Exterior Caulking & Window Resealing FAQ.

We will not. New sealant can only hold as well as the surface it is bonded to — bond it to a failed, brittle bead and it inherits that failure immediately. The old material comes out first, every time. It is the slow and expensive part of the job, and it is the entire reason a reseal lasts.

Yes. The failed bead is cut on both edges and pulled out along its full length, and the joint is then scraped and cleaned back to sound substrate before anything new goes in.

Closed-cell foam rod pushed into a deep joint before sealing, so the finished bead ends up roughly half as deep as it is wide and bonds to two faces rather than three. Without it, a deep joint gives the sealant nowhere to stretch and it tears itself apart at the first hard freeze. We set it wherever the joint calls for it.

Roughly ninety-nine percent of our work is professional-grade DOWSIL silicone, because exterior perimeter joints move and sit in UV, and silicone handles both better than the alternatives. Where a specific joint genuinely calls for a different chemistry — a substrate silicone will not bond to, or a low-movement joint that must be painted — we use the right product for that condition and tell you which and why.

If the draft is coming through the joint between the frame and the wall, yes — that is exactly what the reseal closes. If air is coming through the sash itself, past worn weatherstripping or a failed operating seal, that is a window hardware issue and a perimeter reseal will not fix it. We will tell you which one you have.

Please do not. Coatings will not bond to cured silicone and will peel off the bead, and painting it voids the workmanship warranty. If a joint needs to be painted, say so up front — we sequence those jobs paint-first and seal afterwards with a colour-matched bead, and where a joint genuinely has to sit under the paint film we use DOWSIL Contractors Paintable Sealant, a hybrid made to be coated.

That is the intent. DOWSIL CWS comes in a broad colour range and we select against your frame or trim colour before the job rather than defaulting to white. Send us the paint code if you have it.

No, and nobody should. The small open joints along the bottom course of a brick wall let the cavity drain and breathe. Sealing them traps water inside the wall assembly.

Our workmanship. If the bead fails, cracks, pulls away or leaks because of how we applied it, we come back and fix it free. It is written, with the exclusions stated plainly rather than buried: structural or foundation movement, substrate failure behind the joint, normal UV ageing of the product itself, damage by other trades, and any bead that has been painted over or altered after we left. It covers application, and it ends at resale.

Yes. Recurring envelope sealing and leak work on multi-unit buildings suits how we are set up. Send the building and the scope and we will quote it directly.

Across the Greater Toronto Area and the Niagara region — Etobicoke, Toronto, North York, East York, Mississauga, Oakville, Vaughan, Markham and Richmond Hill, plus Ancaster, Niagara-on-the-Lake and St. Catharines. The full service-area list is on the contact page.

No. A standard reseal is entirely exterior work and needs no interior access. We would like you there for the walkthrough at the end if you can be.

A complete whole-home reseal is one to two days on site for most properties — a single visit for the majority, two where the opening count or the access calls for it. Removal is the slow part. You get a firm duration with your quote once we have seen the elevation, and we book the whole scope rather than leaving a house half-sealed overnight.

Call us. That is what a written workmanship warranty is for. We keep photographs of the work and the product and date used on each job specifically so a callback can be triaged properly rather than argued about.