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Emer-Seal CR:

Emer-Seal CR: Highly chemical resistant, fast cure, durable, one-component joint sealant
 

Uses  

 

Sealing joints in:  

Chemical bund areas  

Floor joints in chemical processing plants  

Concrete joints exposed to acid spillage  

Swimming pools  

Sewage processing tanks  

Food, wine and citrus processing areas
  
Advantages   
  

Ready to use  

Fast rate of cure  

Long life weathering resistance  

Highly resistant to biological attack  

Highly resistant to a wide range of chemicals including strong acids and alkalis  

Highly resistant to pool chlorine, salt water chlorination and ozone treatment  

Potable water AS4020 certification  

Compatible with Durafloor N protection systems for concrete    

 

Description    

 

Emer-Seal CR is a one part, gun applied non sag joint sealant designed for sealing expansion and construction joints exposed to aggressive chemical environments. Emer-Seal CR utilises unique polymer technology which provides outstanding chemical resistance and cures by reaction with atmospheric moisture to form a tough flexible seal. Once cured, Emer-Seal CR is resistant to attack from most of the aggressive chemicals used in the food, mining and chemical processing industries.    

 

Design criteria    

 

Emer-Seal CR may be applied to joints between 8 mm and 50 mm wide. To minimise stresses imposed on the joint sealant, all moving joints should be designed to an optimum width to depth ratio of 2:1. This ratio is subject to the following overriding minimum sealant depths:  

- 8 mm minimum sealant depth on non-porous surfaces  

- 12 mm minimum sealant depth on porous surfaces such as concrete and masonry  

- 20 mm minimum sealant depth in applications where the sealant is subject to a hydrostatic pressure or traffic. Care must be taken to ensure joint movement does not exceed the sealant's movement accommodation capability.   

 

Properties   

 

Data quoted is typical for this product but does not constitute a specification.  

 

Form:  

Non slump, thixotropic paste  

Hardness:  

- Shore A: 32 +/- 5  

Tensile modulus: 100% elongation:  

0.4 MPa @ 100%  

Ultimate elongation:  

>1.0 MPa @ >400%  

Colours:  

Concrete Grey, Pool Blue Other colours to batch order  

Physical or chemical change:  

Chemical cure, moisture activated  

  

Ready to use  

Fast rate of cure  

Long life weathering resistance  

Highly resistant to biological attack  

Highly resistant to a wide range of chemicals including strong acids and alkalis  

Highly resistant to pool chlorine, salt water chlorination and ozone treatment  

Potable water AS4020 certification  

Compatible with Durafloor N protection systems for concrete    

 

Description    

 

Emer-Seal CR is a one part, gun applied non sag joint sealant designed for sealing expansion and construction joints exposed to aggressive chemical environments. Emer-Seal CR utilises unique polymer technology which provides outstanding chemical resistance and cures by reaction with atmospheric moisture to form a tough flexible seal. Once cured, Emer-Seal CR is resistant to attack from most of the aggressive chemicals used in the food, mining and chemical processing industries.    

 

Design criteria    

 

Emer-Seal CR may be applied to joints between 8 mm and 50 mm wide. To minimise stresses imposed on the joint sealant, all moving joints should be designed to an optimum width to depth ratio of 2:1. This ratio is subject to the following overriding minimum sealant depths:  

- 8 mm minimum sealant depth on non-porous surfaces  

- 12 mm minimum sealant depth on porous surfaces such as concrete and masonry  

- 20 mm minimum sealant depth in applications where the sealant is subject to a hydrostatic pressure or traffic. Care must be taken to ensure joint movement does not exceed the sealant's movement accommodation capability.   

 

Properties   

 

Data quoted is typical for this product but does not constitute a specification.  

