Product Data Sheet Safety Data Sheet Show all documents
Sikaflex® Primer-429

Sikaflex® Primer-429

SURFACE CONDITIONERS AND ADHESION PROMOTERS FOR Sikaflex® SEALANTS

Sikaflex® primers are specially formulated to be used on specific substrates with Sikaflex® polyurethane sealants. Most substrates require a primer only if testing shows need and where the sealant will be underwater after cure. Some substrates do require a primer under all conditions.  

  • One-component primer packaged in 473 mL (16 US fl. oz) tin, ready to use
  • Easily applied by brush, dauber or spray
Product Data Sheet Safety Data Sheet Show all documents

Usage

Sikaflex® Primer-429 is used to promote adhesion to clean, sound and dry concrete, masonry and wood including teak and mahogany prior to placing Sikaflex® sealants.

Advantages

  • One-component primer packaged in 473 mL (16 US fl. oz) tin, ready to use
  • Easily applied by brush, dauber or spray

Packaging

473 mL tin (16 US fl. oz), 6/case

Colour

Clear (almost colourless)

Product Details

Product Information

Shelf Life

Six (6) months in original, unopened package.

Storage Conditions

Store dry at temperatures between 5 and 32 °C (41 and 89 °F). Condition product to temperatures between 18 and 27 °C (65 and 81 °F) before using.

Density

Specific Gravity: 1

Volatile organic compound (VOC) content

491.5 g/L

Viscosity

NO.2 Zahn (sec.)

-

Brookfield, MPa.s (cps)

135

 

Application

Consumption

Yield

90 (295)

13 x 13 mm (1/2 x 1/2 in) joint

5 (203)

Coverage m2/L (ft2/US gal.) (approx.)
Application steps

APPLICATION INSTRUCTIONS

Substrate Primer RequiredRecommended Primer
Concrete BlockNo429
Placed ConcreteNo429
Precast Concrete

No

429
MortarNo429
GroutNo429
SikaTopsNo429
GraniteNo429
Unfinished WoodsNo429
EIFS - Dryvit, Sto, Synergy**Yes429

**Note: Product will bond without primer, however primer is recommended by EIFS manufacturers to properly seal substrate.  Follow EIFS manufacturer's primer recommendations.

 

SUBSTRATE PREPARATION

The key to good adhesion with Sikaflex® sealants is surface preparation. Specifically, all surfaces must be dry and free of dirt, grease, form release agent, loose mortar, laitance and any foreign matter. If the joint contains old sealant, it must be removed and the substrate cleaned by mechanical means. Apply primers at substrate temperatures of 4 °C (39 °F) and rising. Surface must be frost-free.

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