Product Data Sheet Show all documents
Unicell® 40

Unicell® 40

Prebagged High Build, High Strength, Waterproof Class 40 Repair Mortar

Unicell® 40 is a prepacked vinyl acetate copolymer modified mortar requiring only the addition of clean water to produce a mortar suitable for concrete repair and rendering. The material conforms to the Hong Kong Housing Authority specification for Class 40 repair mortar system. The performance of the product is certified under the Hong Kong Concrete Institute (HKCI) Product Conformity Certification Scheme PCCS-RM : Class 40. It can be applied in thick section and is suitable for structural and non-structural application. Layers of 40 mm can be achieved depending upon substrate profile and technique. Greater thickness may be possible when applying material into pockets. Successive layers can be built up to achieve the required thickness once the previous layer has become firm.  

  • Prebagged giving greater confidence
  • Single pack requiring only the addition of water
  • Easy to apply on overhead surfaces
  • Easy to achieve smooth surface finish
  • Suitable for structural repairs
  • Low VOC
  • Can Contribute to LEED certification
Product Data Sheet Show all documents

Usage

  • Thick section concrete repairs to vertical and overhead surfaces
  • Can be used internally and externally
  • Structural and cosmetic repairs to buildings and bridges
  • Reinstate damaged concrete and protect reinforcement

Advantages

  • Prebagged giving greater confidence
  • Single pack requiring only the addition of water
  • Easy to apply on overhead surfaces
  • Easy to achieve smooth surface finish
  • Suitable for structural repairs
  • Low VOC
  • Can Contribute to LEED certification

Packaging

25 kg bag

Colour

Concrete grey

Product Details

Product Information

Product Declaration

Characteristics For Repair Mortar (from PCCS-RM CI. 5.1 Table 1)

Test MethodTest
Description		Age at TestPCCS-RM
Specification
(Class 40)		Unicell® 40
Typical
Performance
TM1Compressive
Strength		28 days30–6048 MPa
TM2Tensile
Strength		7 days≥ 2.03.3 MPa
TM3Elastic
Modulus		28 days15–2518 GPa
TM4Bond
Strength		7 days≥ 2.03.0 MPa
TM5Coutinho
Ring		1–28 daysNilNo Cracking
TM6Figg Air
Permeability		35 days≥ 200360 sec

* All of the above data complies with Product Conformity Certification Scheme.

Shelf Life

6 months from the date of production

Storage Conditions

Stored properly in undamaged and unopened original sealed packaging in dry conditions. Protect from direct sunlight, moisture and frost.
Technical Information

Compressive Strength

Age at TestUnicell® 40
Typical Performance		Test Method
7 days44 MPaTM1
28 days48 MPaTM1

Tensile Strength in Flexure

Age at TestUnicell® 40
Typical Performance		Test Method
7 days7.0 MPaBS 6319 : Part 3 : 1983
28 days9.8 MPaBS 6319 : Part 3 : 1983

Tensile Strength

Age at TestUnicell® 40
Typical Performance		Test Method
7 days3.3 MPaTM2
28 days3.5 MPaTM2

Tensile Adhesion Strength

Age at TestUnicell® 40
Typical Performance		Test Method
7 days3.0 MPaTM4
28 days3.5 MPaTM4

Water Absorption

Age at Test

Unicell® 40

Typical Performance

Test Method
28 days

0.0125 ml/m2/s

at 10 min

BS 1881 : Pt. 208
28 days

0.0105 ml/m2/s

at 30 min

BS 1881 : Pt. 208
28 days

0.0086 ml/m2/s

at 60 min

BS 1881 : Pt. 208
28 days

0.0053 ml/m2/s

at 120 min

BS 1881 : Pt. 208

Application

Application Information

Flowability

Approx. 50 %

(BS 4551 : Part 1 : 1998 cl.9)
Consumption

Consumption

Approx. 58 bags/m3
Application steps

MIXING

Mix the whole bag of Unicell® 40 with 4 to 4.5 litres clean water to even consistency with the aid of a mechanical mixer.

APPLICATION

  • Apply the well mixed Unicell® 40 mortar to the prepared and primed substrate before the primer coat dries
  • Application thickness should be between 6–40 mm per layer
  • Intermediate layers should be primed before the next layer is applied
  • Finish the repair to the desired profile using steel trowel or wood float
  • Allow the repair area to cure properly and consult with Sika's technical department for curing method in severe conditions
  • Minimum cover to reinforcement should be 10 mm

CLEANING OF TOOLS

Clean all tools and application equipment with clean water immediately after use.

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