOTES
The information, and, in particular, the recommenda-
tions relating to the application and end-use of Sika
products, are given in good faith based on Sika's cur-
rent knowledge and experience of the products when
properly stored, handled and applied under normal
conditions in accordance with Sika's recommenda-
tions. In practice, the differences in materials, sub-
strates and actual site conditions are such that no war-
ranty in respect of merchantability or of fitness for a
particular purpose, nor any liability arising out of any
legal relationship whatsoever, can be inferred either
from this information, or from any written recom-
mendations, or from any other advice offered. The
user of the product must test the product’s suitability
for the intended application and purpose. Sika re-
serves the right to change the properties of its
products. The proprietary rights of third parties must
be observed. All orders are accepted subject to our
current terms of sale and delivery. Users must always
refer to the most recent issue of the local Product
Data Sheet for the product concerned, copies of which
will be supplied on request.
SIKA NORTHERN GULF SIKA SOUTHERN GULF Sika Saudi Arabia
Bahrain / Kuwait UAE / Oman / SIC Riyadh / Jeddah / Dammam
Tel: +973 177 38188 Tel: +971 4 439 8200 Tel. +966 11 217 6532
info@bh.sika.com info@ae.sika.com info@sa.sika.com
gcc.sika.com gcc.sika.com gcc.sika.com
SikaGrout-4UW-en-AE-(04-2023)-2-1.pdf
Product Data Sheet
SikaGrout®-4 UW
April 2023, Version 02.01
020201010010000271
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