SIKA · AUTHORIZED PROJECT DISTRIBUTOR · SPACE ARC ENGINEERING
Sika Primer-3
One-part polyurethane adhesion primer for Sika sealants and elastic adhesives
Product Overview
Sika Primer-3 is a single-component, solvent-based, moisture-curing polyurethane primer that prepares joint and bonding surfaces for Sika sealants and elastic adhesives. Brushed onto the substrate and left to flash off, it forms a tough adhesion-promoting layer that anchors products such as Sikaflex, Sika Polysulphide, SikaHyflex and Sikasil to both porous and non-porous surfaces. By improving the bond between the substrate and the sealant, it helps prevent adhesion failure in demanding expansion, isolation, peripheral and construction joints on concrete and metal. It is an essential preparatory step for applicators chasing long-term joint performance on infrastructure, industrial and building projects. Space Arc Engineering, an authorized Sika distributor in India, supplies Sika Primer-3 alongside the compatible sealant range so specifiers can source a complete, warranty-ready jointing system.
Features & Benefits
- Boosts adhesion of Sika sealants and elastic adhesives for durable, failure-resistant joints
- Works on both porous substrates like concrete and non-porous surfaces like metal
- Short flash-off time keeps the priming-to-sealing sequence efficient on site
- Brush-applied by hand with no special equipment needed
- Moisture-curing polyurethane forms a tough, reliable bonding layer
- Compatible across the Sikaflex, Polysulphide, SikaHyflex and Sikasil ranges
Technical Highlights
| Coverage | Approximately 250-300 linear metres per litre (about 5 m²/L) on porous substrates and 350-400 linear metres per litre (about 8 m²/L) on non-porous surfaces. |
| Strength | Acts as a high-strength adhesion promoter between substrate and sealant rather than a structural product; solid content about 57%. |
| Performance | Flash-off time ranges from a minimum of 45 minutes to a maximum of 4 hours before the sealant is applied. |
| Application Conditions | Apply between +5°C and +40°C, with relative humidity up to 85% and substrate moisture not exceeding 8%. |
| Packaging | Supplied in 500 g metal bottles, two per pack; light-brown liquid, density approx. 0.99 kg/L. |
Applications
- Priming concrete expansion joints before polysulphide sealing on infrastructure works
- Preparing metal joint faces ahead of Sikaflex bonding in industrial fabrication
- Isolation and peripheral joints in commercial flooring and facade systems
- Construction joints in water-retaining and basement structures
- Pavement and deck joints requiring reliable sealant adhesion on residential projects
SPACE ARC ENGINEERING · AUTHORIZED DISTRIBUTOR
Product image & sample available on request
Technical Data
| Type | 1-part solvent-based adhesion primer |
| Base | Moisture-curing polyurethane |
| Colour | Light brown liquid |
| Flash-off | 45 min to 4 hours |
| Coverage | ~5-8 m²/L by substrate |
| Pack size | 500 g bottle (2 per pack) |
Datasheet & Documents
Request the Technical Data Sheet, method statement and safety data sheet from Space Arc Engineering.
Request Quote / Availability
+91 9999155255
+91 7290089007
info@space-arc.com
Frequently Asked Questions
What is Sika Primer-3 used for?
It is a polyurethane primer that improves the adhesion of Sika sealants and elastic adhesives, including Sikaflex, Sika Polysulphide, SikaHyflex and Sikasil, on concrete and metal joint surfaces.
How much area does Sika Primer-3 cover?
It covers roughly 250-300 linear metres per litre on porous substrates and 350-400 linear metres per litre on non-porous surfaces, depending on joint width and surface texture.
How long should Sika Primer-3 flash off before sealing?
Allow a minimum of 45 minutes and a maximum of 4 hours of flash-off time before applying the sealant. Verify the window against the current TDS.
Do all Sika sealants need a primer?
Priming requirements depend on the substrate and the specific sealant. Where adhesion needs enhancing, especially on critical or submerged joints, Sika Primer-3 is recommended; refer to the relevant product TDS.
Who supplies Sika Primer-3 in India?
Space Arc Engineering is an authorized Sika distributor in India supplying Sika Primer-3 with the compatible sealant range. Call +91 9999155255 or email info@space-arc.com.
Related Products
- Sika Polysulphide Gun Grade — Vertical-joint sealant that benefits from priming for maximum adhesion.
- Sika Polysulphide, Pour Grade — Pourable floor-joint sealant primed with this product before placing.
- Sikaflex-11 FC+ — Elastic adhesive-sealant paired with the primer on demanding substrates.
- Sikaflex-127 — Facade sealant that uses primer for long-term joint durability.
Buy Sika Primer-3 — Sika Distributor in India
Space Arc Engineering is an Authorized Project Distributor supplying Sika products for infrastructure, industrial, commercial and residential projects across India.
+91 9999155255 | +91 7290089007 | info@space-arc.com