ResinTech RMS — Roof Membrane System
ResinTech RMS is a liquid-applied, seamless roof waterproofing system for exposed roofs: new concrete roof decks and the restoration of existing roofing. Two coats of FLEXCOAT-PU with reinforcing fabric between them form the waterproofing membrane, finished with a UV-stable top membrane — PPM as standard, or HPP for fast turnaround and any colour.
Download the RMS System Data Sheet & Application Guide (PDF)
The RMS Build
| Layer | Product | Film | Notes |
| 1 · Primer (optional) | CBE or TUE | Per primer TDS | Only where the substrate or the adhesion test calls for it |
| 2 · Base membrane, coat 1 | FLEXCOAT-PU (FPU) | 25–28 mils wet | Details reinforced first; 28 mils wet is the FPU maximum per coat |
| 3 · Reinforcement | Polyester reinforcing fabric compatible with FPU | One layer | Concrete decks: full surface. Existing roofing: full surface recommended, not mandatory; always at seams, laps, flashings, drains and transitions |
| 4 · Base membrane, coat 2 | FLEXCOAT-PU (FPU) | 25–28 mils wet | Encapsulates the fabric. Can go on straight away, wet-on-wet, as the fabric is laid |
| 5 · Top membrane — standard | PPM (medium grey) | 18–20 mils wet, one coat | Never more than 20 mils over FPU |
| 5 · Top membrane — fast option | HPP (field-tinted to any colour) | 10–15 mils wet | Fast return to service; keep within 10–15 mils over FPU |
| 6 · Colour finish (optional, over PPM) | HPP or TCU | Per product TDS | Where a set long-term colour or gloss is required over PPM |
Total membrane before any optional finish: about 50–56 mils wet of FPU plus fabric, then 18–20 mils wet of PPM (≈ 68–76 mils wet in all) or 10–15 mils wet of HPP (≈ 60–71 mils wet in all). Use a wet-film gauge on every coat.
FLEXCOAT-PU stays tacky for days — that is normal. FPU is not designed to be exposed to traffic or weather and always gets a top membrane. Do not wait for it to become tack-free: apply PPM or HPP once the FPU can be recoated (typically 8–12 hours after the last FPU coat) and within 72 hours. Keep foot traffic, dust and debris off the tacky surface; if it has been left longer or picked up dirt, clean it and confirm adhesion with a test patch before top-coating.
PPM or HPP on Top?
| PPM — standard | HPP — fast option | |
| Chemistry | Single-component, moisture-cured, UV-stable polyurea | Two-component polyaspartic, 1:1 by weight |
| Film over FPU | 18–20 mils wet, one coat — never more than 20 | 10–15 mils wet |
| Colour | Medium grey | Clear or field-tinted to any colour |
| Typical cure | Tack-free 2–3 h; through-dry ~9 h; full cure 24–48 h (20 °C / 50% RH) | Tack-free ~1 h; light foot traffic 3–4 h; rain protection 6–12 h; full cure 5–7 days (23 °C / 50% RH) |
| Application temperature | Substrate ≥ 3 °C above dew point; cure slows in cold, dry conditions | Substrate 10–30 °C, air 10–32 °C, up to 85% RH |
| Choose it when | Medium grey is acceptable and a flexible, UV-stable polyurea top is wanted | The roof must be back in service fast, or any colour other than grey is required |
Where RMS Fits
| Roof condition | System |
| New exposed concrete roof deck, with or without occupied space below, no regular traffic | RMS, full-surface fabric |
| Existing roofing — restoration or re-cover, no regular traffic | RMS, fabric recommended; adhesion test patch first |
| Rooftop pedestrian terrace | PTS+ |
| Rooftop parking over occupied space | VTS-D+ |
RMS is a roof waterproofing system, not a traffic surface. Roofs that will carry regular foot or vehicle traffic take the ResinTech traffic coating systems.