 

Form:  
Non slump, thixotropic paste  
Hardness:  
- Shore A: 32 +/- 5  
Tensile modulus: 100% elongation:  
0.4 MPa @ 100%  
Ultimate elongation:  
>1.0 MPa @ >400%  
Colours:  
Concrete Grey, Pool Blue Other colours to batch order  
Physical or chemical change:  
Chemical cure, moisture activated  
 

temperature

Minimum 5 C

Service temperature

Minus 50 C - 150 C

Tooling time

20 minutes @ 25 C 65% RH

Cure rate

Approx 3 mm in 24 hours, then 1 mm / day @ 25 C/65%RH

Movement accommodation factor

+/- 25% butt joints (50% total)

 
* Important: Ensure that Emer-Seal CR is fully cured before it is subjected to chemical exposure. (Note: Service life for intermittent exposure will be significantly longer than indicated below)
  
Acetic Acid 10%
 
Resistant, > 1 month
 
Acetic Acid 75%
 
Resistant, > 1 month
 
Acetic Acid Conc. (Glacial)
 
Resistant, > 1 month
 
Automotive Brake Fluid
 
Resistant, no attack
 
Chlorine (Sodium Hypochlorite) 2%
 
Resistant, no attack
 
Chlorine (Sodium Hypochlorite) 10%
 
Resistant, no attack
 
Citric Acid 10%
 
Resistant, no attack
 
Diesel Fuel 100%
 
Intermittent spillage OK
 
Detergent (GN8) 2%
 
Resistant, no attack
 
Ethanol 100%
 
Resistant, > 1 month
 
Heptane
 
Not resistant, <24 hours *
 
Hydrochloric Acid 10%
 
Resistant, > 1 month
 
Hydrochloric Acid 20%
 
Resistant, > 1 month
 
Hydrochloric Acid Conc. 36%
 
Not resistant, >2 hours *
 
Glycol 100%
 
Resistant, no attack
 
Lactic Acid 10%
 
Resistant, may discolour
 
Lactic Acid 25%
 
Resistant, may discolour
 
Motor Oil (unused) 100%
 
Resistant, no attack
 
Motor Oil (used) 100%
 
Resistant, no attack
 
Nitric Acid 10%
 
Resistant, > 1 month
 
Nitric Acid 25%
 
Resistant, > 7 days
 
Nitric Acid Conc. 70%
 
Not resistant, <1 hour *
 
Petrol, unleaded 100%
 
Not resistant, <24 hours *
 
Phosphoric Acid 10%
 
Resistant, no attack
 
Sodium Hydroxide 10%
 
Resistant, no attack
 
Sodium Hydroxide 25%
 
Resistant, no attack
 
Sodium Hydroxide 30%
 
Resistant, no attack
 
Sodium Hydroxide Conc. 50%
 
Resistant, no attack
 
Sugar Solution (saturated)
 
Resistant, no attack
 
Sulphuric Acid 10%
 
Resistant, no attack
 
Sulphuric Acid 25%
 
Resistant, no attack
 
Sulphuric Acid 50%
 
Resistant, no attack
 
Sulphuric Acid 75%
 
Resistant, > 1 month
 
Sulphuric Acid 98%
 
Not resistant, >2 hours *
 
Skydrol 100%
 
Resistant, > 1 month
 
Wine (Red) 100%
 
Resistant, no attack
 
Xylene
 
Not resistant, <24 hours *
 
Note: * = suitable for intermittent exposure only.
 
 
Specification clauses   

 

Where so marked on the drawings, joints are to be sealed with a high performance joint sealant offering proven performance against chemical attack. The joint sealant must be capable of accommodating +/- 25% joint movement and should be accompanied by data confirming the level of resistance of the sealant to the chemicals in question. Joint preparation, priming and sealant application must be in strict accordance with the current technical data. The joint sealant must be manufactured in Australia by an ISO9001 accredited supplier. The joint sealant must be installed by a contractor nominated by the supplier.  

Emer-Seal CR supplied by Parchem is such a product.   

