Description
Sikaflex PRO 3 Purform
What is Sikaflex PRO-3 Purform? It is Sika’s polyurethane joint sealant made on the Purform platform, replacing Sikaflex PRO-3. Sika lists it for horizontal and vertical interior and exterior joints in warehouse and production floors, the food industry, clean rooms, sewage treatment plants, tunnels, car park decks and trafficked areas.
Sikaflex PRO 3 Purform is Sika’s new future proof polyurethane platform and giving us the tools to create better products with lower impact.
Sikaflex PRO 3 Purform has all the pieces for reliable and durable sealing. Sikaflex PRO 3 Purform offers superior mechanical properties combined with excellent weatherability and chemical resistance to master the daily movement and environmental impacts for years.
Uses
Horizontal and vertical interior and exterior joint sealing applications:
- Food industry
- Cleanrooms
- Warehouse and production floor areas
- Sewage treatment plants
- Tunnels
- Car parks
- Pedestrian and traffic areas
Advantages
- High movement capability: ±25 % (EN ISO 9047), ±35 % (EN 14188-2) and ±50 % (ASTM C719)
- Fast development of mechanical properties
- High mechanical and chemical resistance
- High resistance to weathering
- Good durability
- Non-staining to a wide range of substrates
- Very low monomer content: no user safety training needed (REACH restriction 2023, Annex 17 entry 74)
- Bubble-free curing
- Good adhesion to most construction materials
What is Purform?
Purform is a revolutionary new polyurethane technology, developed by Sika chemists. It is a more sustainable and environmentally friendly alternative to traditional polyurethane based products.
Polyurethane is one of the key components of sealants and adhesives like those manufactured by Sika as it offers long lasting, reliable sealing and bonding even when exposed to adverse conditions such as chemicals, water or extremes of temperature.
Purform is a sustainable alternative to traditional polyurethane as it is better for both the environment and our health, thanks to its ultra-low VOC and low monomer content.
Using Purform in place of traditional polyurethane within two of our key products, Sikaflex Pro-3 and Sikaflex 11FC, future-proofs our products so we’re confident they’ll meet new health guidelines both now and in the future.
This comes without compromising on all important application and performance properties of these products, in fact the new formulation also offers improved strength and products which cure faster and last longer.
Sikaflex PRO-3 Purform: data sheet values
- Skin time: 50 minutes at +23 °C / 50 % r.h.
- Curing rate: 3.5 mm per 24 hours
- Movement capability: ±25 % (EN ISO 9047); ±35 % (EN 14188-2); ±50 % (ASTM C719)
- Application temperature (air and substrate): 0 °C to +40 °C
- Service temperature: -40 °C to +80 °C
- Shelf life: 15 months from the date of production, in original, unopened, undamaged packaging stored dry at +5 °C to +25 °C
Source: Sikaflex PRO-3 Purform PDS v04.03 (09-2025). Check the current data sheet for primer needs and joint design.
Which Sikaflex PRO-3 or construction sealant do I need?
Sikaflex PRO-3 Purform is the floor and civil-engineering joint sealant. For general building joints, compare it with Sikaflex Construction Purform 600ml in our Sikaflex PRO-3 Purform vs construction sealant guide, or read our overview of construction sealant types.
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