Sikagard®-5321 VEL TH

VINYLESTER RESIN BASED LAMINATE SYSTEM

Sikagard®-5321 VEL TH is 2 part, vinyl-ester based coating and lining system with extended pot-life.

High chemical resistance to acids, leaches, solvents and to oxidising agents
  • Applicable on concrete and steel
  • Fast curing
  • Crack bridging properties as laminate layer
  • Accessible
  • Excellent bond strength
  • Easy application
  • For internal and external use
Product Data Sheet Show all documents

Overview

Usage

Sikagard®-5321 VEL TH may only be used by experienced professionals.
Especially designed for the use in a chemically stressed environment,where a high chemical resistance is mandatory
  • Internal and external lining of chemical tanks
  • Secondary containment lining in bund area
  • Binder for GFR Laminate systems
  • Lining of gutters in process and storage area
 

Advantages

High chemical resistance to acids, leaches, solvents and to oxidising agents
  • Applicable on concrete and steel
  • Fast curing
  • Crack bridging properties as laminate layer
  • Accessible
  • Excellent bond strength
  • Easy application
  • For internal and external use

Packaging

Sikagard®-5321 VEL TH

25 kg / drum

Sikagard®-5321 VEL TH Hardener 

1 kg / container

Sikagard®-5321 VEL TH Powder Fine Grey25 kg / bag

Colour

Sikagard®-5321 VEL TH Solution

Transparent

Sikagard®-5321 VEL TH Hardener 

Opaque

Sikagard®-5321 VEL TH Powder Fine Grey 

Grey

Product Details

Composition

Formulated Vinylester Resin + Organic Peroxide

Shelf life

Sikagard®-5321 VEL TH 25 kg 

6 months

Sikagard®-5321 VEL TH Hardener 

6 months

Sikagard®-5321 VEL TH Powder Fine Grey 

24 months

From production date if stored properly in original, unopened and undamaged sealed packaging.

Storage conditions

Store in dry conditions at temperature between +5°C and +23°C. Protect from frost.

Density

Sikagard®-5321 VEL TH Solution

~ 1.10 kg/L

Sikagard®-5321 VEL TH Hardener 

~ 1.10 kg/L

Sikagard®-5321 VEL TH Powder Fine Grey

~ 1.40 kg/L (Bulk density)

Shore D Hardness

Approx. 80 (14 days / +23°C)

(DIN EN ISO 868)

Tensile strength

Approx. 70 N/mm2

(ISO 527)

Tensile adhesion strength

> 1.5 N/mm2 (failure in concrete)

(EN 4624)

Thermal resistance

Exposure

Temperature

Permanent

+60°C

Short-term max. 7 d

+80°C

Short-term max. 12 h+100°C

*Short-term moist/wet heat* up to +100°C, where exposure is only occasional (steam cleaning etc.).

Chemical resistance

According to test groups 1, 1a, 2, 3, 3a, 3b, 4, 4a, 4b, 4c, 5, 5a, 5b, 6, 6b, 7, 7a, 7b, 8, 9, 9a, 10, 11, 12, 13, 14, 15 und 15a

Hydrochloric acid

≤ 37%

Sulphuric acid

≤ 70%

Nitric acid

≤ 30%

Aqueous sodium hypochlorite12 % active chlorine
Hydrogen peroxide≤ 30%
Chromic acid≤ 20%

*Resistant to a wide range of chemicals, please ask for detailed chemicalresistance list Sikagard®-5321 VEL TH

Application

Ambient air temperature

+5°C min. / +35°C max.

Relative air humidity

80% r.h. max.

 

Dew point

Beware of condensation!
The substrate and uncured floor must be at least 3°C above the dew point to reduce the risk of condensation or blooming on the floor finish.

Substrate temperature

+5°C min. / +35°C max.

Substrate moisture content

< 4% pbw moisture content.
Test method: Sika®-Tramex meter, CM - measurement or Oven-dry method.
No rising moisture according to ASTM (Polyethylene-sheet).

Consumption

Sikagard®-5321 VEL TH, High Build Lining System (Not Crack Bridging)

Coating System

Product

Consumption

Primer

100 pbw Sikagard®-5321 VEL TH Solution 
+ 1.5 ppw Sikagard®-5321 VEL TH TH Hardener 

~ 0.3-0.4 kg/m2

1st coat (Scratch coat)

100 pbw Sikagard®-5321 VEL TH Solution

+ 1.5 ppw Sikagard®-5321 VEL TH Hardener

+ 200 pbw Sikagard®-5321 VEL TH Powder Fine Grey

~ 0.8 kg/m2

2nd coat (Top coat self smothening)

100 pbw Sikagard®-5321 VEL TH Solution

+ 1.5 ppw Sikagard®-5321 VEL TH Hardener

+ 100 pbw Sikagard®-5321 VEL TH Powder Fine Grey

~ 0.8 kg/m2

Sikagard®-5321 VEL TH, Standard system

Coating SystemProductConsumption

Primer or levelling mortar

100 pbw Sikagard®-5321 VEL TH Solution

+ 1.5 ppw Sikagard®-5321 VEL TH Hardener

+ 100-200 pbw Sikagard®-5321 VEL TH Powder Fine Gray

~ 0.55-1.10 kg/m2

Laminate layer

100 pbw Sikagard®-5321 VEL TH Solution

+ 1.5 ppw Sikagard®-5321 VEL TH Hardener

+ 2x300 g/m2 glass fabric

~ 1.8 kg/m2

Surface matt

30 g/m2 surface matt

+ 100 pbw Sikagard®-5321 VEL TH Solution

+ 1.5 ppw Sikagard®-5321 VEL TH Hardener

~ 0.2 kg/m2

 

