Skip to content
Johns Manville TopGard Base Coat Acrylic Elastomeric Roof Coating, Buff, 5 gal and 55 gal
Regular price $3,667.50Orders start at $399 — combine any items to reach the minimum. Learn more
Johns Manville TopGard Base Coat Acrylic Elastomeric Roof Coating, Buff, 5 gal and 55 gal
JM TopGard Base Coat is a one-part acrylic elastomeric base coating for use under TopGard 4000 or 5000 top coats, acting as an oil-bleed barrier over bituminous systems. It is available in buff in 5 gallon and 55 gallon pails; one sell unit is one pail. It blocks asphalt bleed on smooth and mineral-surfaced asphalt systems and single ply.
Key Features:
- Oil-bleed barrier: Acts as an oil-bleed barrier for bituminous systems before the reflective top coat.
- One-part acrylic: One-part acrylic elastomeric formulation, no mixing required.
- Broad substrate use: Applies over smooth and mineral surfaced asphalt-based roofing systems and single ply.
- Bleed blocking: Provides outstanding bleed-blocking over hot asphalt, asphalt emulsion, modified and built-up systems.
- Fast recoat window: Can be used within 24 hours of roof membrane installation.
- Renewable system: Supports prolonged roof life, reduced life cycle costs and a renewable roof.
Specifications Table:
| Specification | Details |
|---|---|
| Brand | Johns Manville |
| Sell unit | 1 pail (5 gal or 55 gal) |
| Product line | JM TopGard |
| Available colors | Buff |
| Available sizes | 5 gal pail and 55 gal drum |
| Material | One-part acrylic elastomeric coating |
| Color / finish | Buff |
| Pack quantity | 1 pail or drum |
| Intended use | Base coat / oil-bleed barrier under TopGard 4000 or 5000 roof coatings |
Coverage & How Much You Need:
Coverage rates are not stated in the sources; size the job from the JM TopGard system specification and substrate condition, and choose the 5 gal pail for repairs or the 55 gal drum for full roofs.
Fit and Compatibility:
Designed as the base coat beneath JM TopGard 4000 or TopGard 5000 top coats and compatible with smooth and mineral surfaced asphalt-based systems, single ply, hot asphalt, asphalt emulsion, modified and built-up roofs.
Frequently Asked Questions (FAQ):
Q: What is included in one order?
A: One pail of TopGard Base Coat in buff, in either 5 gal or 55 gal.
Q: Do I need a top coat over it?
A: Yes, it is the base coat for JM TopGard 4000 or 5000 reflective top coats.
Q: Why use a base coat on asphalt roofs?
A: It blocks oil and asphalt bleed that would otherwise stain and degrade a reflective top coat.
Q: How soon after new membrane can I apply it?
A: It can be used within 24 hours of roof membrane installation.
Q: Which size should I buy?
A: Use 5 gal pails for spot repairs and 55 gal drums for coating entire roof sections.
Expert Verdict — Reviewed by the SuperArbor Pro Desk
Never put a white acrylic top coat directly over asphalt-based roofing without a bleed-blocking base like this; bleed-through discolors and shortens the top coat's life. Confirm the substrate is dry and compatible before application. Budget for the stated JM top-coat system rather than substituting coatings, so the renewable TopGard system performs as designed.
Follow the manufacturer's safety data sheet for handling, ventilation and disposal of acrylic roof coatings.
Order JM TopGard Base Coat to block asphalt bleed before your reflective top coat.
All third party trademarks, including logos and icons, referenced on our website and product pages remain the property of their respective owners. Unless specifically identified as such, Arbor's use of third party trademarks does not indicate any relationship, affiliation, sponsorship, or endorsement between Arbor Home and the owners of these trademarks. Any references by Arbor Home to third party trademarks are to identify the corresponding third party goods.
