OSI Quad Max Sealant Review: The Best & Most Advanced Caulk
The difference between a licensed contractor and a painter with limited knowledge is huge. In the Triangle and around Raleigh, we have seen painters looking for exterior caulking that matches pre-colored siding. Not only does it never match, but it will not last as long as OSI.
Painter caulk shrinks and cracks. OSI resists both. This dedicated, true exterior-resilient caulk does more than bridge hairline gaps. Yes, it looks and spreads nicely. But most importantly, it bonds and is strong. We use this product on all full James Hardie ColorPlus siding replacement projects in Raleigh.
While you can find it at Home Depot in limited colors, Lansing Building Supply in Garner can order any color James Hardie offers. Home renovations on 60s homes to mid-2000s get this remarkable caulk, and we are going to explain why.
Quality Caulk Sales & Marketing
Caulking is a vital sealant whether you paint, install windows, or seal any interior or exterior surface. The strength of the sealant’s bond, flexibility, and durability will determine how long whatever you seal will hold up.
If you are reading this article, chances are you are inclined to research before making a purchase, and that’s great! If you can pair that desire with a general idea of sales and marketing tactics, that would be even better! Briefly, here is an example of what we mean!
For suppliers, future sales are just as important as current sales. So, when purchasing mass-produced products, especially those related to home maintenance, such as caulking, an element of planned obsolescence is involved.
If you are a homeowner who has spoken with a contractor or other home improvement personnel, you have likely already heard the proverbial saying, “It’s just something that needs to be maintained every few years.”
The truth about caulking is that there are caulking products and materials that last longer than others. However, premium caulking brands are rarely used by local painting contractors. Why is this so?
One of the leading reasons is the ease of use or lack thereof. Another factor is that conventional premium caulking is more toxic and increases human health risks involving contact with the skin or body.
We suggest wearing gloves during all caulking applications. Always follow the manufacturer’s complete safety recommendations before applying any sealant or caulking. Most existing caulking today poses some health risks, but solvent-based caulk can be riskier than its counterparts.
Outside of painters’ preferences, the culprit for a quality caulk imbalance involves paint companies dominating the market and limiting the availability of premium caulking.
Companies such as OSI provide premium caulking options and specialize in creating a variety of premium sealants. Most importantly, the paint or coating industry does not control or influence OSI.
OSI Premium Caulking & Sealant Performance
If you are a contractor, chances are, you have heard of Quad caulking. OSI, a company originating in the Midwest of the USA, continues to expand and influence sealant standards!
OSI is dedicated to providing premium sealants that are durable and advantageous under the most severe conditions during application.
We are astounded by OSI’s Quad Max in particular. Quad Max has adhesion properties similar to those of construction adhesives, is paintable, and offers over 300 color options!
This premium caulking can be applied to wet surfaces, in below-freezing temperatures, underwater, and on surfaces over one hundred degrees without issue.
Conventional caulking requires painting shortly after application to prevent UV damage and mitigate mold growth. On the other hand, Quad Max is formulated to withstand all weather conditions without the need for painting or treating sealed areas.
OSI Premium Caulking & Sealant Advantages
For some, extreme adhesion is reason enough to distinguish and ultimately purchase Quad Max over other sealants. In our findings, the critical attributes of Quad Max are not limited to adhesion or impervious properties. Q Max offers unmatched durability, retaining both strength and flexibility like no other sealant.
Furthermore, we found that OSI’s tinted caulking solutions resulted in minimal discoloration and oxidation. Tinted sealants remain ductile and intact on projects where sealants were applied over 15 years ago.
Sealant color options and nearly limitless application requirements are advantageous to siding contractors, especially for JameHardie ColorPlus installers.
For painters, OSI caulking eliminates the need for pre-primed surfaces to promote adhesion before caulking.
Window installers can use OSI sealant systems to seal, color-match, and fill empty wall cavities around the window.
OSI provides complete sealant systems for several trades. These premium products revolutionize how painters, trim carpenters, window & door installers, and builders utilize and approach modern household caulk applications and systems.
Remaining highly versatile, OSI is the leading company, providing complete systems ranging from flashing tapes, foam, construction adhesive, sealants, and more! Furthermore, OSI Quad Max adheres to several construction materials, including OBS, wood, aluminum, vinyl, steel, composites, and glass.
If you fall into either of the previously mentioned trade categories, we highly recommend testing OSI products for yourself.
OSI Certified Installation Program
OSI also offers a certification program, strengthening its position in the window and door installation industry. This program benefits both the installer and the client.
When contractors are OSI certified, clients know their installer prioritizes premium quality and properly installs using specified OSI tapes, flashing, foam, and sealants.
When you hire an OSI-certified contractor, OSI also provides a 15-year fail-proof warranty that covers the materials, and, in some cases, you will receive a payment for potential damages. The warranty is provided for any manufacturer.
The certification process involves initial training that teaches installers proper installation procedures. After this initial training, there is a 16-module training program. Once the training is completed, installers become certified.
Further training includes instructing installers on the anatomy of doors and windows. This additional training helps them understand potential failure points and ensures that these areas are correctly installed to prevent future failures and leaks for years to come.
98% of window and door failures are due to improper installation. So, OSI’s certification program could be beneficial. For more details, please refer to OSI’s website.
The Grand Finale
OSI makes quality caulking and sealants overall. For this reason, we recommend OSI for several applications. We might use OSI caulking on your next installation.
Contact us for your free, no-obligation quote today. When we arrive, feel free to mention this OSI article—it would make our day!