Sikagard®-5321 VEL TH, Economical system

Coating SystemProductConsumption
Primer or levelling mortar

100 pbw Sikagard®-5321 VEL TH Solution

+ 1.5 ppw Sikagard®-5321 VEL TH Hardener

+ 100-200 pbw Sikagard®-5321 VEL TH Powder Fine Gray

~ 0.55-1.10 kg/m2
Laminate layer

100 pbw Sikagard®-5321 VEL TH Solution

+ 1.5 ppw Sikagard®-5321 VEL TH Hardener

+ 1x300 g/m2 glass fabri

~ 0.9 kg/m2

Surface matt

30 g/m2 surface matt

+ 100 pbw Sikagard®-5321 VEL TH Solution

+ 1.5 ppw Sikagard®-5321 VEL TH Hardener

~ 0.2 kg/m2

Sikagard®-5321 VEL TH, Heavy duty system

Coating System

ProductConsumption
Primer or levelling mortar

100 pbw Sikagard®-5321 VEL TH Solution

+ 1.5 ppw Sikagard®-5321 VEL TH Hardener

+ 100-200 pbw Sikagard®-5321 VEL TH Powder Fine Gray

~ 0.55-1.10 kg/m2
Laminate layer

100 pbw Sikagard®-5321 VEL TH Solution

+ 1.5 ppw Sikagard®-5321 VEL TH Hardener

+ 2x450 g/m2 glass fabric

~ 2.5 kg/m2

Surface matt

30 g/m2 surface matt

+ 100 pbw Sikagard®-5321 VEL TH Solution

+ 1.5 ppw Sikagard®-5321 VEL TH Hardener

~ 0.2 kg/m2

Sikagard®-5321 VEL TH, Anti-slip top coat (optional)

Coating SystemProductConsumption

1st Top coat

100 pbw Sikagard®-5321 VEL TH Solution

+ 1.0 ppw Sikagard®-5321 VEL TH Hardener

~ 0.2 kg/m2

Broadcast

Silicon carbine (0.5mm)

~ 0.5 kg/m2

2nd Top coat

100 pbw Sikagard®-5321 VEL TH Solution

+ 1.0 ppw Sikagard®-5321 VEL TH Hardene

~ 0.2 kg/m2

Notes:

  • These figures are theoretical and do allow for additional material required due to surface porosity,surface profile,variations in level, wastage.
  • The amount of Sikagard®-5321 VEL TH Hardener can be reduced to 1% in case of application temperature above 30 °C

APPLICATION INSTRUCTIONS

Sikagard®-5321 VEL TH must be thoroughly mixed using a low speed electric stirrer (300 - 400 rpm) or other suitable equipment.

SUBSTRATE PREPARATION

Substrates must be sound and of sufficient compressive strength (minimum 25 N/mm2) with a minimum pull off strength of 1.5 N/mm2. The substrate must be clean, dry and free of all contaminants such as dirt, oil, grease, coatings and surface treatments, etc. If in doubt, apply a test area first.


Concrete

  • Substrates must be prepared mechanically using abrasive blast cleaning or scarifying equipment to remove cement laitance and achieve an open textured surface.
  • Weak concrete must be removed and surface defects such as blowholes and voids must be fully exposed. Repairs to the substrate, filling of blowholes/voids and surface levelling must be carried out using appropriate products from the Sikafloor® , Sikagard® Sikadur® or Sika® MonoTop® range of materials.
  • The concrete or screed substrate has to be primed or levelled in order to achieve an even surface. High spots must be removed by e.g.grinding.
  • All dust, loose and friable material must be completely removed from all surfaces before application of the product, preferably by brush and/or vacuum.
 

Steel

  • Surfaces must be prepared mechanically using abrasive blast cleaning.The level SSPC-SP 10 “near white metal blast cleaned” or level Sa 2 ½ according to ISO EN 12944-4 has to be achieved. Welds and joints have to be prepared according to EN 14879, part 1.
  • After blast cleaning remove all dust dirt and blasting material. In order to maintain the surface conditions after blast cleaning air-conditioning is recommended.

MIXING

Levelling mortar

Part A: Part B
100: 1.5: 100-200 (by weight)

Laminate layer and topcoat

Part A: Part B
100: 1.0 - 1.5 (by weight)

Mixing time

Levelling mortar: Prior to mixing, stir part A mechanically. When all of part B has been added to part A, mix continuously for 1–2 minutes until a uniform mix has been achieved. Add, while stirring slowly the total amount of Sikagard®-5321 VEL TH powder.


Laminate layer and top coat: Prior to mixing, stir part A mechanically. When all of part B has been added to part A, mix continuously for 1–2 minutes until a uniform mix has been achieved.Over mixing must be avoided to minimise air entrainment.

APPLICATION

Prior to application, confirm substrate moisture content, relative humidity and dew point. If > 4% pbw moisture content, substrate has to be
dried or Sikagard®-720 EpoCem® ID has to be used as TMB (temporary moisture barrier).


Levelling mortar
Rough surfaces need to be levelled first. Apply the levelling mortar by squeegee/trowel to the required thickness.


Laminate layer
Apply the first layer of Sikagard®-5321 VEL TH by roller, imbed the glass fabric, apply the second and the third layer in the same way, wet in wet. After application of the final glass fabric de-aerate with a disc roller.

 

CLEANING OF EQUIPMENT

Clean all tools and application equipment with acetone immediately after use.Hardened and/or cured material can only be removed mechanically.
Attention: Acetone is a flammable liquid, please handle with care, use all equipment for your personal protection required.

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