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Emer-Seal CR Joint Sealant:


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   

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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