The Polyflex MS Detail Membrane is a single-component, medium-viscosity waterproofing product designed for use in precision detailing applications such as upstands, joints, outlets, and penetrations. Developed with advanced MS Polymer hybrid technology, it delivers a tough, flexible, and seamless barrier that ensures watertight protection in even the most complex roof areas.

This solvent- and isocyanate-free formulation provides exceptional adhesion and flexibility, making it suitable for both horizontal and vertical surfaces. Capable of bridging cracks up to 5 mm, it forms a fully elastomeric, UV-stable finish that resists weathering and movement for years of reliable performance.

Key Features & Benefits
  • MS Polymer hybrid technology for advanced detailing performance
  • Single-component and ready to use – no mixing required
  • Medium viscosity – ideal for precision detailing and vertical applications
  • Bridges cracks up to 5 mm
  • Excellent adhesion to damp or porous surfaces
  • Solvent-free and isocyanate-free – safe and low-odour
  • UV-stable, seamless finish
  • Provides long-term flexibility and protection in critical roof details
Technical Summary
  • Technology: MS Polymer Hybrid
  • Viscosity: Medium
  • Crack Bridging: Up to 5 mm
  • Composition: 100% Elastomeric
  • VOC Content: Solvent-free
  • Application: Brush, roller, or trowel
  • Coverage Rate: 7 kg tin = approx. 2.5 m² (at 2 mm dry film thickness)
  • Suitable Substrates: Concrete, timber, metal, bitumen, and existing membranes
Recommended Applications
  • Roof penetrations and outlets
  • Upstands, joints, and edge terminations
  • Gutters, seams, and patch repairs
  • Complex detailing on flat and pitched roofs
  • Parapet junctions and flashing interfaces

Roofer's No.1 Polyflex MS Detail Membrane 7kg

  • Brand: Roofers No.1
  • Product Code: 43RN1MSDT
  • Availability: In Stock
  • £74.00

All Prices are exclusive of VAT


Tags: 43RN1MSDT