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RPS-207 Slurry Seal

Cementitious Concrete Repair Products

This product's information may differ depending on the category of use. You are currently viewing details related to Cementitious Concrete Repair Products. You can also view product information related to the categories of: Cementitious Coatings, Coatings

RPS-207 slurry seal  – formerly, FX-207 – is a two-component, polymer-modified cementitious coating designed for fire insulation with FRP materials as well as waterproofing and damp-proofing concrete and masonry substrates. This product is part of the tested assembly in UL Design No. N861, which achieved a four-hour fire rating when subjected to ASTM E119/UL 263 full-scale fire testing. Please refer to UL Online Certifications Directory for the UL listing.

CSI Specification

  • 07 11 16 Cementitious Damp-proofing
  • 9 96 43 Fire Retardant Coatings

Key Features

  • Trowel or slurry consistency
  • Convenient pre-measured kit
  • Excellent bond strength
  • Can be applied by brush, roller, spray or trowel
  • UL listed


  • Coating over FRP materials for fire insulation and flame/smoke spread resistance
  • Horizontal and vertical surfaces
  • Above-grade and below-grade applications
  • Waterproofing and damp‑proofing concrete and masonry
  • Interior and exterior applications
  • To protect concrete and masonry from freeze/thaw cycles

Application Rate

  • Damp-proofing: 40 WFT mils total applied in one coat, 40 ft.2/US gal. (1 m2/L) depending on surface profile and porosity
  • Waterproofing: 80 WFT mils total applied in two coats, 40 ft.2/US gal. (1 m2/L) per coat depending on surface profile and porosity


  • 0.50 ft.3 (0.014 m3) per kit


  • Gray

Mixing Ratio

  • Preproportioned kit. Use entire contents of all components.

Storage Conditions

  • Store dry between 40–95°F (4–35°C). Protect liquid component from freezing.

Shelf Life

  • 1 year in unopened packaging


  • 3 g/L (mixed)


3.9 US gallon (15 L) kit (RPS-207KT1-1) contains:

  • 1 US gallon (3.8 L) jug of Component “A” (RPS-207-1A)
  • 50 lb. (22.7 kg) bag of Component “B” (RPS-207-50B)

Limited Warranty

  • This product is covered by the Simpson Strong-Tie® RPS Product One-Year Limited Warranty, which is available at strongtie.com/limited-warranties or by calling Simpson Strong-Tie at (800) 999-5099

Related Literature

Code Reports & Compliance