MasterSeal ® gg 470



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MasterSeal



®

 GG 470

 

 



 

 

High performance, elastomeric joint sealant, (Gun Grade) 

 

DESCRIPTION

 

MasterSeal GG 470 is a high grade, polysulphide 

based sealant possessing outstanding resistance 

to deterioration due to weathering, ozone, ultra-

violet light and attack by chemicals present in 

industrial atmospheres.  It has the ability to 

withstand repeated cycles of compression and 

extension over a wide temperature range, and has 

excellent adhesion properties to all materials 

commonly employed in building and construction 

work. 


 

MasterSeal GG 470 is supplied in 2 packs, a total 

of 3 litre sealed units for sealing horizontal and 

vertical joints where pronounced cyclical 

movement is expected and where the service 

conditions would be harsh for most common 

sealants.  It is ideal for use in expansion joints in 

reinforced concrete structures such as bridges, 

reservoirs, water treatment works, sea walls and 

roads, etc.  It can also be used in floor joints 

subject to heavy usage where a high resistance to 

damage is required. 

 

TYPICAL PROPERTIES*



 

 

Colour Grey 

Solid content 

97% 


Viscosity Thixotropic 

paste 


Tack free at 25°C 

24 hours 

Staining Generally 

non-staining 

Slump Gun Grade 

Nil 


Shore A Hardness 

20-25 


Application 

temperature 

5°C to 40°C 

Recommended 

movement 

Transverse ±25% M.A.F. 

(Movement Accommodation 

Factor) 


 

PACKAGING

 

Gun Grade: 

2 pack units, a total of 3 litres 

 

STANDARDS



 

ASTM C 920-02 

Type M, Class 25 

BS 5212 : Part 1 : 1990  Compliance 

BS EN ISO 11600 

Type F, Class 25LM 

TT-S-00227E General 

compliance 

 

ESTIMATED SET AND CURE TIMES

 

 

Property 25°C  40°C 

Pot life 

2 hrs 

45 min 


Initial set 

24 hrs 


5 hrs 

Full cure 

2 weeks 

7 days 


 

JOINT SIZE

 

Joint size may range from a minimum of 5mm to a 

maximum of 50mm wide.  Joints with cyclic 

movements should have a width:depth ratio 2:1 

and designed so total movement does not exceed 

the 25% M.A.F. related to the joint width.  Sealant 

depth shall not exceed joint width except joints 

subject to total immersion where joint profile 

should be 1:1. 

 

Minimum sealant depth recommended: 



 

5mm for metals, glass and other impervious 



surfaces. 

 



10mm for all porous surfaces. 

 



20mm for joints exposed to hydrostatic 

pressures. 

 

5mm below flush for joints exposed to traffic. 



 

APPLICATION PROCEDURE

 

 

JOINT PREPARATION SURFACE 

TREATMENT

 

 

Concrete & 

Masonry 

Surfaces must be clean and dry.  

Wire brush thoroughly and remove 

dust and all contaminants. 

Metals 

Remove any corrosion or millscale 



by grit or shotblast, wirebrush, 

grinder or chemical remover.  De-

grease the surfaces with clean 

cloths soaked in oil-free cleansing 

solvent. 

Wood (bare) 

Wood surfaces must be clean and 

dry, cut back or abrade where 

necessary to sound timber. 

Glass and 

glazed materials 

Thoroughly clean the surfaces with 

clean cloths soaked in oil-free 

cleansing solvent. 

Coating 

surfaces 

Coating should be removed and the 

surfaces treated as above. 

Where required, a bond breaking tape should be applied 

before priming. 



 

 

MasterSeal



®

 GG 470

 

 



 

 

PRIMING

 

The correct primer must always be used. 

 

SURFACE APPLICATION

 

MasterSeal P 101 

Porous surfaces (such as concrete and masonry) 

Non-porous surfaces (such as metals, glass and 

glazed surfaces). 

 



 



Application of primer should not be carried out 

below 4°C. 

 

A single coat of primer should be applied by 



brush in accordance with the instructions on 

the primer tins. The primer must be allowed to 

dry to a tack free state before applying 

MasterSeal GG 470

 



MasterSeal GG 470 should be applied within 

3 hours of primer, otherwise repriming will be 

necessary. 

 

APPLICATION TEMPERATURE

 

MasterSeal GG 470 should be applied when the 

ambient temperature is between 4°C and 50°C.  

When the temperature is below 10°C storage at 

room temperature for several hours will ease 

mixing and application. 

