Frequently Asked Questions

Reach for Henry All-Season 208R. It's the only product in our lineup formulated to apply to a wet surface — it bonds to damp or actively wet roofing material. Apply it with a gloved hand or trowel directly over the problem area. Press in mesh fabric if you have a hole larger than a few millimetres. This is exactly why the Good Kit includes the 208R as its base product. Dicor and Eternabond both require a dry surface, so save those for after the immediate leak is stopped and the weather breaks.

The Good Kit ($159) is for an emergency: one area leaking, you need to stop it today, with products you can get locally in most Canadian towns. The Better Kit ($409) is for a planned maintenance day: you want to address every seam, vent, and joint on your RV or flat roof in a single session. The Best Kit ($749) is for a complete encapsulation: resurfacing the entire roof with a seamless waterproof membrane, equivalent to what a professional crew would apply. If you're not sure which tier you need, start with the question — how many square feet of roof are we talking about?

Dicor 501LSW: EPDM rubber, TPO, fibreglass, and aluminium. Henry 208R: asphalt shingles, modified bitumen, metal flashings, EPDM (contact surface only). Eternabond: EPDM, TPO, fibreglass, aluminium, galvanized steel, modified bitumen. Liquid Rubber: EPDM, TPO, fibreglass, concrete, wood, metal. Henry Flex Coat: modified bitumen, BUR, fibreglass, concrete (prime EPDM first). If you're not sure what your roof is made of, look for the seam profile: EPDM rubber roofs have visible seam laps; TPO is usually white and has heat-welded seams; fibreglass is smooth and translucent under paint.

The rule of thumb is one 10.3 oz tube per vent flange, with a perimeter bead and screw-head coverage included. A standard RV with four roof vents plus an AC unit needs five tubes. Our kits are sized accordingly: the Good Kit includes 2 tubes (1–2 vents), the Better and Best kits include 3 tubes (2–3 vents plus perimeter screw coverage). If you have more vents than the kit covers, add individual tubes — they're $37 each, or $69 for a 2-pack.

In most cases, yes — that's what it's designed for. Liquid Rubber bonds to EPDM, TPO, fibreglass, concrete, metal, and wood. The key requirements are: the surface must be clean (free of loose debris, oil, and grease), dry, and structurally sound (not delaminating or spongy). On EPDM specifically, a primer coat is sometimes recommended for maximum adhesion — check Liquid Rubber Canada's technical data sheet for your specific substrate. Do not apply over standing water; address drainage issues before coating.

Henry 208R: above -7°C, wet or dry surfaces. Dicor 501LSW: above +4°C for application; cured product functional to -40°C. Eternabond: best bond at +10°C to +43°C; cold-storage rated to -18°C. Liquid Rubber: minimum +10°C, surface and ambient. Henry Flex Coat: minimum +10°C and rising. If you're doing a fall maintenance job in Canada, try to pick a day above +10°C for anything involving Liquid Rubber or Eternabond — they need a warm surface to bond properly.

Henry 208R: about 2 hours tack-free, avoid rain for 24 hours. Dicor 501LSW: tack-free in 2–4 hours; avoid rain for 24–48 hours. Eternabond: immediate water resistance after pressing down; full bond develops over 24 hours. Liquid Rubber: tack-free in 4–8 hours; rain-safe after 48 hours; full cure in 72–96 hours. If you're working ahead of a weather system, Eternabond and 208R give you the shortest windows to work with.

Essentially correct. The Eternabond microsealant penetrates and bonds to the substrate at a chemical level. On EPDM rubber, it bonds into the membrane itself — not just the surface. Removing it means removing the substrate with it. This is intentional: it's a permanent repair system, not a temporary patch. If you apply it in the wrong place, the fix is to apply more Eternabond over the correction area, not to pull off the first piece.

At the recommended two-coat system (20 mils wet per coat), one 5-gallon pail covers 100–125 square feet. A standard Class C or Class A motorhome has a roof in the 200–250 sq ft range; for those you'd need 2 pails. A small travel trailer (24 feet or under) typically has a 150–180 sq ft roof, which one pail handles. The 5-gallon pail in the Best Kit is sized for trailers and small RVs in the 100–125 sq ft range at two-coat spec, with some material left for edges and touch-ups.

Yes. We ship Canada Post Expedited to all provinces and territories. Flat rate of $40 for orders under a threshold; free shipping on qualifying orders. Some products (the 5-gallon pails, the 18.9 L Henry 208R) are classified as heavy items and may incur additional freight charges for remote locations — if your delivery address is off the standard Canada Post network, contact us for a quote before ordering.

Some of them, yes. Henry 208R is widely stocked at Home Hardware and Canadian Tire across BC and Ontario. Henry Flex Coat is at Home Depot Canada. Dicor is harder to find locally outside of RV dealerships — RV Part Shop Canada and Amazon.ca are the most reliable sources. Eternabond is available online (Amazon.ca, Home Depot online) but rarely in-store. Liquid Rubber sells direct from Liquid Rubber Canada. Our kits bundle these products together so you don't have to coordinate four separate orders.

Yes. All prices on this site are in Canadian dollars (CAD), including taxes calculated at Canadian provincial rates. We do not ship outside of Canada at this time.