Product Data Sheet Safety Data Sheet Show all documents
Sikaflex®-730 SMP

Sikaflex®-730 SMP

Silane Modified Polymers For Durable Elastomeric Joint Sealant

Sikaflex®-730 SMP is a high modulus all-purpose sealant, a tough, durable elastomeric joint sealant suitable for use in a wide range of external and internal building applications. It is based upon SMP technology resulting in a unique combination of Silicone and Polyurethane properties, ideally suited to Thailand climatic conditions and construction norm which prefers to apply cementitious skim coating over joints and paint over skim-coated joints. Sikaflex®-730 SMP has excellent primer-less adhesion to a wide range of common building substrates as indicated below and does not stain concrete and other masonry surfaces.

  • Good primer-less* adhesion to most common building materials (*Refer to Priming section)
  • Paintable any time after curing, with water-based paints (compatibility testing recommended prior to full application)
  • Will not stain paint, skim-coating, masonry or other surfaces
  • Very durable
  • Neutral cure
  • Highly flexible
  • Low odor
  • Solvent-free and Isocyanate-free

     
FURTHER INFORMATION
The SMP, commonly referred to as MS or Modified Silicone within the market, represents a homogeneous  product sharing fundamental characteristics, while exhibiting nuanced distinctions in sub-functionalities,  properties, or applications.
Where to buy
Product Data Sheet Safety Data Sheet Show all documents

Usage

Sikaflex®-730 SMP has been formulated for sealing joints in and around concrete, brick, masonry, pre-cast panels, stone cladding, windows, doors, and fiber cement board. Sikaflex®-730 SMP bonds well to:
  • Concrete and masonry
  • Cement plaster systems
  • Aluminum, copper, brass, and zinc
  • Stainless, mild, or galvanized steel
  • Glass and ceramic tiles
  • Glass reinforced plastics.
  • Fiber reinforced cement board
  • Timber, particleboard, hardboard, and plywood (refer to Limitations section)  

Advantages

  • Good primer-less* adhesion to most common building materials (*Refer to Priming section)
  • Paintable any time after curing, with water-based paints (compatibility testing recommended prior to full application)
  • Will not stain paint, skim-coating, masonry or other surfaces
  • Very durable
  • Neutral cure
  • Highly flexible
  • Low odor
  • Solvent-free and Isocyanate-free

     
FURTHER INFORMATION
The SMP, commonly referred to as MS or Modified Silicone within the market, represents a homogeneous  product sharing fundamental characteristics, while exhibiting nuanced distinctions in sub-functionalities,  properties, or applications.

Packaging

600 ml sausage unipacs

20 pcs per carton (5 nozzles provided in box)

Colour

White and Grey

Product Details

Sustainability / Certifications / Approvals

CERTIFICATES AND TEST REPORTS

Complied with Joint Classification, ASTM C920,

Class 25 / Type S / Grade NS
Product Information

Shelf life

12 months from date of manufacture if stored correctly as stated

 

Storage conditions

Store in original, unopened packaging in cool and dry conditions.

Protected from direct sunlight and at temperatures +5°C to +25°C.

Density

~ 1.43 ± 0.02 g/m3

( ASTM D1475 )
Technical Information

Shore A hardness

~ 50 (after 7 days)

(ASTM C661 or D2240)

Tensile strength

~ 1.5 MPa

(ASTM D412)

Movement capability

> 25%

(ASTM C719 or ISO 9047)

Chemical resistance

Good to dilute acids and alkalis

Resistance to weathering

Excellent UV resistance

Service temperature

-40°C to +90°C

Joint design

Sikaflex®-730 SMP may be applied to joints between 10 and 35 mm wide. To minimize 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 these overriding minimum sealant depths:

  • 5 mm minimum sealant depth at any point.
  • 5 mm minimum bonding depth against metals, glass, and other non-porous surfaces, providing that joint faces are in good condition.
  • 8 mm minimum bonding depth against masonry or other porous surfaces, or any non-porous surfaces where joint faces are in poor condition.
  • Shear joints shall be a minimum joint width to depth ratio of 1:2 up to a maximum of 1:1.

Elongation at break

~ 330% (after 7 days)

(ASTM D412)

Application

Application Information

Curing rate

3 mm / 24 hours

(CQP-49-2)

Tack free time

~40 - 50 minutes (25 ±2°C)

(ASTM C679 or JIS K 96249)

Tooling time

~30 minutes (23 ±2°C)

(CQP-019-2)
Application steps

NOTES ON INSTALLATION

Good adhesion can be gained on concrete, timber, metals, ceramics, brick work and most coating surfaces without the use of primers. However, on some surface’s adhesion may be improved using a primer - refer to Sika for advice.

SUBSTRATE PREPARATION

Joint surfaces must be clean and free from frost and surface water. Remove all dirt, Laitance, loose materials, and foreign matter.

  • Remove all rust, scale, and protective lacquers from metal surfaces.
  • Highly porous surfaces should be cleaned and primed with Sika Primer-3N to enhance bond adhesion.
  • In all joints a bond breaker must be used to prevent sealant contact with the back of the joint, and hence allow optimum performance. In shallow joints self-adhesive polyethylene tape can be used. Deep joints should incorporate a backing strip to support the sealant while also acting as a bond breaker.

CLEANING OF EQUIPMENT

Clean tools immediately after use with any solvent such as Thinner.

Documents