Spray On Fireproofing Over Primed Steel

Sprays are divided into a wet spray or dry spray materials describing how the material is mixed and applied.

Spray on fireproofing over primed steel. 2 3 sprayed on fireproofing material 3. All structural steel to be coated with cafco sprayfilm isolatek type intumescent coatings must first be primed with an approved primer. Monokote is an industry leading fireproofing material for skyscrapers and critical infrastructure. Fire proofing material can take anywhere from 14 to 28 days or more to fully cure depending on the thickness and environmental conditions.

Be sure to use a fireproofing material that is approved for application over a primer to ensure a good bond between the sprayed material and the primed steel member. Fire protection isn t just a good thing to have in a steel framed building it s required by the building code. No bond testing is required. Regardless the available and recommended practices for application over primed painted steel have been found to also promote adhesion of sfrms over hdg.

Painted structural steel spray applied fire resistive materials are almost always fire tested on unprimed unpainted struc tural steel. The primed surface must be free from any grease oil dirt loose mill scale rust or any other contaminant that would inhibit the bonding of the product to the primer. More than simply a code compliant product monokote fireproofing brings with it over 50 years of proven performance in the field. 16 gauge hot rolled steel panels or as specified.

While not its primary use sfrm may also provide acoustical treatment and thermal insulation for large areas where the structural members and metal. Easy and quick to apply to a wide range of substrate materials these intumescent and fire retardant solutions minimize flame spread smoke production and structural damage. Recommendations may include pre application of mechanically fastened metal lath a bonding agent and or a primer paint technically a tie coat compatible with the fireproofing hdg and. Fireproofing must be able to be sprayed straight on to the steel or adhesion cohesion may not properly take place.

A number of materials are approved for this application. Let the solvent evaporate and spray apply the primer to achieve the recommended dry film thickness dft normally 2 mils. After the primer has cured seven 7 days minimum. Building codes dictate the required thickness of the coat is applied.

Painted steel joists in dry interior use conditions fireproofing can be applied directly to primed painted joists without use of metal lath. How long does it take the fire proofing material to dry. Procedure 3 1 clean steel panels with xylene and clean rags. The product can be sprayed on steel to provide heat resistance and also can be applied over wood fabric and other building materials.