Wildfire Retardant Application in Colorado

A chemical barrier where clearance alone isn't enough

Defensible space works by removing fuel. It is the foundation of every wildfire-ready property, and it is where we start with most homeowners. But clearance has limits — you cannot remove the mature ponderosa shading your deck, the juniper screening your property line, or the wood siding wrapping the base of your house.

Wildfire retardant addresses what's left. Applied as a spray, it bonds to the cellulose in vegetation and wood rather than simply coating the surface. Under high heat it forms an insulating char layer that absorbs energy, interrupts the combustion chain, and sharply slows flame spread across treated surfaces.

Safe for our watersheds, our pets, and our people

The Blaze Blocker team chose Clore because of what independent laboratories found when they tested it. Conventional retardants have long carried a real toxicity cost; Clore was engineered specifically to avoid it, and the third-party results back that up.

What the independent testing showed

• Acute oral toxicity: LD50 greater than 5,000 mg/kg — EPA Toxicity Category IV, the lowest hazard designation available (StillMeadow, Inc., Study 26204-23).
• Heavy metals: no detectable arsenic, cadmium, chromium, lead, selenium, silver, or mercury (Eurofins Calscience, TCLP analysis).
• Aquatic toxicity: 96-hour rainbow trout LC50 of 4,450 mg/L, with full survival at concentrations up to 2,500 mg/L (McCampbell Analytical).
• Fire performance: all ten specimens self-extinguished on flame removal under California Title 19, Section 1237.1 (Intertek Building & Construction).
• Biodegradation: the formula breaks down into naturally occurring compounds once rainfall eventually removes it.

That profile matters in Colorado specifically. Our properties drain into the watersheds that supply the Front Range, and most of our clients have dogs, kids, or livestock moving through the treated area within days. Full test documentation is published on Clore's science page.

The 30-foot home ignition zone

Our application focuses on the ground where a wildfire actually reaches a house. Within 30 feet of the structure, we prioritize four things:

When to apply in Colorado

Colorado's fire season now stretches well beyond what it did a generation ago, and our driest, most dangerous stretches arrive with less warning. Retardant can be applied months ahead of peak conditions, so there's no reason to wait for a red flag warning.

1. Late spring to early summer — the primary window. Applying before the landscape cures out gives you coverage through the hottest, driest months.
2. Any time before peak conditions — the product is UV-stable and holds through temperature cycling and moderate wind, so a mid-season application still delivers a full stretch of protection.
3. Annually, as a seasonal service — sustained rainfall eventually breaks the formula down. We schedule returning clients each year alongside their defensible space maintenance.

How an application works

1. We walk the property with you and map the 30-foot ignition zone, noting trees, ladder fuels, deck exposure, and cladding.
2. We confirm defensible space is in order and flag anything that should be cleared or limbed first.
3. Our team applies the retardant by spray across the identified vegetation and combustible surfaces.
4. You receive documentation of what was treated and when — useful for insurance conversations and for scheduling next season.