 

Applications Instructions   

 

Joint preparation  

 

Ensure that all joint dimensions are as specified, and that the anticipated joint movement is within the movement accommodation capability of Emer-Seal CR. New concrete must be allowed to cure for a minimum of 28 days before sealant installation. Joint faces must be sound and completely dry, clean and frost free. Oil, grease, curing compounds, form release agents, and all surface contaminants must be completely removed by grinding the joint faces or by using Solvent. 

 

Bond breaker s and joint fillers   

 

Joints subject to hydrostatic pressure must have the sealant supported by a suitable rigid joint filler such as Parchem Hydrocor. Joints subject to hydrostatic pressure must also contain a suitable waterstop such as a Fosroc Supercast PVC.  

In joints not subject to hydrostatic pressure, a backing rod such as Expandafoam Backing Rod may be used. In formed joints a polyethylene bond breaker tape must be used to prevent sealant from adhering to the back face of the joint.  

Note: do NOT use masking tape, electrical insulation tape or 'Gafa' tape as a bond breaker tape. Emer-Seal CR may bond to the tapes and result in the failure of the joint sealant.   

 

Priming   

 

All joint surfaces must be sound and free from any trace of surface contamination.  

While Emer-Seal CR offers very good adhesion to concrete and masonry, the agressive nature of the chemicals that come into contact with the sealant demand that primers be used on masonry substrates. Priming is not normally required on solvent cleaned glass, ceramic and metal surfaces. Where metal surfaces are treated with paints or other organic coatings, adhesion testing is recommended to ensure that adequate adhesion will be achieved.  

 

Concrete and masonry surfaces must be primed with Primer 13, a two component epoxy primer which combines excellent chemical resistance with good hydrolytic stability, making this primer ideal for use in demanding chemical resistance applications. Emer-Seal CR used in conjunction with Primer 13 is suitable for use in permanently water immersed applications. Primer 13 must be touch dry before  

applying Emer-Seal CR sealant.   

 

Application   

 

Fit the sausage of Emer-Seal CR into a suitable sausage gun and gun firmly into the joint. Ensure that the sealant is forced well against all joint surfaces to achieve good surface wetting and thus optimum adhesion. Guide the nozzle along the joint gradually, applying even pressure to the trigger. The joint must be filled completely at all points.   

 

Tooling   

 

Immediately after application the sealant should be tooled. Use a smooth tool to produce both the required surface finish and to assist in further forcing the sealant into good contact with the joint faces. The use of use soapy water as a tooling aid is not recommended as the cure of the sealant may be adversely affected.  

 

Clean up  

 

Equipment should be cleaned promptly by wiping with Parchem Solvent, as cured sealant is very difficult to remove. Cured sealant can only be removed by mechanical methods. Soaking the equipment in Parchem Solvent makes removal of cured sealant easier.  

 

Limitations  

 

Elastomeric sealants such as Emer-Seal CR should not be applied in direct contact with bituminous materials. Emer-Seal CR is not designed to provide resistance to organic solvents. Contact Parchem for advice if organic solvent resistance is required. Stabilised Chlorine containing "trichloroisocyanuric acid" may cause the breakdown of surface layers of Emer-Seal CR. Also, crystallized deposits may form on the surface of the sealant from reaction of the above trichloroisocyanuric  

acid and urea if regular pool cleaning is not done. Emer-Seal CR has been tested for resistance to many chemicals including Sulphuric Acid, Hydrochloric Acid and Caustic solutions.   

 

Estimating   

 

Supply  

 

Emer-Seal CR: 600ml sausage  

 

Primer 13: 250 ml units (Base and Hardener, supplied in the correct proportions  

Complete units must be mixed to ensure correct curing)  

 

Solvent: 4 and 20 litre drums  

 

Coverage  

 

Each 600 ml sausage will seal approximatel 3 metres of a 20 mm x 10 mm joint.  

 

Storage  

Shelf life 12 months when stored in unopened original containers in dry conditions, between 5  C and 30 C .    
  

 

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