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Construction Silicone 

High joint movement accommodation, one-component silicone joint sealant for  facade applications  



For sealing moving or static joints in:   

Precast or in-situ concrete   

Curtain walls and lightweight cladding   

Tilt-up slabs   

Brick, blockwork, marble and granite facades   

Most building materials    

Ready to use   

Easy application   

Fast curing   

Service temperature range -50oC to +150oC   

Long life weathering performance   

High joint movement accommodation   

Excellent adhesion to most construction materials   

Will not stain porous construction materials such as  concrete, marble or granite    
Construction Silicone is a one part, gun applied, neutral cure silicone sealant which cures rapidly to form a durable, weathertight seal. Construction Silicone remains permanently flexible and weatherproof under a wide range of climatic conditions. The unique polymers utilised in this 'state of the art' sealant combine to provide the outstanding weathering performance, for which silicone sealants are renown, with no risk of staining porous building materials.     


Design criteria:

Joint design: Moving joints should be designed and suited to minimise stresses imposed on the joint sealant. All movement joints should be designed with an optimum width to depth ratio of 2:1 with the overriding requirement that the sealant depth must not be less than 8 mm on nonporous surfaces and not less that 12 mm on porous surfaces.   


Bond breakers and joint fillers: In moving joints, the sealant must not be allowed to bond to the back face of the joint. Prevention of 3 sided adhesion is achieved by installing either a polyethylene bond breaker tape, or through the use a polyethylene foam backing rod.       


Data quoted are typical for this product but do not   

constitute a specification.   


Form: Non slump thixotropic paste   

Colours: Emer-Seal colour range   

Movement accommodation factor: Plus 50% / minus 30% (80% total)   

Typical  hardness  Shore  'A': 18 - 25   

Physical or chemical change: Chemical cure (non-acid)   

Application temperature: Minimum 5oC   

Service temperature: Minus 50oC - 150oC   

Tooling time: 20 minutes minimum @ 25oC, 65%RH   

Cure rate: Approx. 3 mm for 1st day at 25oC, 65% R.H then 1 mm / day Thereafter       


Application instructions
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 joint faces or by using Solvent 10. If it is necessary to apply Construction Silicone onto paints or other renewable surface coatings it is recommended that proposed system be carefully tested to ensure that adhesion is acceptable and properties of either the paint or the sealant are not adversely affected by long term contact. Construction Silicone is suitable for use directly onto powder coated metals and Colour Bond steel surfaces.     



Construction Silicone has excellent adhesion to most building surfaces without the use of a primer. For optimum results, particularly with moving joints, priming is always recommended.   

Primer 9: PVC, fibreglass and many plastic  surfaces   

Primer 10: Concrete, brick and most porous  substances   

Primer 11: Metals and most non-porous  substrates   

Primer 13: Concrete surfaces subject to  water immersion   


Primer drying times:   

Primer 9 and 11: 30 minutes   

Primer 10: 30 minutes   

Primer 13: 30 minutes - 2 hours   

Reprime if the sealant is not applied within 8 hours after  primer application.     


Fit the sausage of Construction Silicone into a suitable sausage gun (PC 770513), and gun firmly into joint. Ensure sealant is forced well against all joint surfaces to achieve good surface wetting and thus optimum adhesion. Guide nozzle along the joint gradually, applying even pressure to the trigger. The joint must be filled completely at all points.     


Immediately after application the sealant should be tooled. Use a smooth convex 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.     


Equipment should be cleaned promptly by wiping with solvent 10, as cured sealant is very difficult to remove. Cured sealant can only be removed by mechanical methods. Soaking the equipment in Solvent 10 makes removal of cured sealant easier.     


Elastomeric sealants such as Construction Silicone should not be applied in close proximity to bituminous materials or products containing reclaimed rubber (e.g. some tile adhesives).     


Estimating Supply

Construction Silicone: 600 ml sausage   

Primer 9, 10 and 11: 250 ml cans   

Primer 13: 250 ml packs   

Solvent 10: 4 and 20 litre drums
Each 600 ml sausage of Construction Silicone will seal 6  metres of a 10 x 10 mm joint or 3 metres of a 10 x 20 mm  joint.  As a guide, a 250 ml tin of primer will be required for every 12 sausages on porous surfaces or for every 50 sausages on non-porous surfaces.

Shelf life 12 months in unopened containers stored under  cool, dry conditions.


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