Sikaflex®-621 — The All-in-One Adhesive Sealant That Bonds Without Primer and Can Be Painted
If you need a polyurethane adhesive sealant that bonds directly to metals, plastics and painted surfaces without applying a primer first, Sikaflex®-621 is exactly what you need. One product, two functions — sealing and bonding — with the added benefit of being paintable directly over the cured surface. Available at Plana Online, official Sika distributors in Spain, with delivery in 24/48 hours.
Purform® Technology — Better Performance, Safer Workplace
Sikaflex®-621 is formulated with Sika's Purform® technology — a next-generation polyurethane with less than 0.1% free monomeric diisocyanate. This means lower exposure to hazardous substances during application, greater safety for the operator and compliance with the most stringent emission regulations — without compromising the technical performance demanded by the most challenging industrial applications.
Where is Sikaflex®-621 Used?
Industrial manufacturing and building components
Sealing and bonding of components on production lines working with metals, engineering plastics and painted surfaces. Primer-free adhesion simplifies the production process and reduces cycle times — without compromising joint quality.
Vehicle repair and maintenance
Joint sealing, component bonding and bodywork repairs where the product will receive paint afterwards. The direct paintability of Sikaflex®-621 makes it the natural choice in bodywork and commercial vehicle workshops.
Interior and exterior construction
Sealing and bonding of profiles, panels, window frames and building elements indoors and outdoors. High resistance to ageing and weathering ensures joint durability under prolonged exposure conditions.
Key Technical Data
Chemical base: 1-part polyurethane (Purform®) · Cure mechanism: Moisture cure · Colours: White, grey, black, brown · Application temperature: 5–40 °C · Skin formation time: 45 min · Elongation at break: 600% · Service temperature: -50 to +90 °C (continuous) / 120 °C (24h) / 140 °C (1h) · Shelf life: 12 months
Certifications
Passes EN45545-2 R1/R7 HL3 (railway) · ISEGA 60342 U 23 certified (food contact) · Complies with DIN EN ISO 846 · Low emissions · Less than 0.1% monomeric diisocyanate
Available Pack Sizes
300 ml cartridge · 600 ml unipack · 23 l pail · 195 l drum
Why Buy from Plana Online?
Official Sika distributor in Spain
Genuine product with manufacturer warranty, full technical and safety data sheets included with every order. No middlemen, no risk of non-original product.
Over 25 years of experience
We have been supplying Sikaflex to industry, construction and automotive professionals for decades. We know the product and the applications — and our technical team is available if you have questions before ordering.
Delivery across Spain in 24/48 hours
Order today and receive it tomorrow at your workshop, plant or job site. No excuses for work stopping due to lack of materials.