Material Quantities per 1,000 ft²
| Item | Film | Theoretical coverage | Per 1,000 ft² |
| FLEXCOAT-PU, both coats | 56 mils wet total | ≈ 100–120 ft² per 20 kg pail | ≈ 8.5–10 pails (20 kg) |
| Reinforcing fabric | One layer | Roof area plus laps and details | ≈ 1,000 ft² plus laps |
| PPM (standard top) | 18–20 mils wet | ≈ 210–235 ft² per 10 L pail | ≈ 4.3–4.7 pails (10 L) |
| HPP (fast top) | 10–15 mils wet | ≈ 280–415 ft² per 10 L kit | ≈ 2.4–3.6 kits (10 L) |
Theoretical figures for a smooth substrate, before waste, profile, fabric take-up and detail losses. Granule-surfaced and rough existing roofs take noticeably more. Order from a measured take-off and confirm by mock-up.
Installation Sequence
- Assess the roof — substrate, drainage, moisture, joints, drains, upstands and penetrations. Movement joints get a project-specific detail; the field membrane must not bridge them on its own.
- Prepare — concrete: remove laitance, contaminants and loose material and repair defects. Existing roofing: clean, remove loose granules and failed coatings, repair splits, blisters, open laps and wet areas, let it dry, and make an adhesion test patch.
- Prime if needed — CBE or TUE on porous, marginal or moisture-risk substrates, or wherever the test patch shows it is needed.
- Detail first — reinforce corners, drains, junctions, upstands, penetrations, transitions and existing seams with FPU and fabric.
- FPU coat 1 — 25–28 mils wet; never more than 28 mils in one coat.
- Fabric — roll it into the fresh coat until fully wetted out; lap side joints at least 3 in (75 mm) and end joints at least 6 in (150 mm).
- FPU coat 2 — 25–28 mils wet, wet-on-wet as the fabric is laid or once coat 1 can be recoated; fully encapsulate the fabric and repair any pinholes or thin spots.
- Top membrane — PPM one coat at 18–20 mils wet, or HPP at 10–15 mils wet, once the FPU can be recoated and within 72 hours.
- Cure, protect and record — keep the roof closed and protected from rain and standing water until cured; record batches, film builds and weather.
Site Conditions
| Condition | Requirement |
| Temperature | FPU: substrate 5–35 °C. HPP: substrate 10–30 °C, air 10–32 °C. PPM cure slows in cold, dry conditions |
| Dew point | Substrate at least 3 °C above dew point during application and cure |
| Weather | Dry, stable conditions; protect from rain, condensation and standing water before cure |
| Concrete deck | Minimum 28-day cure; sound, clean and dry; 3,600 psi compressive and 220 psi tensile pull-off recommended |
| Existing roofing | Sound, dry, clean and firmly bonded; adhesion test patch before the full application; confirm the existing roof type with ResinTech |
Limitations
- Not a traffic or wear surface — use PTS+ or VTS-D+ where the roof carries regular foot or vehicle traffic.
- FLEXCOAT-PU stays tacky and is not designed to be exposed; always cover it with PPM or HPP.
- Top membrane over FPU: PPM one coat of 18–20 mils wet, never more than 20; HPP 10–15 mils wet.
- Provide positive drainage; service under ponding or standing water is not covered by the RMS data sheet.
- Do not bridge expansion or active movement joints with field membrane alone.
- PPM is not a vapour barrier and is not for negative-side hydrostatic pressure without additional design measures.
Documents
- ResinTech RMS — System Data Sheet & Application Guide (RT-RMS Rev. 1.0)
- FLEXCOAT-PU (FPU) Technical Data Sheet — TDS-FPU-1.1
- PPM Technical Data Sheet — TDS-PPM v2.3
- HPP Technical Data Sheet — TDS-HPP-1.1
Pricing a Roof?
Canopus Supply stocks FLEXCOAT-PU, PPM and HPP in North Vancouver. Send your roof area, substrate and top-coat choice and we will price the materials from the quantities above. Call 1 (250) 233-3000 or email order@canopussupply.com.
RMS materials: FLEXCOAT-PU · PPM · HPP · TCU · CBE · TUE · ResinTech Traffic Coating Systems
Technical note: This page summarises the ResinTech RMS System Data Sheet (RT-RMS Rev. 1.0) and the FPU, PPM and HPP technical data sheets. It is general information only. Canopus Supply does not design roofing assemblies. Product selection, substrate preparation, coverage, cure time, system compatibility and final performance remain the responsibility of the purchaser, installer and project specifier. Always confirm against the current TDS, SDS, project specification and site conditions before use.
Canopus Supply Inc. — Authorised ResinTech Distributor, Metro Vancouver & BC