Product Data Sheet Show all documents

Sika® Primer-3

Primer for Sika® range of joint sealants and elastic adhesives for the construction industry

Sika® Primer-3 is a one-part, solvent containing primer for Sikaflex® & Sika® Polysulphide range of joint sealants

  • Excellent bonding on porous substrates (concrete, cementitious, etc.)
  • Excellent bonding on non-porous substrates like metal,etc.
  • Easy to apply manually
  • Excellent adhesion promoter between substrate and sealant
  • Short flash off time
Product Data Sheet Show all documents

Usage

Sika® Primer-3 is an all purpose primer for Sika® Polysulphide, Sikaflex®, SikaHyflex®, Sikasil® range of sealants and adhesives for concrete and metal substrates. It is used for priming the following types of joints:
  • Expansion
  • Isolation and peripheral
  • Construction
  • Other types of joints in building & pavement construction
 

Advantages

  • Excellent bonding on porous substrates (concrete, cementitious, etc.)
  • Excellent bonding on non-porous substrates like metal,etc.
  • Easy to apply manually
  • Excellent adhesion promoter between substrate and sealant
  • Short flash off time

Packaging

500g x 2 metal bottles

Colour

Light brown liquid

Product Details

Product Information

Chemical Base

Single component solvent based moisture-curing liquid polyurethane

Shelf Life

9 months from date of production

Storage Conditions

To be stored properly in original sealed containers, in dry conditions at temperatures between +5°C & +25°C.

Density

~0.99 kg/liter (at 30°C)

Solid Content

57%

Application

Application Information

Ambient Air Temperature

+5°C Min /+ 40°C Max

Relative Air Humidity

85% max

Substrate Temperature

+5°C Min /+40°C Max

Substrate Moisture Content

8% Max

Flash-off Time

Minimum

45 minutes

Maximum

4 hours
Consumption

Consumption

Type of Substrate

Yield per litre

Coverage per litre

Porous substrates

250 - 300 meters

5 m2

Non-porous substrates

350 - 400 meters

8 m2

Consumption may vary based on the substrate porosity, external temperature conditions, application techniques, joint dimensions,etc
Application steps

SUBSTRATE PREPARATION

  • Concrete, mortar surfaces must be clean, free from grease, oil, and loosely adhering particles.
  • Steel and iron surfaces must be free from scale, rust, grease and oil. All surfaces must be as true as possible.
  • The surface should be cleaned of all deletorious substances like oils and grease, loose friable particles like dust, paint, cement laitance, etc and any other contaminants. Suitable mechanical techniques such as wire brush or grinding or solvents may be used for such purposes but washed immediately.
  • Cleaned surfaces must be made as dry as possible, preferably using a blower, however slightly visible dampness is acceptable but there should be no standing water.
  • It is advisable to mask off adjacent areas to prevent possible discoloration.
  • Primer should be applied only on the two vertical sides of a joint with a bond breaking material like backer rod, thermocol,etc on the third horizontal side to hold the sealant to be filled.

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