TDS

Sealant depends on good joint design and proper
application with joint surfaces properly prepared.
Do not tool with water, detergent or soap solutions.▪
White color tends to yellow slightly when exposed to
ultraviolet rays.
▪
Light colors can yellow if exposed to direct gas fired
heating elements.
▪
Do not use in contact with bituminous / asphaltic
materials.
▪
When overcoating with water-based, oil-based or
rubber-based paints, compatibility and adhesion
testing of mock-up installations is essential.
▪
Do not use paints which are silicone based or have a
high solvent content. Avoid solvent-based and alcohol-
based primers, stains, sealers and coatings.
▪
ENVIRONMENTAL, HEALTH AND SAFETY
For further information and advice regarding
transportation, handling, storage and disposal of
chemical products, user should refer to the actual Safety
Data Sheets containing physical, environmental,
toxicological and other safety related data. User must
read the current actual Safety Data Sheets before using
any products. In case of an emergency, call CHEMTREC
at 1-800-424-9300, International 703-527-3887.
APPLICATION INSTRUCTIONS
SUBSTRATE PREPARATION
Clean all surfaces. Joint walls must be sound, clean, dry,
frost-free, and free of oil and grease and any other
contaminants. Install bond breaker tape or backer rod to
prevent bond at base of joint.
Priming
Priming is not usually necessary. Most substrates only
require priming if testing indicates a need. Consult
Sikaflex® Primer Product Data Sheet or Technical Service
for additional information on priming.
APPLICATION METHOD / TOOLS
Recommended application temperatures: 40 to 100 °F (4
to 38 °C). For cold weather application, condition units
at approximately 70 °F (21 °C); remove prior to using.
For best performance, Sikaflex® + Construction Sealant
should be gunned into joint when joint slot is at mid-
point of its designed expansion and contraction. Place
nozzle of gun into bottom of the joint and fill entire
joint. Keep the nozzle in the sealant, continue on with a
steady flow of sealant preceding the nozzle to avoid air
entrapment. Avoid overlapping of sealant to eliminate
entrapment of air. Tool as required. Joint dimension
should allow for 1/4 in. (6.3 mm) minimum and 1/2 in.
(12.7 mm) maximum thickness for sealant. Proper
design is 2:1 width to depth ratio. For use in horizontal
joints in traffic areas, the absolute minimum depth of
the sealant is 1/2 in. (12.7 mm) and closed cell backer
rod is recommended. Tool sealant to ensure full contact
with joint walls and remove air entrapment. Tool as
necessary, dry or with clean water.
For green/new concrete application, 24 hours after
concrete has cured. Concrete must be of good quality
and strength. Note: Curing will vary depending on
temperature and humidity.
In formed joints, forms must be removed 6 hours
before applying sealant.
▪
In control joints, concrete must be cut 8 hours before
applying sealant.
▪
For wet concrete application, water source must be
stopped 1 hour before application and concrete must be
free of standing water.
CLEANING OF TOOLS
Uncured material can be removed with approved
solvent. Cured material can only be removed
mechanically. For spillage, collect, absorb, and dispose
of in accordance with current, applicable local, state,
and federal regulations.
Product Data Sheet
Sikaflex® + Construction Sealant
February 2021, Version 01.05
020511010000000074
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