Sikaflex-1c SL
Self-leveling polyurethane joint sealant · US · manufacturer-sourced
How long does Sikaflex-1c SL take to dry?
Short answer
Bead cure stages
Skin, tack-free and paint-ready are not the same moment
- Gun a continuous bead of Self-leveling polyurethane joint sealant
- Tool it inside the working time
- Keep it dry until the stated water-ready time
This product’s stated stages Quoted at 73°F and 50% humidity
- Tack-free1–2 hours
- Full cure3–5 days
- Immersion-ready7 days
Worth noticing: Tack-free at 1–2 hours; immersion-ready at 7 days.
Common mistake: Showering or painting at skin-over, when the bead is only crusted on the outside.
Bond-strength path
Assembly, handling and full load are different stages
Time the caulk cure
Your countdown
Stated times
- Tack-free1–2 hours
- Immersion-ready7 days
- Full cure3–5 days
From Sika data sheet · checked 2026-10-25. Anything not listed isn’t stated by the manufacturer.
Manufacturer website: usa.sika.com
Conditions & fine print
- Stated conditions: 73°F (23°C) and 50% relative humidity
- Skin and cure times depend on temperature, humidity and bead depth. Follow the current data sheet.
- Temperature range: 40°F to 100°F
- Region US. Formulas can differ between countries; check your container.
- Tack-free: At 23°C (73°F) and 50% relative humidity.
- Immersion-ready: Standard conditions.
- Full cure: The source gives no conditions for this time.
- Entered from the cited manufacturer documentation. Check the current label for the exact formula and region. Report outdated information
- Actual results depend on preparation, thickness, ventilation, temperature, humidity, mixing and substrate.
Confirm this is your product
Closely named formulas, colors and regional versions can use different times. Match these details to your container before starting a countdown.
- Exact listing
- Sika Sikaflex-1c SL
- Variant
- Self-leveling polyurethane joint sealant
- Region
- US
- Listed use
- horizontal joints, concrete joints, traffic joints
- Timed stages recorded
- tack free, immersion, full cure
- Source checked
- 2026-10-25
Documentation: Technical data sheet copy · Version 01.08, August 2025
Condition attached to the stated time: At 23°C (73°F) and 50% relative humidity.
About this product
A pourable one-part polyurethane for horizontal joints. Its 2025 sheet gives 1 to 2 hours tack-free and 3 to 5 days to final cure, and wants a full week before the joint is under water. Joints under traffic should be 1/2 in. deep.
Using this specific product
Sika Sikaflex-1c SL is listed here as the Self-leveling polyurethane joint sealant version for horizontal joints, concrete joints, and traffic joints. For sealing a joint, the useful question is not simply whether the surface looks finished—it is whether the exact next-action milestone shown above has been reached.
Before you start
- Confirm the package says Self-leveling polyurethane joint sealant; related versions can use different timing.
- For horizontal joints, concrete joints, and traffic joints, pay particular attention to joint depth, tooling, ventilation and exposure to water.
- At 23°C (73°F) and 50% relative humidity. Standard conditions. The source gives no conditions for this time.
How to check readiness
Probe an inconspicuous edge for a continuous skin and follow the stated water-exposure milestone. The data sheet gives a tack-free time of 1 to 2 hours. Continuous immersion is more demanding than splashes; wait for the specific immersion milestone. Reserve full cure for demanding use, chemicals, washing, immersion or load—not merely gentle handling.
Avoid this mistake
Surface skin is not the same as through-cure, especially in a deep joint.
Compare with similar products
- Compare with Loctite (Henkel) Polyseamseal All Purpose Adhesive CaulkTack-free: 30 min there, 1–2 h here.
- Compare with OSI (Henkel) SC-175 Draft and Acoustical SealantTack-free: 30 min there, 1–2 h here.
Questions
How long does this product take to dry?
Sika states: The data sheet gives a tack-free time of 1 to 2 hours. Conditions: At 23°C (73°F) and 50% relative humidity.. The data sheet says to allow 1 week of cure before total water immersion. Conditions: Standard conditions.. The data sheet gives a final cure of 3 to 5 days. Conditions: The source gives no conditions for this time.. These are the manufacturer’s stated times, not a guarantee.
How long before a Sikaflex-1c SL joint can sit in water?
The data sheet says to allow 1 week of cure at standard conditions for total water immersion. Tack-free is 1 to 2 hours and final cure is 3 to 5 days.
How long does this product take to fully cure?
Sika states: The data sheet gives a final cure of 3 to 5 days. Conditions: The source gives no conditions for this time.. These are the manufacturer’s stated times, not a guarantee.
How long before this product can be immersed in water?
Sika states: The data sheet says to allow 1 week of cure before total water immersion. Conditions: Standard conditions.. These are the manufacturer’s stated times, not a guarantee.
What affects how long this product takes to dry or cure?
Skin and cure times depend on temperature, humidity and bead depth. Follow the current data sheet. Follow the product label for your conditions.