 

APPLICATION TEMPERATURE



 

 

MIXING:

 

 



 

Mix and use one complete unit at a time.  Do 

not sub-divide. 

 



Gun grade is supplied in base & catalyst in 

separate units. 

 

Mix for 5 - 10 minutes using a suitable paddle 



fitted to a 500 rpm electric drill moving the 

paddle completely through the mass of the 

material.   

 



Add the complete contents of the catalyst from 

its container and mix thoroughly, into the base 

using a palette knife. 

 



Failure to completely disperse catalyst 

throughout the base compound will result in 

uncured sealant. Once mixed  

MasterSeal GG 470 should be used 

immediately. 

 

APPLICATION

 

 



MasterSeal GG 470 is formulated to be 

applied using a sealant gun but may be 

applied by trowel if required. 

 



Sealant guns are fitted with conical nozzles 

which can be cut to suit the joint width. 

 

The sealant should be gunned into the joint 



using an even trigger pressure, cleaning the 

nozzle occasionally to avoid contamination.  

Deep joints should be filled in two or more 

runs, to prevent air entrapment. 

  Once the sealant has been applied, a small 



timber spatula, soaked in soapy water, should 

be used to compact the sealant into the joints 

and to achieve a smooth polished finish.  Any 

masking tape which has been applied should 

be removed before the sealant cures. 

 

Mixing and application equipment should be 



cleaned immediately. 

 

COVERAGE



 

MasterSeal GG 470 (length of joint in metres filled 

per 1 litre of material) 

Depth of joint 

Width of joint mm 

mm 

10 15 20 25  30 



10 10 

6.7 


3.33 



15  

4.45 


3.33 

2.67 


2.23 

20  


 

2.5 


1.67 


25 

   1.6 


1.33 

 

STORAGE



 

Store under cover out of direct sunlight and protect 

from extremes of temperature.  In tropical climates 

the product must be stored in an air conditioned 

environment.  Shelf life is at least 12 months when 

stored between 5°C and 35°C. 

 

SAFETY PRECAUTIONS

 

The components and mixed sealant should not be 

left in contact with skin for prolonged periods.  

Gloves should be worn and the use of a barrier 

cream is strongly recommended.  Solvent must 

not be used for cleaning the hands.  Use an 

industrial cleaner and wash with soap and water.  

For further information including disposal 

instructions refer to the Material Safety Data 

Sheet. 


 

 

MasterSeal



®

 GG 470

 

 



BASF_CC-UAE/Sl_GG470_05_06/v3/07_15 

STATEMENT OF  

RESPONSIBILITY 

 

The technical information and application advice given in this BASF publication are based on the present state of 

our best scientific and practical knowledge.  As the information herein is of a general nature, no assumption can be 

made as to a product's suitability for a particular use or application and no warranty as to its accuracy, reliability or 

completeness either expressed or implied is given other than those required by law. The user is responsible for 

checking the suitability of products for their intended use. 

 

NOTE 

Field service where provided does not constitute supervisory responsibility.  Suggestions made by BASF either 

orally or in writing may be followed, modified or rejected by the owner, engineer or contractor since they, and not 

BASF, are responsible for carrying out procedures appropriate to a specific application. 

 

 

 

 

BASF Construction Chemicals UAE LLC 

P.O. Box 37127, Dubai, UAE 

Tel: +971 4 8090800,  Fax: +971 4 8851002 

www.master-builders-solutions.basf.ae 

 

 

 

 

 

 

Disclaimer: the LRQA mark relates 

to certified management system and 

not to the product mentioned on this 

datasheet 



 

 

 

 



 

 

 



 

 

 



 

 

NOTE

 

Field service, where provided, does not constitute 

supervisory responsibility.  For additional 

information contact your local BASF 

representative. 

 

BASF reserves the right to have the true cause of 



any difficulty determined by accepted test 

methods. 

 

 

 



 

 

 



 

 

 



 

 

 



 

 

 



 

 

 



 

 

 



 

 

 



 

 

 



 

 

 



 

 

QUALITY AND CARE



 

All products originating from BASF’s Dubai, UAE 

facility are manufactured under a management 

system independently certified to conform to the 

requirements of the quality, environmental and 

occupational health & safety standards ISO 9001, 

ISO 14001 and OHSAS 18001. 

 

* Properties listed are based on laboratory controlled tests. 



 

®

 = Registered trademark of the BASF-Group in many countries. 



 


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