The Walraven Group, with its headquarters in Mijdrecht, Netherlands, is today an internationally active enterprise with its own production facilities and sales offices in various countries. Walraven products are used by tens of thousands of installation companies in Europe, North America, Latin America, Africa, the Middle East, Asia and Australia.

Decades of experience with our products and know-how have guaranteed the highest quality for 70 years and the performance of our expert tradesmen are priceless building blocks for our enterprise. We are proud of our history and innovation developing and implementing innovative technical ideas enjoys a high priority at Walraven. The starting point is ease of use and saving time during installation coupled with an optimum in reliability. Our constant motivation is being innovative and leading in quality.

System Philosophy

Each individual product is an important part of a total system solution. Market oriented, innovative and fitting the needs of the customer. Their 2 product systems are:
BIS Fixing Systems. BIS Fixing Systems contains products for plumbing, mechanical services, solar and electrotechnical installations.

 BISMAT Flash

 BIS starQUICK

 Phenblox

BIS UltraProtect


Spring Steel Clips


BIS Fire Protection Systems


BIS Fire Protection Systems consists of a wide range of sealing products for passive fire protection of mechanical and electrical installations. Their range includes different types of fire sleeves, fire collars, fire protection foam, coatings, intumescent sealants and mortar for fire safe, smoke tight and noise insulating sealing off:

  • Pipe and cable penetrations
  • Expansion joints, seams and void spaces
  • Penetrations for lighting in fire rated ceilings and for electrical socket/switches in fire rated walls





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