MasterProtect H 185: High-performance, breathable, water-based, patented silane/siloxane blended water-repellent sealer for lightweight block

Formerly: Enviroseal PBT

How does MasterProtect H 185 work?

MasterProtect H 185 is a high-performance, water-based, clear, silane/siloxane sealer designed to provide long-term protection for the most challenging split-faced and lightweight block as well as standard CMU.

Recommended uses:

  • Vertical
  • Interior or exterior
  • Above grade

What are the unique features of MasterProtect H 185?

  • Water repellency extends life of building
  • VOC compliant for EPA and most regional jurisdictions
  • Transparent and non-staining; does not alter surface appearance
  • Easy to apply

What are the benefits of MasterProtect H 185?

  • Treats lightweight block and CMU providing long-lasting protection against moisture intrusion
  • Excellent water bead so the substrate maintains dry appearance during rainfall
  • Breathability allows interior moisture to escape without damaging sealer

US / Canada Product Information

Data Guide

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

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Related Literature

Certification Letter

pdf (76.45 Kb)

Data Guide

pdf (338.69 Kb)

Data Guide (Spanish)

pdf (118.36 Kb)

Guide Spec

doc (168.00 Kb)

LEED Letter

pdf (110.65 Kb)

zip (54.40 Kb)