MasterProtect H 400: Water-based 40% silane penetrating sealer

Formerly: Enviroseal 40

How does MasterProtect H 400 work?

MasterProtect H 400 is a water-based, 40% alkylalkoxysilane penetrating sealer. It provides long-lasting protection against moisture intrusion, freeze/thaw cycles, and chloride intrusion.

Recommended uses:

  • Interior or exterior
  • Horizontal
  • Above grade
  • Parking garages
  • Stadiums
  • Bridge decks
  • Concrete highway road surfaces
  • Ramps and barrier rails
  • Many other reinforced concrete structures

What are the unique features of MasterProtect H 400?

  • 40% silane
  • Ideal for traffic-bearing surfaces
  • Does not alter surface appearance

What are the benefits of MasterProtect H 400?

  • Excellent penetration protecting against damage from moisture intrusion and chloride ion penetration
  • Breathable to allow interior moisture to escape without damaging sealer
  • One component for ease of application

US / Canada Product Information

Data Guide

Data Guide (French)

Data Guide (Spanish)

Certification Letter

Guide Spec

LEED Letter

Direct contact

Master Builders Solutions Technical Support

Construction Systems


Safety Data Sheet (SDS)

Find all available safety data sheets for this product.

Product Certifications

Generate a free certificate of conformance for a specific BASF construction product.

Related Literature

Certification Letter

pdf (76.43 Kb)

Data Guide

pdf (352.25 Kb)

Data Guide (French)

pdf (318.70 Kb)

Data Guide (Spanish)

pdf (119.64 Kb)

LEED Letter

pdf (104.72 Kb)

LEED v4 Letter

pdf (69.80 Kb)


docx (143.58 Kb)